> ## Content Index > Fetch the complete content index at: https://ijcci.net/llms.txt > Use this file to discover other available public pages before exploring further. # Best Vinyl Siding Wash by Coverage and Dilution - URL: https://ijcci.net/best-solution-wash-vinyl-siding/ - Published: 2026-09-07T07:24:13.000Z - Updated: 2026-09-07T09:49:20.000Z - Description: Seven house washes compared on published coverage, dilution ratio and container size, with a named winner for whole-house jobs and a cheaper pick for a single stained wall. - Author: Dane Pruitt - Tags: Cleaning & Laundry, #Home Exterior, Cleaning Supplies The best solution to wash vinyl siding is Simple Green Oxy Solve House and Siding, a 128 fl oz peroxide concentrate the brand says covers up to 6,400 sq ft. If you can't run a pressure washer, 30 Seconds Outdoor Cleaner ships three 64 fl oz bottles with a hose-end attachment instead. Get this wrong and the failure is specific: a wash that streaks, a formula that bleaches the mulch bed under the wall, or a jug that runs dry on the third elevation with two walls still green. In this guide 1. [Best solution to wash vinyl siding at a glance](#best-solution-to-wash-vinyl-siding-at-a-glance) 2. [Why three picks were cut before the shortlist](#why-three-picks-were-cut-before-the-shortlist) 3. [What actually decides a vinyl siding wash?](#what-actually-decides-a-vinyl-siding-wash) 4. [1\. Simple Green Oxy Solve House and Siding Pressure Washer — Best overall](#1-simple-green-oxy-solve-house-and-siding-pressure-washer-%E2%80%94-best-overall) 5. [2\. 30 Seconds Outdoor Cleaner — Best premium](#2-30-seconds-outdoor-cleaner-%E2%80%94-best-premium) 6. [3\. KÄRCHER House & Siding Cleaner for Pressure Washers — Best for families](#3-k%C3%A4rcher-house-siding-cleaner-for-pressure-washers-%E2%80%94-best-for-families) 7. [4\. ZEP INC 128OZ House/Siding Wash — Best for beginners](#4-zep-inc-128oz-housesiding-wash-%E2%80%94-best-for-beginners) 8. [5\. AL-NEW Outdoor Cleaner — Best for heavy use](#5-al-new-outdoor-cleaner-%E2%80%94-best-for-heavy-use) 9. [6\. Shutter Renu Renu Universal House Wash-Incredible Coverage — Most versatile](#6-shutter-renu-renu-universal-house-wash-incredible-coverage-%E2%80%94-most-versatile) 10. [7\. Krud Kutter Multi Purpose House Wash — Best budget pick](#7-krud-kutter-multi-purpose-house-wash-%E2%80%94-best-budget-pick) 11. [Pressure washer, hose-end sprayer or bucket?](#pressure-washer-hose-end-sprayer-or-bucket) 12. [How much concentrate does one house take?](#how-much-concentrate-does-one-house-take) 13. [What the labels don't tell you about "no-rinse"](#what-the-labels-dont-tell-you-about-no-rinse) 14. [The verdict](#the-verdict) 15. [FAQ](#faq) ## Best solution to wash vinyl siding at a glance | Pick | Claimed coverage | Application | Price | | --------------------------------------------------------------------------------------------------------------------------------- | ----------------------------- | ---------------------------------- | ---------------------------------------------------------------- | | **Best overall**[Simple Green Oxy Solve House and Siding Pressure Washer](https://www.amazon.com/dp/B07DVVJQCG?tag=ijcci-20) | 6,400 sq ft claim | Pressure washer128 fl oz | [Check Price](https://www.amazon.com/dp/B07DVVJQCG?tag=ijcci-20) | | **Best premium**[30 Seconds Outdoor Cleaner](https://www.amazon.com/dp/B07L6YC9W8?tag=ijcci-20) | 600 sq ft per gal, non-porous | Hose-end sprayer3 x 64 fl oz | [Check Price](https://www.amazon.com/dp/B07L6YC9W8?tag=ijcci-20) | | **Best for families**[KÄRCHER House & Siding Cleaner for Pressure Washers](https://www.amazon.com/dp/B0DPKNJ9GM?tag=ijcci-20) | Makes 40 gal claim | Washer, foam cannon or hand1 count | [Check Price](https://www.amazon.com/dp/B0DPKNJ9GM?tag=ijcci-20) | | **Best for beginners**[ZEP INC 128OZ House/Siding Wash](https://www.amazon.com/dp/B00G5KHWZA?tag=ijcci-20) | 5,000 sq ft claim | Makes 20 gal128 fl oz | [Check Price](https://www.amazon.com/dp/B00G5KHWZA?tag=ijcci-20) | | **Best for heavy use**[AL-NEW Outdoor Cleaner](https://www.amazon.com/dp/B0BY3BNG5M?tag=ijcci-20) | Not published | Hose-end sprayer2 x 32 fl oz | [Check Price](https://www.amazon.com/dp/B0BY3BNG5M?tag=ijcci-20) | | **Most versatile**[Shutter Renu Renu Universal House Wash-Incredible Coverage](https://www.amazon.com/dp/B00LSY3ZRW?tag=ijcci-20) | 2,000+ sq ft claim | Concentrate128 fl oz | [Check Price](https://www.amazon.com/dp/B00LSY3ZRW?tag=ijcci-20) | | **Best budget pick**[Krud Kutter Multi Purpose House Wash](https://www.amazon.com/dp/B000I22LKW?tag=ijcci-20) | Not published | Spray and rinse32 oz | [Check Price](https://www.amazon.com/dp/B000I22LKW?tag=ijcci-20) | ## Why three picks were cut before the shortlist I started from a much longer list of exterior cleaners and cut on three grounds. Reading the disqualifications first tells you more than reading the winners. 1. **No siding named on the listing.** Plenty of driveway and deck cleaners will technically wet vinyl. If the listing didn't put siding in the title or the feature claims, it didn't make the cut, because vinyl panels lap over each other and a formula written for flat concrete has no reason to behave in a lap joint. 2. **No published quantity.** Two contenders listed a "gallon" with no fluid ounce figure and no dilution guidance. Without a number, you can't work out whether one container does one wall or four. 3. **Single-purpose spot removers.** Rust removers and mildew pens clean a stain. They don't wash a house, and buying six of them costs more than one concentrate. What survived is seven products where every one names vinyl siding directly. Six of the seven are concentrates, so the container size on the label is not the amount of liquid you'll spray. Four publish a coverage or dilution figure you can plan a weekend around: Simple Green at 6,400 sq ft, ZEP at 5,000 sq ft, KÄRCHER at 40 gallons mixed, and Shutter Renu at 2,000+ sq ft. Three don't. That single split did more to order this list than any other data point, and it's the reason the cheapest bottle here finished last. ## What actually decides a vinyl siding wash? Most guides for the best solution to wash vinyl siding compare active ingredients. Bleach versus peroxide versus surfactant. That argument matters far less than it reads, because on non-porous vinyl almost anything with a surfactant will lift dirt if you leave it wet long enough. Coverage per container is what actually decides it. Vinyl siding is a large, continuous, vertical surface, and vertical surfaces waste product. Solution runs down before it dwells. A two-storey house wall is easily 500 to 900 sq ft, and four elevations plus soffits and shutters puts a modest home well past 2,000 sq ft. That's why the coverage claims here spread so widely and why the spread matters: - **Simple Green Oxy Solve**: up to 6,400 sq ft from 128 fl oz, per the brand - **ZEP House/Siding Wash**: up to 5,000 sq ft, and 20 gallons mixed - **KÄRCHER House & Siding Cleaner**: up to 40 gallons mixed, which is double ZEP's mixed volume - **Shutter Renu**: 2,000+ sq ft - **30 Seconds**: 600 sq ft per gallon on non-porous surfaces, 200 sq ft on porous Those last two numbers are the interesting ones. 30 Seconds is the most expensive pick here and publishes the lowest coverage per gallon by a wide margin, because it's a ready-to-spray dwell cleaner rather than a heavy concentrate. You're paying for the hose-end attachment and the no-scrub method, not for volume. The second deciding factor is your equipment. Three of these want a pressure washer or foam cannon. Two ship with a hose-end sprayer. Two are plain concentrates you mix yourself. Buy the wrong one and the bottle sits in the garage. ## 1\. Simple Green Oxy Solve House and Siding Pressure Washer — Best overall **One 128 fl oz jug with a claimed 6,400 sq ft of reach, using peroxide instead of bleach, which is the combination most siding jobs actually need.** [![Green jug of Simple Green Oxy Solve house and siding concentrate — 128 fl oz covering a claimed 6,400 sq ft](https://m.media-amazon.com/images/I/41gn8sUZpLL._SL500_.jpg)](https://www.amazon.com/dp/B07DVVJQCG?tag=ijcci-20) **Best for:** a whole two-storey house with mildew streaks under the eaves **Skip it if:** you have no pressure washer and no plan to buy one Within this set, nothing else pairs a published coverage figure this high with a non-bleach formula. Simple Green claims 6,400 sq ft from one 9.27 lb container, which is the largest number any of the seven publishes. That's the difference between finishing four elevations and stopping to reorder. The formula uses peroxide rather than chlorine. Simple Green describes it as lifting grime "without harsh chemicals" and calls the formula orally non-toxic. Those are the brand's words, not a measured result, but the peroxide chemistry is why it earns a spot ahead of the bleach-based options for anyone washing above planting beds or a lawn. Coverage spans vinyl, aluminium, stucco, wood and brick per the listing, and it targets algae, moss and mildew stains specifically. The bottle measures 11 x 7.68 x 4.7 in, so it stores upright on a shelf rather than sprawling. The trade-off is equipment. This is a pressure washer concentrate, and the listing frames it that way. Buyers without a washer get better value from the hose-end picks below. It's also mid-range on price here, the fourth-cheapest of seven, so three options cost less if coverage isn't your bottleneck. **Pros:** - Highest published coverage in this set at 6,400 sq ft - Peroxide formula rather than chlorine bleach - Named for vinyl, aluminium, stucco, wood and brick - 128 fl oz concentrate in a compact 11 in bottle - Sells faster than every other pick here **Cons:** - Needs a pressure washer to apply as intended - No hose-end sprayer included in the box - No published warranty, unlike ZEP and Krud Kutter - Heaviest to carry at 9.27 lb per jug [Check Price on Amazon](https://www.amazon.com/dp/B07DVVJQCG?tag=ijcci-20) ## 2\. 30 Seconds Outdoor Cleaner — Best premium **Three 64 fl oz bottles plus a hose-end attachment, built for people who want the moss gone without owning a pressure washer.** [![Three white 30 Seconds Outdoor Cleaner bottles with hose-end spray attachment — no pressure washer needed](https://m.media-amazon.com/images/I/41c2+2+ZoYL._SL500_.jpg)](https://www.amazon.com/dp/B07L6YC9W8?tag=ijcci-20) **Best for:** shaded north walls with heavy moss and no washer access **Skip it if:** your siding is porous stucco or rough brick This is the only pick here that ships three bottles and a sprayer together, 192 fl oz in total across a count of 3\. The listing states the method plainly: spray on, hose off, "no more pressure washing". That single line is the entire reason it sits second. 30 Seconds targets algae, mould, mildew and moss, and the brand says it won't harm lawns, trees, shrubs or landscaping when used as directed. It also publishes an honest coverage split that most competitors dodge: up to 600 sq ft per gallon on non-porous surfaces, dropping to 200 sq ft on porous ones. Vinyl is non-porous, so you're on the better side of that ratio. It's the most expensive pick here and the second-fastest seller of the seven. At 4 lb for the whole 3-pack it's also the lightest set to carry up a ladder or around a side yard. The catch is coverage economics. 600 sq ft per gallon is roughly a tenth of what Simple Green claims per gallon of concentrate. If you're washing a large house, this becomes an expensive way to buy square footage. It's a targeted moss and stain tool, not a bulk house wash. **Pros:** - Hose-end sprayer attachment included - No pressure washer required at all - 192 fl oz total across three bottles - Lightest option here at 4 lb for the set - Published coverage split for porous and non-porous surfaces **Cons:** - Lowest coverage per gallon of any pick with a published figure - The most expensive pick in this set - Coverage drops to 200 sq ft on porous surfaces - No published warranty [Check Price on Amazon](https://www.amazon.com/dp/B07L6YC9W8?tag=ijcci-20) ## 3\. KÄRCHER House & Siding Cleaner for Pressure Washers — Best for families **Makes up to 40 gallons of ready-to-use cleaner, double ZEP's mixed volume, and applies three different ways.** [![KÄRCHER green house and siding cleaner bottle — one container makes up to 40 gallons of mixed cleaner](https://m.media-amazon.com/images/I/41TH9L17VtL._SL500_.jpg)](https://www.amazon.com/dp/B0DPKNJ9GM?tag=ijcci-20) **Best for:** families who already own a pressure washer and want the most mixed cleaner per jug **Skip it if:** you need published weight or coverage figures before buying The 40 gallon claim is what puts this third. No other pick here says it mixes that much. ZEP claims 20 gallons, so on the brands' own numbers KÄRCHER makes twice as much working solution, and it's one of the three cheapest picks in this set. For a household that washes siding, a fence and a garage door in the same weekend, mixed volume is the number that runs out first. Application flexibility helps too. The listing names pressure washer, foam cannon and manual application, which is broader than any other pressure-washer concentrate here. KÄRCHER also describes it as quick and free rinsing, so it should clear without leaving residue on dark panels, and states it's made in the USA. The listing is thin where it matters, though. There's no published weight and no square footage figure, only the 40 gallon mixed claim, which leaves you working out coverage from your own dilution habits. Dimensions are given as 11.3 x 9.4 x 7.5 in, making it the widest bottle here. Like the winner, it assumes you own washing equipment. **Pros:** - Highest mixed volume claim in this set at 40 gallons - Works with washer, foam cannon or by hand - Among the three cheapest picks here - Free-rinsing formula per the listing **Cons:** - No published weight or square footage coverage - Widest container of the seven at 9.4 in - No sprayer or applicator included - No published warranty [Check Price on Amazon](https://www.amazon.com/dp/B0DPKNJ9GM?tag=ijcci-20) ## 4\. ZEP INC 128OZ House/Siding Wash — Best for beginners **Two published numbers, 5,000 sq ft and 20 gallons mixed, plus a stated warranty, which is the simplest set of facts to plan around.** [![Red ZEP house and siding wash jug — 128 fl oz concentrate making up to 20 gallons](https://m.media-amazon.com/images/I/41LeHR5WvxL._SL500_.jpg)](https://www.amazon.com/dp/B00G5KHWZA?tag=ijcci-20) **Best for:** a first-time siding wash on a single-storey house **Skip it if:** you want a peroxide or non-bleach formula For a first attempt, ZEP removes the guesswork. It publishes both a coverage figure and a dilution outcome: up to 5,000 sq ft, and 20 gallons of mixed cleaner from one 128 fl oz jug. You can measure your walls, do the arithmetic and know before you start whether one bottle finishes the job. Only ZEP and Simple Green give you both halves of that calculation. It's the second-cheapest pick here, and one of only two products in this set with a warranty noted on the listing. That combination is unusual at the entry level. At 8 lb it's also the lightest of the four 128 fl oz jugs, which matters more than it sounds when you're moving it around a house. Where it falls short is detail. The listing carries just two feature claims, the fewest of any pick here, and says nothing about which stains it targets or what the formula is built from. Simple Green names algae, moss and mildew directly and explains its peroxide chemistry. If a non-bleach formula matters near your garden beds, ZEP doesn't confirm one either way. **Pros:** - Publishes both coverage and mixed volume - Second-cheapest pick in this set - Warranty noted on the listing - Lightest of the four 128 fl oz jugs at 8 lb **Cons:** - Only two feature claims on the entire listing - No stated formula type or active approach - No target stains named - No applicator or sprayer included [Check Price on Amazon](https://www.amazon.com/dp/B00G5KHWZA?tag=ijcci-20) ## 5\. AL-NEW Outdoor Cleaner — Best for heavy use **Two hose-end sprayer bottles instead of one, so a second stain later doesn't mean opening a fresh product.** [![Pair of AL-NEW outdoor cleaner hose-end sprayer bottles — two separate applicators for repeat jobs](https://m.media-amazon.com/images/I/41oyQn1j4sL._SL500_.jpg)](https://www.amazon.com/dp/B0BY3BNG5M?tag=ijcci-20) **Best for:** repeat spot-cleaning on siding, fences and window frames **Skip it if:** you want a single large jug rather than two sprayer bottles The two-bottle format is the point. AL-NEW ships a count of 2 at 32 fl oz each, both with hose-end delivery, so you can finish one, cap the second and come back in three months without a part-used jug going stale in the shed. Total shipped weight is 9.35 lb, the heaviest here, which suggests dense liquid rather than a thin ready-to-use mix. AL-NEW calls out a non-bleach formula explicitly and describes it as a safer alternative to messy bleach applications, safe on clothes and lawns. The listing also names an unusually specific surface list for siding owners: aluminium siding, vinyl fencing and siding, awnings, painted surfaces, mailboxes, window frames, gutters, porch enclosures and lanais. That reads like a product written for trim work as much as flat panels. Two things hold it back. There's no published coverage figure anywhere on the listing, so you're buying volume blind. And the listing concedes that "light scrubbing will really improve your results", which means this isn't a pure spray-and-rinse. Only one seller lists it, and it's the slowest-moving of the seven picks here. **Pros:** - Two separate hose-end sprayer bottles - Non-bleach formula stated on the listing - Detailed surface list covering trim, gutters and window frames - No pressure washer needed **Cons:** - No published coverage or square footage figure - Listing admits light scrubbing improves results - Only one seller lists it - Slowest seller of the seven [Check Price on Amazon](https://www.amazon.com/dp/B0BY3BNG5M?tag=ijcci-20) ## 6\. Shutter Renu Renu Universal House Wash-Incredible Coverage — Most versatile **A zero-VOC concentrate that claims oxidation removal and results holding for up to three years, on a surface list far past siding.** [![Shutter Renu universal house wash concentrate bottle — clear zero-VOC formula rated for 2,000+ sq ft](https://m.media-amazon.com/images/I/41PwxHr54oL._SL500_.jpg)](https://www.amazon.com/dp/B00LSY3ZRW?tag=ijcci-20) **Best for:** one product covering siding, decks, PVC fence and patio fabric **Skip it if:** you only ever clean siding Two claims separate this from everything else here. Shutter Renu says it removes oxidation, not just dirt and stains, and it's the only pick in this set to make that claim. Chalky, faded panels are a different problem from mildew streaks, and no other listing here addresses it. The brand also states surfaces stay clean for up to three years, which no competitor claims either. The surface range is the widest of the seven: siding, decks, fences, pavers, outdoor fabrics, PVC fencing, composite decking, garage doors, patio furniture and automotive floor mats per the listing. The formula is described as clear with zero VOCs, which is worth knowing if you're spraying near open windows. The published coverage is where it slips. 2,000+ sq ft from 128 fl oz is under a third of Simple Green's claim from the same volume, and this sits in the most expensive price group here. At 9.8 lb it's the heaviest single jug in the set. The three-year durability and oxidation claims are the brand's alone, unbacked by any figure on the listing, and this is the second-slowest seller of the seven. **Pros:** - Only pick here claiming oxidation removal - Zero-VOC clear formula - Widest surface list of any pick in this set - 128 fl oz concentrate rated 2,000+ sq ft **Cons:** - Under a third of the winner's coverage from the same 128 fl oz - Sits in the most expensive price group here - Heaviest single jug at 9.8 lb - Three-year and oxidation claims carry no supporting figures [Check Price on Amazon](https://www.amazon.com/dp/B00LSY3ZRW?tag=ijcci-20) ## 7\. Krud Kutter Multi Purpose House Wash — Best budget pick **The cheapest and smallest pick here at 32 oz, which makes it a sensible trial rather than a whole-house plan.** [![Krud Kutter 32 oz multi purpose house wash bottle — the smallest and cheapest container in this set](https://m.media-amazon.com/images/I/4163V2vg5xL._SL500_.jpg)](https://www.amazon.com/dp/B000I22LKW?tag=ijcci-20) **Best for:** one stained wall, a gutter run or a trial before committing **Skip it if:** you're washing an entire house in one weekend At 32 oz and 2.25 lb, this is a quarter the volume of the 128 fl oz jugs and the cheapest of the seven. That's the whole argument for it. If you want to see how a house wash behaves on your particular panels before buying a gallon, this is the low-commitment way to find out. The listing describes a spray-and-rinse formula for siding, brick, stucco and gutters, targeting dirt, grime and stains. It's water based, non-toxic, biodegradable, non-flammable and xylene-free per Krud Kutter, and it's one of only two picks here with a warranty noted. The 11.5 x 5.3 x 2.6 in bottle is the slimmest here and fits in a bucket caddy alongside brushes. The limits are clear. There's no published coverage figure, and 32 oz of concentrate isn't going to finish four elevations regardless of dilution. The feature bullets are also unusually weak, one of them just restates the product name. It's the second-slowest seller of the seven. Buy it to test a wall, not to wash a house. **Pros:** - Cheapest pick in this set - Smallest commitment at 32 oz and 2.25 lb - Water based, biodegradable and xylene-free per the listing - Warranty noted, matching only ZEP here **Cons:** - No published coverage figure at all - A quarter the volume of the 128 fl oz concentrates - Feature bullets add almost no usable information - Second-slowest seller of the seven [Check Price on Amazon](https://www.amazon.com/dp/B000I22LKW?tag=ijcci-20) ## Pressure washer, hose-end sprayer or bucket? Your equipment narrows this list faster than any stain type does. Sort the seven by how they go on the wall and the decision mostly makes itself. - **Pressure washer or foam cannon**: Simple Green Oxy Solve and KÄRCHER. Both are written as washer concentrates, and KÄRCHER adds foam cannon and manual application to its stated methods. - **Garden hose only**: 30 Seconds and AL-NEW. Both ship hose-end delivery in the box, so the hose you already own is the whole toolkit. - **Mix it yourself**: ZEP, Shutter Renu and Krud Kutter. These are concentrates without an included applicator, so you'll want a pump sprayer or a bucket and a soft brush. One warning on pressure washers and vinyl. High pressure aimed upward can drive water behind lap joints and into the wall cavity, which is a repair, not a cleaning. The safer approach on vinyl is chemistry doing the work at low pressure with a downward angle. That's part of why 30 Seconds markets "no more pressure washing" as a feature rather than a compromise, and why the best solution to wash vinyl siding for a nervous first-timer might be the one that never touches a washer. If you do use a washer, work bottom to top on application and top to bottom on rinse. Solution running down dry siding leaves tracks that are harder to remove than the original stain. ## How much concentrate does one house take? This is the arithmetic nobody does before buying, and it's why half-finished jobs happen. Measure each elevation, multiply length by height, add them up, then add roughly 15% for soffits, shutters and trim. A rough sense of scale from the published figures in this set: 1. **Single-storey ranch, four sides**: often lands near 1,500 to 2,000 sq ft. ZEP's 5,000 sq ft claim or Shutter Renu's 2,000+ sq ft claim both cover that on paper. 2. **Two-storey house, four sides**: commonly 2,500 to 4,000 sq ft. Simple Green's 6,400 sq ft claim leaves real headroom, and ZEP's 5,000 sq ft is close. 3. **One wall or one stained section**: a few hundred square feet. Krud Kutter's 32 oz is sized for exactly this. Where hose-end products break the pattern is dwell chemistry. 30 Seconds publishes 600 sq ft per gallon on non-porous surfaces, so 192 fl oz of product covers roughly 900 sq ft of vinyl at that rate. Fine for two shaded walls with moss. Not a whole-house purchase. Two habits that stretch whatever you buy: pre-rinse the wall so dry siding doesn't drink the first pass, and wash in overcast conditions or shade so the solution stays wet long enough to work. Product evaporating off hot vinyl in direct sun is pure waste, and it's the most common reason people conclude a cleaner "didn't work". ## What the labels don't tell you about "no-rinse" The keyword everyone searches carries an assumption that one bottle handles everything. Here's the honest reading of these seven listings. **Nothing here is confirmed as a genuine no-touch product.** 30 Seconds comes closest, describing spray on and hose off. AL-NEW openly says light scrubbing "will really improve your results", which is a quiet admission that the sprayer alone won't finish stubborn organic growth. Assume a soft-bristle brush on the worst patches regardless of which you pick. **Plant safety claims vary in strength.** 30 Seconds states it won't harm lawn, trees, shrubs or landscaping when used as directed. AL-NEW states a non-bleach formula. Simple Green describes peroxide chemistry and an orally non-toxic formula. ZEP and KÄRCHER say nothing on the subject. If your siding sits above expensive planting, that silence is information. **Longevity claims are unverifiable from a listing.** Shutter Renu's three-year figure is the boldest claim in the set, and there's no supporting number behind it. Treat it as a reason to consider the product, not a reason to skip next spring's inspection. **Coverage claims are best cases.** Every square footage figure here assumes ideal dilution on a non-porous surface. Textured panels, deep shade and heavy staining all pull those numbers down. Buy with a margin. ## The verdict Three tiers, and the price you pay maps cleanly onto what you get. At the entry end, ZEP House/Siding Wash and KÄRCHER House & Siding Cleaner are the two picks that give real numbers cheaply. ZEP publishes 5,000 sq ft and 20 gallons mixed plus a stated warranty. KÄRCHER claims 40 gallons mixed, the highest mixed volume here, and applies three ways. Krud Kutter also sits down here at 32 oz, but it's a sample, not a plan. In the middle sits Simple Green Oxy Solve, and it's the winner. The claimed 6,400 sq ft from one 128 fl oz jug is the highest published coverage in this set, the peroxide formula avoids chlorine near planting beds, and it names vinyl, aluminium, stucco, wood and brick directly. That's the most complete answer for anyone with a pressure washer. At the premium end you're buying method or breadth rather than volume. 30 Seconds bundles three bottles and a hose-end sprayer so no washer is needed, at the lowest coverage per gallon here. AL-NEW gives you two sprayer bottles for repeat jobs. Shutter Renu is the only one claiming oxidation removal and a three-year hold. Simple Green's exact advantage over 30 Seconds is square footage per container. 30 Seconds' exact advantage is that it works with nothing but a garden hose. ## FAQ ### Is the best solution to wash vinyl siding worth buying as a concentrate? The best solution to wash vinyl siding is almost always a concentrate, and the numbers here explain why. Krud Kutter's 32 oz ready-format covers one wall. Simple Green's 128 fl oz concentrate claims 6,400 sq ft, and KÄRCHER claims 40 gallons mixed. You're paying to ship water when you buy pre-diluted, and vertical siding wastes solution fast. ### What is the best value pick in this set? The best value pick depends on your equipment. ZEP is the second-cheapest here and still publishes both 5,000 sq ft of coverage and 20 gallons mixed, which is unusual at that price. KÄRCHER is also among the three cheapest and claims twice ZEP's mixed volume at 40 gallons. Both need a washer or a sprayer you supply yourself. ### Can I wash vinyl siding without a pressure washer? You can wash vinyl siding without a pressure washer using two picks here. 30 Seconds ships three 64 fl oz bottles with a hose-end attachment and states spray on, hose off. AL-NEW ships two 32 fl oz hose-end bottles, though its listing notes light scrubbing improves results. Both connect to a standard garden hose with no extra gear. ### Simple Green Oxy Solve or 30 Seconds Outdoor Cleaner? Simple Green Oxy Solve or 30 Seconds comes down to equipment and scale. Simple Green claims 6,400 sq ft from one 128 fl oz jug, making it the better whole-house choice if you own a pressure washer. 30 Seconds publishes 600 sq ft per gallon on non-porous surfaces and includes its own sprayer, so it wins for shaded moss patches without a washer. ### What is the biggest mistake when washing vinyl siding? The biggest mistake when washing vinyl siding is high-pressure spray angled upward, which pushes water behind lap joints and into the wall. The second is working in direct sun, where solution dries before it can lift anything. Pre-rinse the wall, work in shade, apply bottom to top and rinse top to bottom to avoid streaks. Start by measuring your four elevations before you add anything to a cart, because that one number decides which of these seven makes sense. Then match the container to your gear: Simple Green Oxy Solve if a pressure washer is already in the garage, 30 Seconds if a garden hose is all you have. Simple Green earns the default because it solves the problem most people actually hit, which isn't a stain that won't shift, it's running out of product with one wall left to go. *Last updated: September 30, 2026\. Product availability re-checked.* *This page contains affiliate links. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.*