Basic mix calculators tell you a ratio. This one tells you if that ratio is even right for the surface.

Know the Mix.
Know the Surface.

Pick the substrate, and get sourced concentration, dwell time, and application guidance — pulled from manufacturer documentation and published industry training, with citations, not from a forum thread.

Try the Calculator ↓ Join the Waitlist

Get Substrate-Safe Dosing Guidance

Free to use, right now. No email required to see a result.

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Always verify against the current manufacturer or product instructions for your specific job before starting, and test any cleaning solution in an inconspicuous area first. Manufacturer specs change between product lines and over time. This tool gives sourced reference guidance — it does not replace on-site judgment, and it is not a substitute for professional advice on a job you're unsure about.

Organic = algae, mold, mildew. Mineral deposits = white, chalky buildup (efflorescence).
Newer = Transcend, Enhance, Select. Early-gen = Accents, Origins, Contours, Profiles, Brasilia.

Coming soon: chemical-consumption/area estimates. We don't have a sourced coverage-rate reference yet, so we're not going to guess at one. How does this tool work? ↓

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comments on one real thread where a solo operator asked how to clean an unidentified stain — and no two replies agreed on what the substrate even was, let alone the fix. Guessing the chemistry starts with guessing the surface.

How This Tool Works

No black box. Here's exactly where the numbers come from.

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Published Sources Only

Every concentration and dwell-time figure is pulled from manufacturer documentation (Dryvit, Trex, ARMA — the Asphalt Roofing Manufacturers Association) or established softwashing industry training material. Nothing here is inferred from forum comments or generated on the fly.

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Every Result Is Cited

Each result shows the source it came from, right under the guidance itself — not buried in a footer link. If two sources disagree, we show the range and say so.

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Unsourced = Coming Soon

If we don't have a defensible published source for a substrate yet, it's marked "coming soon" instead of getting a guessed answer — clay tile roofs, metal roofing, and coated concrete are next up for sourcing.

Who It's For

Operators taking on a substrate they haven't cleaned before Anyone tired of getting five different answers in a comment thread Operators who want a citation to point to, not just a gut feeling Beginners who don't yet know what they don't know

Get Notified as We Add Substrates

Join the waitlist to hear when clay tile, metal roofing, coated concrete, and saved-mix history ship.

Questions

Manufacturer documentation where we could get it (Dryvit's official EIFS cleaning guide, Trex's official care guide, the Asphalt Roofing Manufacturers Association's algae/moss bulletin) and established softwashing industry training sources everywhere else. Every result on this page names its source.
Don't extrapolate from a similar-looking substrate on this page — that's exactly the guessing this tool exists to prevent. Join the waitlist and we'll notify you as more substrates get sourced.
No. Treat this as a sourced starting point, and always check current manufacturer guidance for the specific product on your job — specs do change between product lines and over time.