Thompson's® WaterSeal® Oxy Foaming Action Exterior Multi-Surface Cleaner

Oxy Foaming Action Exterior Multi-Surface Cleaner

Removes stains from dirt, mildew, algae and fungus on a range of outdoor surfaces, including wood and composite decks, fences, concrete, masonry, brick, stucco, outdoor furniture, roofs, siding and some fabrics such as awnings and vinyl plastics. It is an effective, oxygen powered cleaner concentrate that is biodegradable and gentler than chlorine bleach-based formulas.

Key Features

  • Oxygenated Foaming Action
  • Removes Stains From Dirt, Mildew, Algae and Fungus
  • Non-Bleach, Chlorine-Free Concentrate
  • Gentler* Biodegradable Cleaner

*Compared to a Chlorine Bleach Based Formula.

Approximate Coverage

  • 200 Sq. Ft/Gal.
  • Makes up to 5 Gallons
Coverage depends on the condition and porosity of the wood.

Consumer Tested

Handyman member tested and recommended. Thompson's® WaterSeal® Oxy Foaming Action Exterior Multi-Surface Cleaner has been recommended by the testers for Handy magazine - 90% of the testers said they would recommend the product; while many of the testers gave it an "Excellent" rating. It received an overall rating of 8.2 out of 10, with key factors like performance (8.7), ease of use (8.5) and finished look (8.5) scoring very well.

Consumers who used this product said the following:

"I cleaned the siding on my garage, and everyone noticed. It made my siding look new again." - Victor C.

"On a test spot on my garage floor this product removed paint and grease with little work, and no odor like with paint thinner. I plan to do the entire floor when it warms up. This product is awesome." - Chad H.

Before You Begin

  • A trial patch is recommended before starting.  Test on an inconspicuous area before applying to entire surface.
  • DO NOT MIX WITH ANY OTHER PRODUCTS, especially those containing chlorine or bleach (sodium hypochlorite)
  • Remove all deck furniture and decorative items.
  • Saturate the ground around plants and shrubs with fresh water prior to application. Then cover all plants and shrubs to protect them from overspray.  Uncover promptly after use.
  • Wear protective gloves and old clothing. When spraying, use eye protection.
  • Plan the application: for horizontal surfaces, work backwards so that you do not walk on the surface being treated.  For vertical surfaces, work from the bottom up.
  • Exercise caution when working on wet surfaces.


  • Lightly wet surface prior to applying the formula.
  • Thoroughly mix 3 caps full (6 oz.) of Oxy Foaming Action with one gallon of (preferably) hot tap water.  Mix until crystals are dissolved.  Use 4 caps full (8 oz.) for stubborn stains.
  • Use solution within 1 hour of mixing.
  • Apply with a watering can, pump-up sprayer, brush, mop, or roller.
  • Wait 5-10 minutes and then scrub the surface with a stiff bristle brush to remove all residue that does not immediately come up. Avoid use in direct sunlight and excessive heat to avoid rapid drying.  Do not allow surface to dry. Re-apply as needed.
  • Thoroughly rinse the surface using a garden hose with maximum nozzle pressure or a pressure washer at 1200 psi with a wide spray pattern. Tougher stains may require a second application.

Clean Up

  • Rinse equipment and brushes thoroughly with water.


  • Store unused powder in original container, keep dry and away from combustible materials.
  • Protect from freezing. Do not store below 32°F or above 104°F.


CAUTIONS: CONTAINS SODIUM PERCARBONATE. Keep from contact with clothing and other combustible materials. Avoid contact with eyes and skin. Use only with adequate ventilation. Store in tightly closed containers. FIRST AID: In case of eye contact, flush thoroughly with large amounts of water. Get medical attention if irritation persists. For skin contact, wash thoroughly with soap and water. If swallowed, do not induce vomiting. Call Poison Control Center, hospital emergency room, or physician immediately. DO NOT TAKE INTERNALLY. KEEP OUT OF THE REACH OF CHILDREN.

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