Hard Water Deposits, Rust, Soil, Plant, Wood Stains

Regular cleaning of Sundek by hosing and using a squeegee or push broom to remove standing water is the most effective method of minimizing these stains. If stains begin to appear, clean the area with Lime Away, Whink, or a commercial descaler and rinse well.

Heavier mineral deposits require more aggressive procedures such as a light acid wash.

• Mix Muriatic acid solution. (20-40% acid to water) Always add acid to water not water to acid.
• Dampen the surface with a mist of water. Do not apply acid to dry surface.
• Apply acid solution to damp surface with plastic sprayer or sprinkler can.
• Lightly scrub deck with a deck broom until the solution stops “fizzing.”
• When the fizzing activity stops, it is a sign that the acid has finished working. Do not allow solution to dry!
• Rinse off solution with high-pressure nozzle.
• Use a squeegee or deck broom to remove any excess water.
• Neutralize with soda ash, baking soda or TSP – scrub lightly.
• Rinse thoroughly and squeegee or broom off water.

Heavy deposits may require additional treatments and possibly a stronger acid to water ratio.

CAUTION: Always wear protective eye and skin wear when working with any acid solution. Follow safety guidelines printed on containers including use of proper respirator.