A-1505 Efflorescence Blocker is an extremely versatile 10% solids, clear sealer, and coating. It is formulated for use over concrete with high levels of alkalinity. It is a highly versatile emulsion polymer, which provides many of the chemical resistant performance attributes of more expensive 2K waterborne epoxy and polyurethane dispersions.
The excellent water, alkali, and efflorescence resistance of this product, in combination with its exterior durability and its ability to adhere to a variety of substrates, allow it to be used in many applications.
Preparation
- Sandblasting is the preferred method of removal of existing efflorescence or coated surface.
- If sandblasting is not feasible, remove all existing efflorescence by sanding surface and scrubbing surface with a blend of 10 parts water to 1 part muriatic acid (hydrochloric acid, HC1). Repeat as necessary.
- Completely neutralize the surface by scrubbing with liquid TSP or baking soda (rate: 1 lb baking soda to 1 gal of water) and rinsing 3-4 times with water.
- Allow surface to dry completely before application of Americrete A-1505.
Note: The efflorescence will sometimes reappear due to water being reintroduced. In this case, repeat cleaning steps as necessary.
Application
- Americrete A-1505 can be applied using a paint brush, 1⁄4” nap roller, or spray gun.
- Coverage Rates: Apply 2 thin coats at a rate of 250 to 400 square feet per gallon depending porosity of the surface and application procedure used.
- Cure Time: Product dries in 20 minutes to 2 hours depending on temperature.
- Caution: Always wear protective clothing, eye protection, and filtered masks when mixing or using the product. Wash hands after using products. Keep away from children.