Surface to be sealed must be clean. Smooth surfaces may be wiped clean. Porous surfaces may be primed prior to application of this product. Apply with a soft bristle brush at the rate of 4 gallons per 100 sq. ft or about 1/16 of an inch thick. May be painted. Some paints may require up to one week cure time before application. Keep unopened container warm prior to use.

*Roof surfaces must be dry for coating application. Even when the surface appears dry, moisture may be trapped in the roof, deck or insulation. A moisture scan is recommended prior to application. Application of this coating within 5ºF of the dew point is not recommended. For more information on dew point calculation, see FAQS at aimbuildingmaterials.com.

**The first coat over asphalt will often stain yellow. Although #870 is highly resistant to asphalt staining, this condition is unpredictable. If brown spots appear during application with a roller, inspect the roller nap for embedded pieces of asphalt.

Uneven, alligatored or cracked roofs will require the higher rate of application.

***EPDM roofs may exhibit temporary swelling if application rates are significantly exceeded. If swelling occurs do not proceed with additional coats until it has subsided.

Certain PVC roofs may contain plasticizers that can soften #870. Applicator is responsible for determining the type and manufacturer of the roof to be coated. If unsure of the type of roof system to be coated, consult AIM Technical Department to obtain positive identification.

Clean up with mineral spirits or waterless hand cleaner. Use care when handling solvents.