Preparation: Surfaces must be clean, dry, and free from oil, grease, release agents, laitance, dirt, dust and debris. All cracks and holes should be filled with 229 AR Elastomeric Trowel Grade prior to surface coating. Application: Karnak 229 AR Elastomeric Brush Grade should be mechanicallly mixed thoroughly prior to application. For vertical applications, use only 229 AR Elastomeric Trowel Grade. Brush Grade:
Mix thoroughly prior to using. Apply to horizontal roof surfaces with a fiber roof brush at the rate of 3 to 4 gallons per 100 square feet. Coverage will vary depending on the irregularity and porosity of the roof surface.
Trowel Grade: Apply to either vertical or hoizontal surfaces using a smooth edge trowel. Coverage will vary depending on the desired thickness. To achieve a 1/16″thickness, apply at a rate of 4 gallons per 100 square feet. 1/8″thickness apply at a rate of 8 gallons per 100 square feet. 1/4″thickness apply in two coats at the rate of 8 gallons per 100 square feet. Caulk Grade: Apply directly in and over cracks using a standard caulking gun. An application rate of 1/4″ x 1/4″ bead of cualk will yield approximately 75 linear feet per 30 oz. caulking cartridge. Coverage may vary depending on desired thickness and surface being caulked.