SURFACE PREPARATION:
Surfaces to be coated should be dry, clean, and free of dirt, dust, grease, oil and loose paint. Recommended application temperature is 40°F to 120°F. Power wash surfaces with 799 Wash-N-Prep Roof Cleaner and water. Wash roof surfaces with a minimum of 2000 psi., taking all necessary precautions to avoid damage to the roof system. Patch and repair cracks or holes with 505MS Karna-Flex WB and 5540 Resat-Mat or 3036 Poly-Mat or appropriate sealants or caulking materials. All wet insulation should be removed and replaced with like materials. New BUR roof surfaces must age a minimum of 90 days before coating. SBS and APP modified bitumen membranes should weather 30 days before coating.
APPLICATION:
Mix lightly prior to application of the coating. 405 Bond-N-Shield may be applied by brush, spray equipment or roller. For applications in higher temperatures (above 90 °F) KARNAK recommends application in multiple thin coats to prevent trapped moisture problems. Commencement of work by the contractor implies his approval of the deck surface.
ROLLER / BRUSH APPLICATION:
Apply with a 3/4" – 1-1/4” nap roller or soft roof brush.
SPRAY APPLICATION:
Utilize a standard paint spray pump or airless spray pump. Equipment manufacturer should be consulted for more complete information. Spray application should be done with a 50% over-spray pattern.
COVERAGE RATE:
Apply 405 Bond-N-Shield over the surface at the rate of 1.5 gallons per 100 sq. ft. (24 wet mils) over smooth surfaces to 2 gallons per 100 sq. ft. (32 wet mils) over granule surfaces. Allow to dry 6-24 hours then apply the selected finish coating. The total cured mil thickness of 405 Bond-N-Shield and finish coating should be 20 to 24 dry mils. Coverage will vary depending on the surface to be coated.
