405 Bond-N-Shield Base Coat
Karnak 405 Bond-N-Shield is a 100% elastomeric acrylic, co-polymer emulsion, specifically designed as a base coating that will provide excellent adhesion to asphalt surfaces. The coating contains stain blockers that prevent asphalt bleed thru thus producing a brighter white coating over these surfaces. Technological advances in the Karnak laboratory also give this acrylic coating improved water blistering resistance in temporary ponding areas versus traditional acrylic coatings.
405 Bond-N-Shield is intended for use as a base coat prior to the application of, 501 Elasto-Brite, 529 Renu-White and 535QS Enviro-Lastic, topcoats on built-up roof surfaces that have aged a minimum of 90 days and SBS and APP smooth and granular modified membranes that have weathered 30 days.
Surfaces to be coated should be dry, clean, and free of dirt, dust, grease, oil and loose paint. Power wash surfaces with 799 Wash-N-Prep Roof Cleaner or TSP substitute 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 Karna-Flex WB and Resat-Mat or 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.
Mix lightly prior to application of the coating. 405 Bond-N-Shieldmay 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.
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.
BRUSH / ROLLER APPLICATION
Brush / roller application should be done applying the coating in the same direction. Apply the finish coat perpendicular to 405 Bond-N-Shield.
Apply 405 Bond-N-Shield over the surface at the rate of 1.5 gallons per 100 sq. ft. Allow dry 6-24 hours then apply the selected finish coating. The total dry mil thickness of 405 Bond-N-Shield and finish coating should be 20 to 24 mils. Coverage will vary depending on the surface to be coated.
CARE OF TOOLS
While material is still wet, tools may be cleaned with water. Dry coating can be cleaned with Karna-Klean or xylene or similar solvent, taking the necessary precautions when handling flammable materials.
- Weight Per Gallon: 11.4 lbs.
- Solids By Weight: 63%
- Solids by Volume: 49%
- Color: Light Blue
- Hardness Shore A: 60
- Elongation: 800%
- Tensile Strength: 100 PSI
- Weathering: Excellent
- Permeability: 3.0 Perms
- VOC Content: 47 gm/L
Do not apply when rain is imminent. Coating must be dried before exposure to water. Store in a heated room and keep container covered when not in use. Do not thin. Keep out of reach of children. Avoid prolonged contact with skin. Dispose of in an environmentally safe manner. Cover air intakes during application and while drying.
COLD-PROCESS SYSTEMS AND COATING, EITHER EMULSION OR SOLVENT BASED, SHOULD ONLY BE INSTALLED ON DECKS WITH POSITIVE DRAINAGE.
PER NRCA, (NATIONAL ROOFING CONTRACTORS ASSOCIATION, “THE CRITERIA FOR JUDGING PROPER SLOPE FOR DRAINAGE IS THAT THERE BE NO EVIDENCE OF STANDING WATER ON THE DECK 48 HOURS AFTER IT STOPS RAINING."
Available in 5 gallon pails and 55 gallon drums.
If further information is needed, contact Karnak Technical Services at 1-800-526-4236.