Karnak 407 EPDM & SPF
Karnak 407 EPDM & SPF is a 100% acrylic elastomeric co-polymer emulsion,specifically designed as abase coating for adhesion to EPDM and SPF (Spraypolyurethane foam) roofing membranes and systems. When applied to a suitablycleaned EPDM or SPF roofs and top coated with a durable acrylic elastomericfinish coat such as 535 QS Enviro-Lastic, 501 Elasto-Brite or 529 Renu-White, thecoatings can extend the life of the existing roof membrane.The technology used in407 EPDM & SPF enables the coating to have very good adhesion and resistanceto blistering when applied to EPDM or SPF roofing systems.
407 EPDM & SPF is intended for use as an elastomeric base coat for applicationover properly preparedand clean EPDM and SPF roofing membranes and systemsprior to the application of 535 QS Enviro-Lastic, 501 Elasto-Brite or 529Renu-White finish coats. All surfaces must be properly cleaned, dry and leak freebefore coating. Suitable for horizontal and vertical applications.
Surfaces to be coated should be dry, clean and free of dirt, dust, rust, grease, oiland loose coating. Power wash EPDM surfaces using 507 SPC Primer Wash andwater and SPF surfaces with 799 Wash-N-Prep Roof Cleaner and water. Wash roofsurfaces with a minimum of 2000 psi. taking all necessary precautions to avoiddamage to the roof system. Patch and repair all cracks, leaks and damaged areaswith appropriate sealants or caulking materials. All wet insulation and foam and/orexposed foamshould be removed and replaced with like materials.407 EPDM & SPF base coat must be dry prior toapplication of additional coatings.
Mix lightly prior to application of the coating. 407 EPDM & SPF may be appliedby brush, spray quipment or roller.
BRUSH / ROLLER APPLICATION
Brush / roller application should be done applying the coating in the samedirection. Apply the finish coat perpendicular to the base coat.
Utilize a standard paint spray pump or airless spray pump. Equipmentmanufacturer should be consulted for more complete information. Sprayapplication should be done with a 50% over-spray pattern.
Apply 407 EPDM & SPF over the surface at the rate of 1.5 gallons per 100 sq.ft. Allow 407 EPDM & SPFto dry 8-24 hours before applying selected finishcoating. The total dry mil thickness of 407 EPDM & SPF and finish coating shouldbe 20 to 24 mils. Coverage will vary depending on the surface to be coated.
- Weight Per Gallon: 11.3 lbs.
- Solids By Weight: 62%
- Solids by Volume: 50%
- Color: Light Pink
Do not apply when rain is imminent. Coating must be dried before exposure towater. 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 duringapplication and while drying.
COLD-PROCESS SYSTEMS AND COATING, EITHER EMULSION OR SOLVENTBASED, SHOULD ONLY BE INSTALLED ON DECKS WITH POSITIVE DRAINAGE.PER NRCA,(NATIONAL ROOFING CONTRACTORS ASSOCIATION, “THECRI TERIA FOR JUDGING PROPER SLOPE FOR DRAINAGE IS THAT THERE BENO VIDENCE OF STANDING WATER ON THE DECK 48 HOURS AFTER ITSTOPS RAINING.”
CARE OF TOOLS
While material is still wet, tools may be cleaned with water. Dry coating can becleaned with Karna-Klean or xylene or similar solvent, taking the necessaryprecautions when handling flammable materials.
Available in 5 gallon pails and 55 gallon drums.
If further information is needed, contact Karnak Technical Services at 1-800-526-4236.
Temp. Range: -15ºF to 180ºFVOC Content: Please visit www.karnakcorp.com for latest VOCcontent as products are updated to comply with themost current VOC regulations