Enhanced TDS
Knowde-enriched technical product data sheet
Identification & Functionality
- Product Type
- Technologies
- Product Families
Applications & Uses
- Markets
- Applications
- Application Method
- Compatible Substrates & Surfaces
- Product End Uses
- Uses
407 EPDM & SPF is intended for use as an elastomeric base coat for application over properly prepared and clean EPDM and SPF roofing membranes and systems prior to the application of an appropriate finish coat. May also be applied over concrete surfaces with positive drainage. All surfaces must be properly cleaned, dry and leak free before coating. Suitable for horizontal and vertical applications.
- Surface Preparations
Surfaces to be coated should be dry, clean and free of dirt, dust, rust, grease, oil and loose coating. Recommended application temperature is 40°F to 120°F. Power wash EPDM surfaces using 507 SPC Primer Wash and water and SPF 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 all cracks, leaks and damaged areas with appropriate sealants or caulking materials. All wet insulation and foam and/or exposed foam should be removed and replaced with like materials. 407 EPDM & SPF base coat must be dry prior to application of additional coatings.
- Application
Mix lightly prior to application of the coating. 407 EPDM & SPF 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 407 EPDM & SPF over the surface at the rate of 1.5 gallons per 100 sq. ft. (24 wet mils). Allow to dry 8-24 hours then apply the selected finish coating. The total dry mil thickness of 406 Tru-Grip and finish coating should be 20 to 24 mils. Coverage will vary depending on the surface to be coated.
Properties
- Physical Properties
Value Units Test Method / Conditions Weight per Gallon 11.3 lbs. - - Viscosity 37,500 cps ASTM D2196 Method A - - Solids by Weight 64%, Nominal - - Solids by Volume 51%, Nominal - - Color Light Pink - - Hardness, Shore A 65.0 - - Elongation 237%, Nominal ASTM D 2370 - - Tensile Strength 259 PSI, Nominal ASTM D2370 - - Tear Resistance 82 lbs. force/in ASTM D 624 - - Cure Time 24 to 48 hours @ 77°F and 50% Relative Humidity - - Application Temp. 40°F to 120°F.Service Temp (Cured Film) -15°F to 180°F -
Regulatory & Compliance
- Certifications & Compliance
Safety & Health
- Caution
Do not apply when rain is imminent. Protect from freezing. 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. For exterior use only. Cold-process systems and coatings, 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 a deck 48 hours after it stops raining.”
Packaging & Availability
- Packaging
Available in 5-gallon pails, 55-gallon drums, and 275-gallon totes.