404 Corrosion Proof (Metal Surface Base Coat)October 20, 2016 4:55 pm
404 Corrosion Proof (Metal Surface Base Coat)
KARNAK 404 Corrosion Proof base coat is a self–priming, modified acrylic, coating that can encapsulate existing surface rust on properly prepared metal and inhibits the development of new rust on metal surfaces.
- 1.5-1.5 Gallons per 100sf**
This is intended as a general guideline only, coverage can vary based on many factors.
KARNAK 404 Corrosion Proof is recommended for use as an elastomeric coating applied to both clean and properly prepared but marginally rusty steel, and imparts excellent corrosion resistance, adhesion, and low temperature flexibility. The coating is intended for use as a base coat on new metal and lightly rusted metal roof surfaces prior to the application of KARNAK 535QS Enviro-Lastic, 501 Elasto-Brite, or 529 Renu-White topcoats. New metal surfaces must be allowed to age 30 days before coating.
Weight per Gallon: 11.0 lbs.
Solids by Weight: 62 %
Solids by Volume: 50 %
Color: Light Blue
Hardness Shore A: 70
Elongation: 400 %
Tensile Strength: 200 PSI
Preparation & Application
Surfaces to be coated should be dry, clean, and free of dirt, dust, grease, oil and loose rust or coating. 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. Seal fasteners, seams and flashings with 550 Patch-N-Go Fleece self-sealing tape or KARNAK 5540 Resat-Mat and 505MS Karna-Flex WB or appropriate sealants or caulking materials.
Mix lightly prior to application of the coating. KARNAK 404 Corrosion Proof 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.
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.
Apply KARNAK 404 Corrosion Proof over the surface at the rate of 1.5 gallons per 100 sq. ft. Allow to dry 12 hours then apply the selected finish coating. The total dry mil thickness of KARNAK 404 Corrosion Proof and finish coating should be 20 to 24 mils. Coverage will vary depending on the surface to be coated.
Caution/Care of Tools
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.”
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.
Recognized by professional roofing contractors as the best quality product in the market.
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