J & S Supply is a prominent distributor of Karnak 502MS Karna-Flex Sealant serving New York, NYC, Brooklyn, Queens, Long Island, Westchester, New Jersey, and Connecticut. Karnak 502MS Karna-Flex is an elastomeric, thermoplastic-rubber mastic formulated for use on properly prepared metal roofs as well as concrete, asphalt, spray polyurethane foam and plywood roof substrates. Its ease of application, superior adhesion, elasticity and durability make 502MS Karna-Flex an ideal repair sealant. Karnak 502MS Karna-Flex is available in 3 gallon buckets.
Karnak 502MS Karna-Flex’s elastomeric properties make it an excellent sealant for prepared metal, concrete, asphalt, spray polyurethane foam and plywood roof system details. Ideal for sealing and waterproofing metal roof seams and splits, gutters, fasteners, pinholes in metal, flashing and curb details. Also use to seal around skylights, penetrations and roof top equipment. May be applied to wet or dry surfaces.
Karna-Flex can be apply by brush or caulking gun in the following manners:
- Horizontal Seams and Cracks 1/16” wide or larger. Using Karnak 550 Patch-N-Go Fleece Self Sealing Tape, adhere tape to crack as directed per production application guidelines. Apply 502MS Karna-Flex at an average thickness of 1/16” to completely cover the polyester face of the tape and feather out.
- Or, using KARNAK Resat-Mat, apply 502MS Karna-Flex at an average thickness of 1/16” to completely cover the crack. Immediately embed one layer of Resat-Mat and cover with another application of 502MS KarnaFlex. Make sure to smooth the fabric out completely and cover. Product will cure within approximately 24 hours. If continuing with 502 Elasto-Kote System is desired, allow all repairs to cure before proceeding.