LRS Karna-Flex

LRS Karnak Karna-Flex is an elastomeric, thermoplastic-rubber sealant formulated for use on properly prepared metal, concrete, spray polyurethane foam and plywood roof substrates. Its ease of application, superior adhesion, elasticity and durability make Karna-Flex an ideal repair sealant. 

Best Uses

LRS Karna-Flex’s elastomeric properties make it an excellent sealant for prepared metal, concrete, 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.

• One component—no need to intermix with other materials
• Easy application by brush or caulking gun
• Superior film—forms a durable, weather resistant elastomeric membrane
• Has superior adhesive and cohesive strength
• Low temperature flexibility—specially selected polymers and resins impart superior low temperature properties to the coating

Application

SURFACE PREPARATION
All surfaces to be sealed must be clean, dry and free from oil, grease and other foreign matter.

APPLICATION
Apply Karna-Flex by brush in the following manner:

Horizontal Seams and Cracks 1/16 Inch wide or larger
Using Karnak 550 Patch-N-Go Fleece Self Sealing Tape, adhere tape to crack as directed per production application guidelines. Apply Karna-Flex at an average thickness of 1/16 Inch to completely cover the polyester face of the tape and feather out.

Or, using Karnak Resat-Mat, apply Karna-Flex at an average thickness of 1/16 inch to completely cover the crack. Immediately embed one layer of Resat-Mat and cover with another application of Karna-Flex. 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.