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Repair Products

671 Karna-Seal

671 Karna-Seal is a single-component, moisture curing, 100% silicone roof sealant that offers excellent UV resistance, flexibility, and tensile strength.  671 Karna-Seal resists weathering, hardening, chalking, and cracking.

671 Karna-Seal is intended to be used to make repairs to roof substrates previously coated with 670HS Karna-Sil Ultra silicone or silicone coating by others.  The sealant also offers excellent adhesion to modified bitumen membranes, metal, *aged single-ply membranes (TPO & PVC), EPDM, Spray Polyurethane Foam and concrete roofs for making repairs to seams, flashings, penetrations, fasteners, drains and scuppers.

*TPO and PVC membranes should at least be 4 years old before using this product.

COVERAGE RATE: 671 Karna-Seal is typically applied in a 1/16” to 1/8” thickness depending upon the substrate, which equates a coverage rate of 4 to 8 gallons per 100 sq. ft.

  • No mixing, ready to use
  • Easy trowel application
  • Repairs all roof types, but best suited for silicone coatings
  • Can be applied under water
Available Sizes

2.5 gallon bucket

Categories
Repair Products
Advantages
  1. Resists permanent ponding water  
  2. Application by brush
  3. Bonds to several different roof substrates
  4. Low VOC, low odor
  5. For horizontal and vertical use, will not sag
  6. Rain safe in one (1) hour
  7. Ready to use, no mixing of components
  8. UV stable, may be left exposed
  9. Excellent weather resistance & durability

Advantages
Specifications
Uses
Physical Properties
Preparation & Application
Caution / Care of Tools

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Advantages
Specifications
Uses
Physical Properties
Preparation & Application
Caution / Care of Tools

Project Showcase

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