Frequent Questions

Fabrics, Membranes and Reinforcements: Frequently Asked Questions

Below is a list of some of the most popular fabric questions asked of us. If you have additional questions after reading this, please direct them to: info@karnakcorp.com, use our online form to request more information on a particular product, or see one of our other FAQ sections in related links.

Q: With what type of materials are Karnak Fabrics compatible?

A: The table listed below depicts the Karnak fabrics and materials they are compatible with.

Recommended Usage - Bituminous Materials
Karnak Fabric Asphalt Asphalt Coal Tar Coal Tar
  (Mastics & Coating) (Hot Applied) (Mastics & Coating) (Hot Applied)
#3036 Polymat YES NO YES NO
#5540 Resat-Mat YES NO YES NO
#34 Cotton Fabric YES NO NO NO
#31 Fiberglass Membrane YES NO YES NO
#130 Glass Mat YES NO YES NO

Recommended Usage - Other Materials
Karnak Fabric Acrylics Acrylics Urethane Solvent Base
  (Solvent) (Emulsion)
(Water Base)
  Elastomerics
#3036 Polymat YES YES YES YES
#5540 Resat-Mat YES YES YES YES
#34 Cotton Fabric YES NO NO NO
#31 Fiberglass Membrane YES YES NO YES
#130 Glass Mat YES YES NO YES

Q: What Karnak Fabrics are the best to use?

A: What Fabric to use will depend on the products being used (See Usage Chart), and the intended application. Listed below is the make-up of each Karnak Fabric.

Karnak #3036 Polymat and #5540 Resat-mat (both polyester)
  • High tensile strength
  • Rot and Mildew resistance
  • Good resistance to solvents and chemicals
  • Good low temperature properties
Karnak #31 Fiberglass Membrane and #130 Glass Mat (#130 not ASTM rated)
  • ASTM D-1668 Type III
  • Good flexibility without cracking
  • High tensile strength
  • Rot and Mildew resistant
  • Acid and Alkali resistant
Karnak #34 Cotton Fabric
  • Asphalt saturated
  • Lightweight
  • Ease of workability
  • Flexibility
  • Fiberglass and Polyester fabrics are stronger

Don't see your question here? Try one of our other FAQ sections: You can also email your question to info@karnakcorp.com, or use our online form to request more information on a particular product.

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