Frequently Asked Questions

Below is a list of some of the most popular Waterproofing and Dampproofing questions asked of us.

1. With what type of materials are KARNAK Fabrics compatible?

The table below depicts the KARNAK fabrics and materials they are compatible with.

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
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

 

2. What KARNAK Fabrics are the best to use?

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

3. What is the difference between “rubberized” and “plastic” products?

Both product types can flex and stretch, however only our rubberized products will return to their original shape. The higher the rubber content, the more effectively they will return to the original shape – even at colder temperatures. Plastic products can shatter or become brittle in mildly cold temperatures.

4. What is the difference between “rubberized” and “plastic” products?

Both product types can flex and stretch, however only our rubberized products will return to their original shape. The higher the rubber content, the more effectively they will return to the original shape – even at colder temperatures. Plastic products can shatter or become brittle in mildly cold temperatures.

5. What is the difference between “rubberized” and “plastic” products?

Both product types can flex and stretch, however only our rubberized products will return to their original shape. The higher the rubber content, the more effectively they will return to the original shape – even at colder temperatures. Plastic products can shatter or become brittle in mildly cold temperatures.

6. What is the difference between “rubberized” and “plastic” products?

Both product types can flex and stretch, however only our rubberized products will return to their original shape. The higher the rubber content, the more effectively they will return to the original shape – even at colder temperatures. Plastic products can shatter or become brittle in mildly cold temperatures.