Reference # 2






Quantity and Color:


Polyprene® is a rubber, universal roof repair cement used for flashings, seams, pitch pans, cracks, splits and making various repairs on EPDM/PVC/TPO roofs. We offer a special Polyprene® with extra agents that provide maximized adhesion specifically for EPDM/PVC/TPO roof repairs. Polyprene® for EPDM/PVC/TPO offers a water-tight and long-lasting seal. The heavily-fibered, high-solids content prevents mud cracking, making it ideal for pitch pans as well as to seal seams, cracks, around vibrating rooftop equipment, skylights, vents, flashings, and more. Polyprene® for EPDM/PVC/TPO is available only in heavy brush grade.

  • Quickly and easily reinforces critical areas
  • All rubber, fiber reinforced — stays flexible and won’t crack when cold
  • May be used with or without PolyCore™ reinforcement, as needed
  • Can be applied thick, in one layer, without threat of mud cracking


Quantity and Color:
(Sold in 3-gallon pails.)

1×3 gal PolyPrene® for EPDM/PVC/TPO 1 -Gray
6×3 gal PolyPrene® for EPDM/PVC/TPO 6 -Gray
12×3 gal PolyPrene® for EPDM/PVC/TPO 12-Gray



850% min 

Water vapor permeability

.25 perms


400 pen

Weight per gallon

8.8 – 9.3 lb.

Solids total


Flashpoint of solvent

104° F

Dry to touch @ 77° F (50% rel. humidity)

~ 12 hrs

Ultimate Elongation


Ultimate tensile strength

600 psi min.

Peel Adhesion

4.3 pli min.

Water vapor permeability

0.25 perms

Service Temperature:

-40° – 140° F

Moisture Resistance:




Q: How do I fix blisters in my roof surface?
A: Fix blisters by making an “X” cut, laying flaps open to clean/dry out, then fill and tamp closed and add more Polyprene® to cover all edges.

Q: What do I do if I have seams with a larger than 1/16” width?
A: When working with Polyprene®, gaps being sealed should be no more than 1/16” in width. However, we have a strong solution for larger gap sealing. PolyCore™ membrane nap can be applied to cover original gaps of more than 1/16” before applying Polyprene®. This reinforces the gap and allows for a clean, water-tight seal.