Polyglass PolyBrite 39 White Elastomeric Mastic, 2 gal or 5 gal

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Polyglass PolyBrite 39 White Elastomeric Mastic, 2 gal or 5 gal


PolyBrite 39 is a water-based white elastomeric mastic that cures into a seamless, flexible waterproof membrane for flashing and detail work in Polyglass elastomeric roof coating systems. It expands and contracts with roof movement and resists UV degradation. Available in White or Tan in 2-gallon and 5-gallon pails, sold per pail.


Key Features:

  • Seamless Membrane: Cures to form a seamless, flexible waterproof membrane over flashing details.
  • Moves With the Roof: Expands and contracts with the movement of roof surfaces.
  • Excellent Adhesion: Offers excellent adhesion, flexibility and high tensile strength.
  • UV Resistant: Resists ultraviolet degradation for long-term exposed performance.
  • Easy Workability: Water-based formulation with exceptional workability.
  • Versatile Use: Suitable for most surfaces and various roofing types.

Specifications Table:

Specification Details
Brand Polyglass
Sell unit 1 pail (2 gal or 5 gal)
Product line Polyglass PolyBrite 39
Available colors White, Tan
Available sizes 2 gal, 5 gal
Material Water-based elastomeric mastic
Finish / texture White or Tan, cures to flexible membrane
Pack quantity 1
Intended use Flashing and detail conditions in Polyglass elastomeric roof coating systems
Type Elastomeric mastic, water-based

Fit and Compatibility:

Designed for use with Polyglass elastomeric roof coating systems at flashing details, fastener heads and other detail conditions. Suitable for most surfaces and various roofing types per the manufacturer.


Frequently Asked Questions (FAQ):

Q: What sizes and colors are available?
A: PolyBrite 39 comes in White and Tan in 2-gallon and 5-gallon pails.


Q: What is it used for?
A: It seals flashing details and fastener heads as part of Polyglass elastomeric roof coating systems.


Q: Is it water-based?
A: Yes, it is a high-quality water-based elastomeric mastic with exceptional workability.


Q: Can it handle roof movement?
A: Yes, it cures to a flexible membrane that expands and contracts with the roof surface.


Q: How much area does a pail cover?
A: Coverage is not stated in the available sources; follow the project specification and Polyglass application guidance.


Q: Does it hold up in sun?
A: Yes, it offers resistance to ultraviolet degradation.


Expert Verdict — Reviewed by the SuperArbor Pro Desk

Use PolyBrite 39 as the detail mastic under elastomeric coating systems, working it into flashing terminations, fastener heads and seams before the base coat. Apply when temperatures and drying conditions allow water-based products to cure properly. Keep a Tan pail on hand where the detail color should blend with a tan coating system.

Wear gloves and eye protection when applying mastics, and follow the manufacturer's safety data sheet for handling and cleanup.


Order Polyglass PolyBrite 39 Elastomeric Mastic for durable flashing detail sealing.

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All orders are reviewed before fulfillment. You are not charged until your order is approved and ready to ship — and you may cancel at any time before that at no cost.

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