Product Overview

CRS Bleed Block Primer is a single-component, low VOC water-based acrylic primer engineered for strong adhesion and bleed blocking performance.

It is designed to resist asphalt oils from migrating through the coating system and staining or discoloring the topcoat.

Its low viscosity and substrate penetrating characteristics help it perform well on a range of roofing surfaces and prepare them for a high quality silicone topcoat.

Suitable Surfaces

CRS Bleed Block Primer can be used on:

Most Flat
Roofs*

Concrete Icon

Concrete

Metal icon

Metal

Asphalt Shingles icon

Previously
Coated

*Except single-ply membranes.

Colors

Light Gray Coating Color

Light Gray

Why Use CRS Waterproofing Primer?

  • Asphalt Bleed Blocking

    Helps resist asphalt oils from migrating into the topcoat.

  • Strong Adhesion

    Extremely adhesive primer for reliable coating system performance.

  • Substrate Penetration

    Penetrates the surface to help promote bonding.

  • Low VOC Formula

    Water-based acrylic primer with low VOC characteristics.

  • Quick Drying Time

    Supports efficient project workflow.

APPLICATION & USAGE

Application & Coverage Guide

Surface / Use Recommended Amount Notes
Bare, uncoated asphalt roofs 1.5 gal. per 100 sq. ft. Allow up to 48 hours before applying topcoat.
Most flat roofs 1.5 gal. per 100 sq. ft. Apply in 1–2 coats.
Asphalt shingle roofs Approx. 2 gal. per 100 sq. ft. Usage may vary depending on how old or dry the surface is.
  • Apply 1–2 coats, depending on surface type, age and condition.
  • Apply to a clean, dry surface using a 1/4-inch exterior paint roller nap/cover.
  • Reinforcing perimeter drip edge, seams, penetrations, and other suspect areas before applying the topcoat is highly recommended.

Technical Details

Solids by Weight 67%
Solids by Volume 55%
Elongation 200% ±50
Tensile Strength 180 ±50 psi
Tear Resistance 100 pli
Fungi Resistance Zero Rating
Dry Time 4 Hours
Recoat Time 12 Hours
  • Do not dilute the product.
  • Keep containers stored in a cool, dry place away from heat, sparks, open flame, excessive heat, and moisture.
  • Do not allow product to freeze.
  • Use appropriate personal protection during application.
 

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