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GAF HydroStop Roof Block Brush, Natural Fiber Bristles, 6" and 10" Sizes
Regular price $105.00Orders start at $399 — combine any items to reach the minimum. Learn more
GAF HydroStop Roof Block Brush, Natural Fiber Bristles, 6" and 10" Sizes
The GAF HydroStop Roof Block Brush is a natural-fiber brush for applying liquid-applied roofing compounds such as 3-course and Base Coat/Fabric/Base Coat details. It is offered in 6" and 10" widths, each sold as one brush. Ferrules hold the bristles so the brush withstands heavy pushing during application.
Key Features:
- Natural fiber bristles: Natural-fiber bristles held together with ferrules for durability.
- Withstands heavy pushing: Ferrule construction lets the bristles withstand the heaviest pushing.
- Great compound pickup: Absorbs compounds like a sponge for easier application.
- Made for reinforcement work: Ideal for applying Base Coat/Fabric/Base Coat and 3-course details.
- Two widths: Available in 6" and 10" sizes, each sold as one brush.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | GAF |
| Sell unit | 1 brush |
| Product line | GAF HydroStop Roof Block Brush |
| Material | Natural-fiber bristles with ferrule construction |
| Available sizes | 6", 10" |
| Intended use | Applying Base Coat/Fabric/Base Coat and 3-course liquid roofing details |
| Product category | Hand tool for roofing |
Fit and Compatibility:
Designed for use with GAF HydroStop liquid-applied roofing products, including base coats, embedded fabric, and 3-course detailing compounds. Brushes, rollers, and applicators of other sizes are sold separately.
Frequently Asked Questions (FAQ):
Q: What is included in one order?
A: One roof block brush in your chosen width, 6" or 10".
Q: What is the brush used for?
A: Applying compounds like Base Coat/Fabric/Base Coat and 3-course details in liquid-applied roofing systems.
Q: Why natural fiber bristles?
A: Natural fibers absorb compounds like a sponge for easier, more even application.
Q: Will the bristles fall out under pressure?
A: The design is held together with ferrules so the bristles withstand heavy pushing.
Q: Which size should I choose?
A: The 6" brush suits smaller details and flashings; the 10" brush speeds up wider field and reinforcement work.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Natural-fiber block brushes are the preferred tool for working base coat into polyester reinforcement fabric because the fibers hold and release compound evenly without shedding into the coating. Keep a 6" brush for tight flashing and penetration details and a 10" for laps and field seams. Clean or replace the brush promptly, as cured coating will stiffen the bristles.
Work from a stable surface on low-slope roofs and follow the coating manufacturer's safety data sheet for ventilation and skin protection during application.
Order the GAF HydroStop Roof Block Brush in 6" or 10" for clean 3-course and reinforcement work.
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