QUICK SPEC
METAL – HYDROSTOP™ PREMIUMCOAT® NOTE: The following “Quick Spec” is an abbreviated specification and is not meant to replace the detailed specification. Read
the entire 3-Part CSI System Specification prior to starting the project.
Method
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Use GAF Roof Brush to apply HydroStop™ PremiumCoat® Foundation Coat
Spray, roller, or brush apply HydroStop™ PremiumCoat® Finish Coat
Requirements
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Roof must be clean, dry, and tight.
Adhesion test required to ensure proper adhesion to substrate(s).
Apply at 50°F (10°C) and rising with no rain or freezing temperatures in forecast for 24 hours.
1.
2.
Tighten and/or replace existing fasteners.
Power-wash roof to ensure it is free of dirt, debris, oil, and other contaminants that could
negatively affect adhesion. It is recommended to use United Cleaning Concentrate (UCC) to
clean the roof. Allow roof to completely dry.
Install crickets to divert water and complete other necessary sheet metal repairs.
Prime rusty areas with Acrylex 400 Primer or StableRust Rust-Inhibiting Primer. For severe
rust, prime area with Lock-Down Primer.
Treat seams.
Treat all roof penetrations, skylight curbs & rake edges with HydroStop™ PremiumCoat® Foundation Coat and HydroStop™ PremiumCoat® Fabric.
Encapsulate fasteners with HydroStop™ HydroCap Fastener Caps or HydroStop™
PremiumCoat® Butter Grade Flashing.
Apply HydroStop™ PremiumCoat® Finish Coat per the chart below:
Application
Instructions
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METAL SPECIFICATION HYDROSTOP™ PREMIUMCOAT® SYSTEM Warranty2 Limited Emerald Diamond Area Gal/Sq DFT1 Gal/Sq
DFT1 DFT1 Warranty Pledge Pledge Horizontal Seams w/fabric 2.5 27 4.0
40 Yes Yes
Yes
2.5 27 4.0 40 Yes Yes Yes 10 Year Vertical Seams w/fabric 0.75 0.75 1.5 13 Field of Roof (no fabric) 0 0 1.5 13 Yes Yes Yes Horizontal Seams w/fabric 2.5 27 4.5
44 Yes Yes
Yes
2.5 27 4.5
44 Yes Yes
Yes
15 Year Vertical Seams w/fabric 1.00 1.00 2.0 17 Field of Roof (no fabric) 0 0 2.0 17 Yes Yes Yes Horizontal Seams w/fabric 2.5 27 5.5
52 Yes Yes
Yes
2.5 27 5.5 52 Yes Yes Yes 20 Year Vertical Seams w/fabric 1.00 1.00 1.00 3.0 25 Field of Roof (no fabric) 0 0 3.0 25 Yes Yes Yes Horizontal Seams w/fabric 2.5 27 6.5
60 Yes Yes
Yes
2.5 27 6.5 60 Yes Yes Yes 25 Year Vertical Seams w/fabric 1.50 1.50 1.00 4.0 33 Field of Roof (no fabric) 0 0 4.0 33 Yes Yes Yes 1. Dry Film Thickness (DFT) is rounded to nearest mil and is theoretical. Actual DFT will vary dependent on substrate profile, application technique & waste factor. DFT includes 6 mils for fabric (where applicable). 2. Warranties available to GAF certified "Premium Contractors" only. Foundation Coat 1st Coat
2nd Coat Finish Coat 3rd 4th Gal/Sq Coat Coat Total