Instructions / Assembly
Quick Specs
Quick Specs
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.3
40
QUICK SPEC
METAL – HYDROSTOP® PREMIUMCOAT® + KYMAX (HS-12)
Method
Requirements
Applicaon
Instrucons
• 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, dew, fog or freezing temperatures in
forecast for 24 hours.
• GAF recommends that the surface temperature be at or less than 110°F (43°C)
during application.
• Use GAF Roof Brush to apply HydroStop® PremiumCoat® Foundaon Coat
• Spray, roller, or brush apply HydroStop® PremiumCoat® Finish Coat
1. Before applying H
ydroStop® PremiumCoat®
, an adhesion test is required to
ensure an adhesion minimum of 2.0 pounds per linear inch (PLI). Test patches to
be applied with rates listed below.
2. Tighten and/or replace exisng fasteners.
3. Power wash roof to ensure it is free of dirt, debris, oil, and other contaminants
that could negavely aect adhesion. United Cleaning Concentrate (UCC) is
recommended to clean the roof. Allow roof to completely dry.
4. Install crickets to divert water and complete other necessary sheet metal
repairs.
5. Prime rusty areas with Acrylex 400 Primer or StableRust Rust-Inhibing Primer.
For severe rust, prime area with Lock-Down Primer.
6. Horizontal seams must be 3-coursed with ashing grade and fabric. Overlap
and trapezoidal vercal seams must be treated with ashing grade only. Other
vercal seams may forgo treatment IF the seal/tape is intact on the seam or if
they are double locked.
7. Treat all roof penetraons, skylight curbs & rake edges with HydroStop®
PremiumCoat® Buer Grade Flashing with fabric.
8. Encapsulate fasteners with HydroStop® HydroCap Fastener Caps or HydroStop®
PremiumCoat® Buer Grade Flashing.
9. Apply HydroStop® PremiumCoat® Foundaon Coat and Finish Coat and Kymax
per the chart below.
METAL
HYDROSTOP® PREMIUMCOAT® SYSTEM + KYMAX
Foundaon Coat Finish Coat Kymax System Warranty
Area
Total
(Gal/Sq)
DFT*
(mils)
1st Coat
(Gal/Sq)
2nd Coat
(Gal/Sq)
Total
(Gal/Sq)
DFT*
(mils)
1st Coat
(Gal/Sq)
2nd Coat
(Gal/Sq)
Total
(Gal/Sq)
DFT*
(mils)
Total
(Gal/Sq)
DFT*
(mils)
Emerald
Pledge™
Diamond
Pledge™
20 Year
Field of Roof
(no fabric)
N/A 0 0.75 0.75 1.50 13 0.40 0.40 0.80 4.5 4.80 17.5 Yes Yes
NOTE: The following “Quick Spec” is an abbreviated specicaon and is not meant to replace the detailed
specicaon. Read the enre 3-Part CSI System Specicaon prior to starng the project. Specicaons are
available at www.gaf.com.
SEAMS & DETAILS | HYDROSTOP® PREMIUMCOAT® SYSTEM
Treatment Type Product
Total
(Gal/Sq)
DFT*
(mils)
3-Coursed Rates HydroStop® Buer Grade and Fabric 4.0 43
Flashing Grade Only Rates HydroStop® Buer Grade 2.0 19
* Dry Film Thickness (DFT) is rounded to nearest mil, and is theorecal. Actual DFT will vary dependent on substrate prole, applicaon
technique and waste factor.
Note: DFT for 3-coursed rates includes 6 mils for the fabric.