Roofing Shingles All Products For Homeowners For Pros About GAF FIND A CONTRACTOR WHERE TO BUY ENGLISH HydroStop before your next project? Talk to GAF first. TALK TO GAF About HydroStop Don't reroof. Restore. The cost-effective, long-term solution for restoration of structurally sound metal roofs The HydroStop® System A liquid-applied acrylic elastomeric system for recover and reroof applications. Want to learn more about HydroStop® before your next project? Talk to GAF first. TALK TO GAF 5 Simple Steps to Metal Restoration with the HydroStop® System QUICK SPEC | CSI SPEC Step 1: Prep the roof | GAF HydroStop Metal Roof Restoration Step 2: Prime rust areas | GAF HydroStop Metal Roof Restoration Step 3: Seal seams | GAF HydroStop Metal Roof Restoration Step 4: Detail penetrations | GAF HydroStop Metal Roof Restoration Step 5: Coat the roof | GAF Hydrostop Metal Roof Restoration 1. Prep the roof Ensure the roof is clean, dry, and tight. Make any necessary repairs to the sheet metal. All loose or missing fasteners must be secured or replaced. Power wash the roof using GAF United Cleaning Concentrate (UCC). To divert water away from areas of the roof susceptible to leaks, install sheet metal crickets as needed. Application rates: Dilute with water at a 1:10 ratio. Apply the diluted cleaning solution to the substrate at the rate of 1.5 Gal/Sq. 2. Prime rust areas For light rust use GAF Acrylex 400 primer. For heavier rust that is showing signs of spreading, use our one-part urethane based Lockdown Primer. Application rates: Acrylex 400 Primer Application rate: 0.33 - 0.67 gal per 100 square ft. LockDown Primer Application rate: 0.25 gal per square ft. 3. Seal seams Seal ridges and rake edges using a roof brush with 12" HydroStop® Fabric and HydroStop® Foundation Coat (three-coursed). Vertical seams: Seal with HydroStop® Butter Grade Flashing.2 Fasteners: Encapsulate all fasteners using HydroStop® Butter Grade Flashing. For an alternate flashing option, FlexSeal Caulk Grade can also be used. Application rate: HydroStop® Butter Grade at a rate of 2.0 Gal/Sq. 4. Detail penetrations All details including curbs, ridges, and pipe penetrations must be sealed using a roof brush with 12" HydroStop® Fabric and HydroStop® Foundation Coat (three coursed). Application rate: HydroStop® Foundation Coat at a rate of 1.00-1.50 Gal/Sq 5. Coat the roof Apply HydroStop® Finish Coat per the warranty length. HydroStop offers warranty options of 10, 15, and 20 years. HydroStop FinishCoat can be applied using a brush, roller, or sprayer. A minimum of two coats is required. The second coat should not be applied until the first coat has dried (which can take up to 24 hours). Application rates: 10 year Warranty: 1.50 Gal/Sq (two coats of .75 Gal/Sq. each coat) 15 year Warranty: 2 Gal/Sq (two coats of 1 Gal/Sq. each coat) 20 year Warranty: 3 Gal/Sq (three coats of 1 Gal/Sq. each coat) 5 Products in the HydroStop System GAF United Cleaning Concentrate (UCC) For the proper cleaning of existing elastomeric coatings on roofs, metal surfaces, concrete, and masonry substrates as well as uncoated roof, deck, and wall surfaces. UCC Cleaner will help to remove debris from the roof improving adhesion during the application process. LEARN MORE HydroStop Foundation Coat A water-based acrylic base coat used in conjunction with the HydroStop Fabric. HydroStop FoundationCoat will help improve adhesion to the metal substrate and is the first layer of defense in the HydroStop system. LEARN MORE HydroStop Butter Grade Flashing A water-based, high-solids elastomeric sealant used to properly seal seams, penetrations and other vulnerable areas of the roof. LEARN MORE GAF Acrylex 400 Primer or LockDown Primer Acrylex 400 Primer is a water based primer formulated to protect areas of the roof with light rust. LockDown Primer is a Urethane based Primer used to treat more severe rust that is spreading. LockDown Primer protects severely rusted areas and stop them from continuing to rust LEARN MORE HydroStop Finish Coat HydroStop FinishCoat used in conjunction with HydroStop FoundationCoat, and HydroStop Fabric creates the HydroStop System. It is low VOC, has superior UV, and weather resistance, and is simple to apply and maintain. LEARN MORE Enhanced warranty coverage available Certain projects installed by GAF Master, Master Select™, or Premium Coating Systems contractors may be eligible for enhanced warranty coverage.* *See HydroStop® PremiumCoat® Liquid-Applied Roofing Manual for specific requirements and restrictions. When you need products, training & expertise from an industry leader Talk to GAF first — from products designed for rooftop efficiency, to dedicated technical support that can assist with the specification process, to training designed to improve installer productivity, GAF provides solutions to support your business growth and profitability. GET STARTED To save time, money and hassle on your next roofing project, talk to GAF first. TALK TO GAF Want a personalized copy of this page for your website? Homeowner ResourcesShingle Style GuideContractor ResourcesOur CompanyCareersSubscribe CONNECT WITH US TERMS OF USEPRIVACY POLICYETHICS HOTLINE © 2018-2021 GAF. All Rights Reserved. | GAF CA | GAF U.S. | Standard Industries Cookie Preferences Access or Delete My Personal Information DO NOT SELL MY PERSONAL INFORMATION We use cookies to operate our website, enhance site navigation, analyze site usage, and assist in our marketing efforts. By clicking "Accept Cookies," you agree to this use. 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