GAF, part of Standard Industries, is North America's largest roofing and waterproofing manufacturer. Its commercial liquid-applied line — built largely on the United Coatings brand acquired in 2011 — spans moisture-cure silicones (Unisil, High Solids Silicone), acrylic elastomerics, the fabric-reinforced HydroStop system, and companion primers, sold through commercial distributors with warranty terms tied to published application rates.
Coating products & published specs.
Unisil Silicone Roof Coating
Silicone
- CoverageMax 1.5 gal/sq per coat, min 2 coats
- Solids71% by volume
- Film build23 / 31 / 40 dry mils for 10 / 15 / 20-yr warranty
- Warranty10 / 15 / 20-year liquid-applied limited warranty by application rate
Full specs & data sheet
Application
Coverage: Max 1.5 gal/sq per coat, min 2 coats; warranty totals 2.0 (10-yr), 2.75 (15-yr), 3.5 (20-yr) gal/sq
Film build: 23 / 31 / 40 dry mils for 10 / 15 / 20-yr warranty
Physical properties
Solids: 71% by volume
- Tensile 300 psi
- elongation 550%
- reflectance 0.83
- SRI 104
- ponding resistant
- UL790 Class A
Warranty
10 / 15 / 20-year liquid-applied limited warranty by application rate
Pricing
~$450 per 5-gal pail — source: atlanticgreensupply.com. Confirm current pricing with your distributor.
High Solids Silicone Roof Coating
Silicone
- CoverageUp to 2.75 gal/sq in one pass (substrate permitting)
- Solids96.6% by volume
- Film buildPer GAF Liquid-Applied Roofing Manual
- WarrantyGAF liquid-applied limited warranties
Full specs & data sheet
Application
Coverage: Up to 2.75 gal/sq in one pass (substrate permitting)
Film build: Per GAF Liquid-Applied Roofing Manual
Physical properties
Solids: 96.6% by volume
- Tensile 299 psi
- elongation 261%
- reflectance 0.88
- SRI 111
- UL790 Class A
- FM 4482
- Miami-Dade
Warranty
GAF liquid-applied limited warranties; marketed with 20-yr terms
Pricing
~$375 per 5-gal pail — source: coatingssupply.com. Confirm current pricing with your distributor.
Acrylic Top Coat (Roof Mate)
Acrylic
- Coverage1.0-1.5 gal/sq per coat
- Solids53% by volume
- Film build17.5 dry mils system minimum
- WarrantyGAF acrylic system limited warranties
Full specs & data sheet
Application
Coverage: 1.0-1.5 gal/sq per coat; system min 2.0-3.0 gal/sq
Film build: 17.5 dry mils system minimum
Physical properties
Solids: 53% by volume
- Tensile 284 psi
- elongation 258%
- reflectance 0.83
- SRI 105
- ENERGY STAR
- ASTM D6083
Warranty
GAF acrylic system limited warranties
Pricing
~$165 per 5-gal pail — source: atlanticgreensupply.com. Confirm current pricing with your distributor.
Premium Acrylic HydroStop Top Coat
Acrylic
- CoverageMax 1.5 gal/sq per coat
- Solids52% by volume
- Film build33 / 37 dry mils for 10 / 15-yr warranty
- Warranty10 / 15-year liquid-applied limited warranty
Full specs & data sheet
Application
Coverage: Max 1.5 gal/sq per coat; system 4.0 (10-yr) / 4.5 (15-yr) gal/sq
Film build: 33 / 37 dry mils for 10 / 15-yr warranty
Physical properties
Solids: 52% by volume
- Tensile 207 psi
- elongation 306%
- tear 93 lbf/in
- FM 4470 Severe Hail
- ASTM D6083 Type I
Warranty
10 / 15-year liquid-applied limited warranty
Pricing
~$269 per 5-gal pail — source: coatingssupply.com. Confirm current pricing with your distributor.
Multi-Purpose Primer
Primer
- Coverage0.25-1.3 gal/sq by substrate (metal 0.25-0.33
- Solids42% by volume
- WarrantyComponent of GAF coating systems
Full specs & data sheet
Application
Coverage: 0.25-1.3 gal/sq by substrate (metal 0.25-0.33; granulated asphalt 1.0-1.3)
Physical properties
Solids: 42% by volume
- Two-part water-based epoxy
- pot life ~2 hrs
- topcoat within 48 hrs
Warranty
Component of GAF coating systems
*Approximate street prices from public listings — specs & pricing researched August 2026. Actual pricing varies by distributor, region, and volume — always confirm current pricing.
Where to buy GAF coatings.
Commercial coatings (United Coatings, Unisil, HydroStop) sell through pro roofing distributors; a subset of GAF roof coatings is stocked at Home Depot.
Projects featuring GAF systems.
GAF contractors by state.
Is this your brand?
Claim this profile to manage your products, feature your certified contractors, and reach building owners comparing systems right now.