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
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
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
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
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
Specs from published manufacturer data sheets — researched August 2026. Always confirm current specifications and pricing with the manufacturer or your distributor.
Application rates by warranty term and substrate.
Quick specs on file: GAF High Solids Silicone Quick Spec — Metal (UH-1) · GAF High Solids Silicone Quick Spec — Aged PVC (UH-2) · GAF High Solids Silicone Quick Spec — Aged TPO (UH-10) · GAF High Solids Silicone Quick Spec — EPDM (UH-4) · GAF High Solids Silicone Quick Spec — Granulated Asphaltic (UH-6) · GAF High Solids Silicone Quick Spec — Smooth Asphaltic (UH-5) · GAF High Solids Silicone Quick Spec — Spray Polyurethane Foam (UH-9) · GAF Acrylic Quick Spec — Metal (LAR-1) · GAF Acrylic Quick Spec — Structural Concrete (LAR-8)
Unisil Silicone Roof Coating
Silicone71% volume solids
| Substrate | Warranty term | Total rate | Coats | Dry film | Primer | Source / notes |
|---|---|---|---|---|---|---|
| All approved substrates | 10-year warranty | 2 gal/sq (1 avg per coat) | 2 | 23 mils | — | Per the Unisil data sheet, all approved substrates; Unisil quick specs not on file yet |
| 15-year warranty | 2.75 gal/sq (1.38 avg per coat) | 2 | 31 mils | — | Per the Unisil data sheet | |
| 20-year warranty | 3.5 gal/sq (1.17 avg per coat) | 3 | 40 mils | — | Per the Unisil data sheet |
High Solids Silicone Roof Coating
Silicone96.6% volume solids
| Substrate | Warranty term | Total rate | Coats | Dry film | Primer | Source / notes |
|---|---|---|---|---|---|---|
| Metal | 10-year warranty | 1.5 gal/sq | 1 | 23 mils | See note No primer: Cleaning Concentrate (diluted) 0.5-0.7 gal/sq | GAF High Solids Silicone Quick Spec — Metal (UH-1) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available |
| 15-year warranty | 2 gal/sq | 1 | 31 mils | See note No primer: Cleaning Concentrate (diluted) 0.5-0.7 gal/sq | GAF High Solids Silicone Quick Spec — Metal (UH-1) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available |
|
| 20-year warranty | 2.5 gal/sq | 1 | 39 mils | See note No primer: Cleaning Concentrate (diluted) 0.5-0.7 gal/sq | GAF High Solids Silicone Quick Spec — Metal (UH-1) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available |
|
| PVC | 10-year warranty | 1.5 gal/sq | 1 | 23 mils | 0.33 gal/sq Multi-Purpose Primer 0.33 gal/sq (after Cleaning Concentrat… | GAF High Solids Silicone Quick Spec — Aged PVC (UH-2) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available |
| 15-year warranty | 2 gal/sq | 1 | 31 mils | 0.33 gal/sq Multi-Purpose Primer 0.33 gal/sq (after Cleaning Concentrat… | GAF High Solids Silicone Quick Spec — Aged PVC (UH-2) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available |
|
| 20-year warranty | 2.5 gal/sq | 1 | 39 mils | 0.33 gal/sq Multi-Purpose Primer 0.33 gal/sq (after Cleaning Concentrat… | GAF High Solids Silicone Quick Spec — Aged PVC (UH-2) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available |
|
| TPO | 10-year warranty | 1.5 gal/sq | 1 | 23 mils | See note No primer: Cleaning Concentrate (diluted) 0.5-0.7 gal/sq | GAF High Solids Silicone Quick Spec — Aged TPO (UH-10) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available; new TPO or under 2 PLI adhesion: contact GAF Design Services |
| 15-year warranty | 2 gal/sq | 1 | 31 mils | See note No primer: Cleaning Concentrate (diluted) 0.5-0.7 gal/sq | GAF High Solids Silicone Quick Spec — Aged TPO (UH-10) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available; new TPO or under 2 PLI adhesion: contact GAF Design Services |
|
| 20-year warranty | 2.5 gal/sq | 1 | 39 mils | See note No primer: Cleaning Concentrate (diluted) 0.5-0.7 gal/sq | GAF High Solids Silicone Quick Spec — Aged TPO (UH-10) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available; new TPO or under 2 PLI adhesion: contact GAF Design Services |
|
| EPDM | 10-year warranty | 1.5 gal/sq | 1 | 23 mils | 0.2 gal/sq EPDM Activator 0.20 gal/sq (plus Multi-Purpose Primer 0.33 … | GAF High Solids Silicone Quick Spec — EPDM (UH-4) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available |
| 15-year warranty | 2 gal/sq | 1 | 31 mils | 0.2 gal/sq EPDM Activator 0.20 gal/sq (plus Multi-Purpose Primer 0.33 … | GAF High Solids Silicone Quick Spec — EPDM (UH-4) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available |
|
| 20-year warranty | 2.5 gal/sq | 1 | 39 mils | 0.2 gal/sq EPDM Activator 0.20 gal/sq (plus Multi-Purpose Primer 0.33 … | GAF High Solids Silicone Quick Spec — EPDM (UH-4) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available |
|
| Granulated mod-bit / cap sheet | 10-year warranty | 1.5 gal/sq | 1 | 23 mils | 1.5 gal/sq Bleed Block Primer 1.50 gal/sq (after Cleaning Concentrate … | GAF High Solids Silicone Quick Spec — Granulated Asphaltic (UH-6) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available; membrane aged 30+ days; not over gravel |
| 15-year warranty | 2 gal/sq | 1 | 31 mils | 1.5 gal/sq Bleed Block Primer 1.50 gal/sq (after Cleaning Concentrate … | GAF High Solids Silicone Quick Spec — Granulated Asphaltic (UH-6) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available; membrane aged 30+ days; not over gravel |
|
| 20-year warranty | 2.5 gal/sq | 1 | 39 mils | 1.5 gal/sq Bleed Block Primer 1.50 gal/sq (after Cleaning Concentrate … | GAF High Solids Silicone Quick Spec — Granulated Asphaltic (UH-6) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available; membrane aged 30+ days; not over gravel |
|
| Smooth asphalt / mod-bit / Built-up (BUR) | 10-year warranty | 1.5 gal/sq | 1 | 23 mils | 1 gal/sq Bleed Block Primer 1.00 gal/sq (after Cleaning Concentrate … | GAF High Solids Silicone Quick Spec — Smooth Asphaltic (UH-5) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available; membrane aged 30+ days; not over gravel |
| 15-year warranty | 2 gal/sq | 1 | 31 mils | 1 gal/sq Bleed Block Primer 1.00 gal/sq (after Cleaning Concentrate … | GAF High Solids Silicone Quick Spec — Smooth Asphaltic (UH-5) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available; membrane aged 30+ days; not over gravel |
|
| 20-year warranty | 2.5 gal/sq | 1 | 39 mils | 1 gal/sq Bleed Block Primer 1.00 gal/sq (after Cleaning Concentrate … | GAF High Solids Silicone Quick Spec — Smooth Asphaltic (UH-5) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available; membrane aged 30+ days; not over gravel |
|
| Spray foam (SPF) | 10-year warranty | 1.25 gal/sq | 1 | 19 mils | See note No primer listed | GAF High Solids Silicone Quick Spec — Spray Polyurethane Foam (UH-9) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available |
| 15-year warranty | 1.75 gal/sq | 1 | 27 mils | See note No primer listed | GAF High Solids Silicone Quick Spec — Spray Polyurethane Foam (UH-9) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available |
|
| 20-year warranty | 2 gal/sq | 1 | 31 mils | See note No primer listed | GAF High Solids Silicone Quick Spec — Spray Polyurethane Foam (UH-9) May be applied in a single pass where substrate and slope allow; Emerald and Diamond Pledge warranties available |
Premium Acrylic HydroStop Top Coat
Acrylic52% volume solids
| Substrate | Warranty term | Total rate | Coats | Dry film | Primer | Source / notes |
|---|---|---|---|---|---|---|
| Metal | 10-year warranty | 1.5 gal/sq (0.75 avg per coat) | 2 | 13 mils | 0.4 gal/sq Metal Roof Primer on rusty areas, 0.3-0.5 gal/sq (after Cle… | GAF Acrylic Quick Spec — Metal (LAR-1) 0.75 + 0.75 gal/sq; a Base Coat is used as the first coat; Emerald and Diamond Pledge warranties available |
| 15-year warranty | 2 gal/sq (1 avg per coat) | 2 | 17 mils | 0.4 gal/sq Metal Roof Primer on rusty areas, 0.3-0.5 gal/sq (after Cle… | GAF Acrylic Quick Spec — Metal (LAR-1) 1.00 + 1.00 gal/sq; a Base Coat is used as the first coat; Emerald and Diamond Pledge warranties available |
|
| 20-year warranty | 3 gal/sq (1.5 avg per coat) | 2 | 25 mils | 0.4 gal/sq Metal Roof Primer on rusty areas, 0.3-0.5 gal/sq (after Cle… | GAF Acrylic Quick Spec — Metal (LAR-1) 1.50 + 1.50 gal/sq; a Base Coat is used as the first coat; Emerald and Diamond Pledge warranties available |
|
| Structural concrete | 10-year warranty | 3 gal/sq (1.5 avg per coat) | 2 | 25 mils | 0.35 gal/sq Epoxy Primer 0.3-0.4 gal/sq (after Cleaning Concentrate 0.5… | GAF Acrylic Quick Spec — Structural Concrete (LAR-8) 1.50 + 1.50 gal/sq; a Base Coat is used as the first coat; Emerald Pledge available |
| 15-year warranty | 4 gal/sq (1.33 avg per coat) | 3 | 33 mils | 0.35 gal/sq Epoxy Primer 0.3-0.4 gal/sq (after Cleaning Concentrate 0.5… | GAF Acrylic Quick Spec — Structural Concrete (LAR-8) 1.50 + 1.50 + 1.00 gal/sq; a Base Coat is used as the first coat; Emerald Pledge available |
High Tensile Acrylic Top Coat
Acrylic
| Substrate | Warranty term | Total rate | Coats | Dry film | Primer | Source / notes |
|---|---|---|---|---|---|---|
| Metal | 10-year warranty | 2.5 gal/sq (1.25 avg per coat) | 2 | 21 mils | 0.4 gal/sq Metal Roof Primer on rusty areas, 0.3-0.5 gal/sq (after Cle… | GAF Acrylic Quick Spec — Metal (LAR-1) 1.00 + 1.50 gal/sq; a Base Coat is used as the first coat; Emerald and Diamond Pledge warranties available |
| 15-year warranty | 3.5 gal/sq (1.17 avg per coat) | 3 | 29 mils | 0.4 gal/sq Metal Roof Primer on rusty areas, 0.3-0.5 gal/sq (after Cle… | GAF Acrylic Quick Spec — Metal (LAR-1) 1.00 + 1.50 + 1.00 gal/sq; a Base Coat is used as the first coat; Emerald and Diamond Pledge warranties available |
|
| 20-year warranty | 4.5 gal/sq (1.5 avg per coat) | 3 | 38 mils | 0.4 gal/sq Metal Roof Primer on rusty areas, 0.3-0.5 gal/sq (after Cle… | GAF Acrylic Quick Spec — Metal (LAR-1) 1.50 + 1.50 + 1.50 gal/sq; a Base Coat is used as the first coat; Emerald and Diamond Pledge warranties available |
|
| Structural concrete | 10-year warranty | 3 gal/sq (1.5 avg per coat) | 2 | 25 mils | 0.35 gal/sq Epoxy Primer 0.3-0.4 gal/sq (after Cleaning Concentrate 0.5… | GAF Acrylic Quick Spec — Structural Concrete (LAR-8) 1.50 + 1.50 gal/sq; a Base Coat is used as the first coat; Emerald Pledge available |
| 15-year warranty | 4 gal/sq (1.33 avg per coat) | 3 | 33 mils | 0.35 gal/sq Epoxy Primer 0.3-0.4 gal/sq (after Cleaning Concentrate 0.5… | GAF Acrylic Quick Spec — Structural Concrete (LAR-8) 1.50 + 1.50 + 1.00 gal/sq; a Base Coat is used as the first coat; Emerald Pledge available |
Acrylic Top Coat (Roof Mate)
Acrylic53% volume solids
| Substrate | Warranty term | Total rate | Coats | Dry film | Primer | Source / notes |
|---|---|---|---|---|---|---|
| Metal | 10-year warranty | 2.5 gal/sq (1.25 avg per coat) | 2 | 21 mils | 0.4 gal/sq Metal Roof Primer on rusty areas, 0.3-0.5 gal/sq (after Cle… | GAF Acrylic Quick Spec — Metal (LAR-1) 1.00 + 1.50 gal/sq; a Base Coat is used as the first coat; Emerald and Diamond Pledge warranties available |
| 15-year warranty | 3.5 gal/sq (1.17 avg per coat) | 3 | 30 mils | 0.4 gal/sq Metal Roof Primer on rusty areas, 0.3-0.5 gal/sq (after Cle… | GAF Acrylic Quick Spec — Metal (LAR-1) 1.00 + 1.50 + 1.00 gal/sq; a Base Coat is used as the first coat; Emerald and Diamond Pledge warranties available |
|
| 20-year warranty | 4.5 gal/sq (1.5 avg per coat) | 3 | 38 mils | 0.4 gal/sq Metal Roof Primer on rusty areas, 0.3-0.5 gal/sq (after Cle… | GAF Acrylic Quick Spec — Metal (LAR-1) 1.50 + 1.50 + 1.50 gal/sq; a Base Coat is used as the first coat; Emerald and Diamond Pledge warranties available |
|
| Structural concrete | 10-year warranty | 3 gal/sq (1.5 avg per coat) | 2 | 26 mils | 0.35 gal/sq Epoxy Primer 0.3-0.4 gal/sq (after Cleaning Concentrate 0.5… | GAF Acrylic Quick Spec — Structural Concrete (LAR-8) 1.50 + 1.50 gal/sq; a Base Coat is used as the first coat; Emerald Pledge available |
| 15-year warranty | 4 gal/sq (1.33 avg per coat) | 3 | 34 mils | 0.35 gal/sq Epoxy Primer 0.3-0.4 gal/sq (after Cleaning Concentrate 0.5… | GAF Acrylic Quick Spec — Structural Concrete (LAR-8) 1.50 + 1.50 + 1.00 gal/sq; a Base Coat is used as the first coat; Emerald Pledge available |
|
| All approved substrates | System minimum (TDS) | 2 gal/sq (1 avg per coat) | 2 | 17.5 mils | — | Data sheet: system minimum 2.0-3.0 gal/sq at 1.0-1.5 gal/sq per coat; substrate not stated |
WOB Acrylic TopCoat
Acrylic
| Substrate | Warranty term | Total rate | Coats | Dry film | Primer | Source / notes |
|---|---|---|---|---|---|---|
| Metal | 10-year warranty | 2.5 gal/sq (1.25 avg per coat) | 2 | 23 mils | 0.4 gal/sq Metal Roof Primer on rusty areas, 0.3-0.5 gal/sq (after Cle… | GAF Acrylic Quick Spec — Metal (LAR-1) 1.00 + 1.50 gal/sq; a Base Coat is used as the first coat; Emerald and Diamond Pledge warranties available |
| 15-year warranty | 3.5 gal/sq (1.17 avg per coat) | 3 | 32 mils | 0.4 gal/sq Metal Roof Primer on rusty areas, 0.3-0.5 gal/sq (after Cle… | GAF Acrylic Quick Spec — Metal (LAR-1) 1.00 + 1.50 + 1.00 gal/sq; a Base Coat is used as the first coat; Emerald and Diamond Pledge warranties available |
|
| 20-year warranty | 4.5 gal/sq (1.5 avg per coat) | 3 | 42 mils | 0.4 gal/sq Metal Roof Primer on rusty areas, 0.3-0.5 gal/sq (after Cle… | GAF Acrylic Quick Spec — Metal (LAR-1) 1.50 + 1.50 + 1.50 gal/sq; a Base Coat is used as the first coat; Emerald and Diamond Pledge warranties available |
|
| Structural concrete | 10-year warranty | 3 gal/sq (1.5 avg per coat) | 2 | 28 mils | 0.35 gal/sq Epoxy Primer 0.3-0.4 gal/sq (after Cleaning Concentrate 0.5… | GAF Acrylic Quick Spec — Structural Concrete (LAR-8) 1.50 + 1.50 gal/sq; a Base Coat is used as the first coat; Emerald Pledge available |
| 15-year warranty | 4 gal/sq (1.33 avg per coat) | 3 | 37 mils | 0.35 gal/sq Epoxy Primer 0.3-0.4 gal/sq (after Cleaning Concentrate 0.5… | GAF Acrylic Quick Spec — Structural Concrete (LAR-8) 1.50 + 1.50 + 1.00 gal/sq; a Base Coat is used as the first coat; Emerald Pledge available |
Rates transcribed from the manufacturer’s published quick specs and data sheets — September 28, 2026. Premium members load any term straight into the material calculator. Always confirm current specifications with the manufacturer.
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.
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