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GAF Self-Adhered Vapor Retarder XL 58 in. x 125 ft. White Butyl Rubber Roofing Membrane Roll
Regular price $540.00GAF Self-Adhered Vapor Retarder XL 58 in. x 125 ft. White Butyl Rubber Roofing Membrane Roll
GAF Self-Adhered Vapor Retarder XL is a 58 in. x 125 ft. self-adhering vapor-inhibiting membrane for approved roofing membrane assemblies, sold as one roll covering 603 square feet. It combines a tri-laminated woven polyethylene facer with a high-tack butyl rubber adhesive and requires no primer. It installs directly over steel deck beneath approved GAF membrane systems.
Key Features:
- Class A fire rated: Carries ASTM E108 Class A and FM 4470 Class 1 fire ratings directly over steel deck.
- Self-sealing design: Engineered to self-seal around fasteners and penetrations.
- Superior peel strength: Delivers three times the peel strength of self-adhered modified bitumen vapor barriers.
- No primer needed: Installs without a primer, saving time and material on the job.
- Slip-resistant surface: Embossed walking surface improves footing during installation.
- 180-day exposure: Can be left exposed for up to 180 days when installed per published GAF specifications and details.
- Fewer seams: Extra-large 603 sq. ft. roll means fewer rolls and fewer field seams per job.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | GAF |
| Sell unit | 1 roll, 58 in. x 125 ft. (603 sq. ft.) |
| Product line | GAF SA Vapor Barrier XL |
| Material | Tri-laminated woven polyethylene facer with high-tack butyl rubber adhesive |
| Color / finish | White |
| Dimensions | 58 in. x 125 ft. |
| Coverage per unit | 603 sq. ft. per roll |
| Thickness | Under-face protected by split silicone release film removed during installation |
| Wind / fire / impact rating | ASTM E108 Class A and FM 4470 Class 1 fire ratings directly over steel deck |
| Exposure rating | Up to 180 days exposed when installed per published GAF specifications |
| Surface | Slip-resistant embossed walking surface |
| Primer | Not required prior to installation |
| Intended use | Vapor retarder under approved roofing membrane assemblies over steel deck |
| Pack quantity | 1 roll |
Coverage & How Much You Need:
One roll measures 58 in. x 125 ft. and covers 603 square feet. Divide the deck area by 603 sq. ft. to estimate rolls, allowing extra for laps and detail work.
Fit and Compatibility:
Designed for use in approved GAF roofing membrane assemblies applied over steel deck. Confirm the membrane assembly is approved for use with this vapor retarder per GAF specifications.
Frequently Asked Questions (FAQ):
Q: What is included in one order?
A: One roll of GAF Self-Adhered Vapor Retarder XL measuring 58 in. x 125 ft., covering 603 square feet.
Q: Do I need primer before installing?
A: No. The high-tack butyl adhesive is designed to bond without a primer.
Q: How long can it stay exposed?
A: Up to 180 days when installed in accordance with published GAF specifications and details.
Q: Is it fire rated?
A: Yes, it carries ASTM E108 Class A and FM 4470 Class 1 fire ratings directly over steel deck.
Q: How many rolls do I need?
A: Divide your deck area by 603 square feet per roll, then add material for seams, laps and flashing details.
Q: Is the walking surface slippery?
A: No, the membrane has a slip-resistant embossed walking surface.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
The 603 sq. ft. roll size is a real productivity advantage on large commercial decks, cutting roll count and field seams. Because peel strength is three times that of modified bitumen vapor barriers, it is a strong choice where wind uplift and long-term adhesion matter. Plan sequencing so the membrane is covered within 180 days or schedule the roof install accordingly.
Install per GAF published specifications and follow jobsite fall-protection and roof-safety requirements when working on steel deck.
Order the GAF Self-Adhered Vapor Retarder XL roll for your next commercial membrane assembly.
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