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G.A.P. WaterGuard SA MetalGuard Trax HT Self-Adhered Metal Roof Underlayment, 265°F Rated, 2 Squares per Roll
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G.A.P. WaterGuard SA MetalGuard Trax HT Self-Adhered Metal Roof Underlayment, 265°F Rated, 2 Squares per Roll
G.A.P. WaterGuard SA MetalGuard Trax HT is an SBS polymer-modified, tri-laminate hybrid synthetic-surfaced self-adhered underlayment built for high-temperature metal roof systems. It is rated for temperatures up to 265°F, resists UV for 120 days, and each roll covers 2 squares. It pairs with standing seam and other metal roof panels.
Key Features:
- High-Temp Rated: Temperature resistant to 265°F, providing additional protection in metal roof systems.
- SBS Modified: SBS polymer-modified, tri-laminate hybrid construction with a synthetic surfacing.
- Slip-Resistant Surface: Unique synthetic slip-resistant surface gives a greater feeling of safety and security while walking.
- Rubberized Adhesive: Exceptional SBS rubberized adhesive backing with a wide temperature installation range and great nail and screw sealability.
- 120-Day UV Exposure: Withstands up to 120 days of UV exposure for longer dry-in time and protection from temporary exposure.
- Self-Adhered: Self-adhering backing installs without fasteners sealing through the membrane.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | G.A.P. |
| Sell unit | 1 roll, 2 squares |
| Product line | G.A.P. WaterGuard SA MetalGuard Trax HT |
| Material | SBS polymer-modified tri-laminate hybrid synthetic-surfaced underlayment with rubberized adhesive backing |
| Wind / fire / impact rating | Temperature resistant to 265°F |
| Coverage per unit | 2 squares per roll (approx. 200 sq. ft.) |
| Dimensions | 2 Square/Roll |
| Exposure | 120-day UV exposure |
| Intended use | High-temperature self-adhered underlayment for metal roof systems |
| Available sizes | 2 Square/Roll |
Coverage & How Much You Need:
One roll covers 2 squares, about 200 sq. ft. Plan overlaps per the manufacturer's installation guidance and add a roll or two for valleys, eaves and penetrations.
Fit and Compatibility:
Made for use under metal roof systems, including panels that generate high roof-deck temperatures. Install on an approved deck/prime surface as required by the manufacturer; metal panels, clips and fasteners are sold separately.
Frequently Asked Questions (FAQ):
Q: What comes in one roll?
A: One self-adhered roll of WaterGuard SA MetalGuard Trax HT, sized at 2 squares per roll.
Q: Why is it rated to 265°F?
A: Metal roof systems can reach high surface temperatures, so the underlayment is engineered to resist up to 265°F without degrading.
Q: How long can it be left exposed?
A: It tolerates up to 120 days of UV exposure, giving you a longer dry-in window before the metal panels go on.
Q: Is it safe to walk on during install?
A: Yes, the unique synthetic slip-resistant surface provides a greater feeling of safety and security while walking.
Q: Does it seal around fasteners?
A: The SBS rubberized adhesive backing offers great nail and screw sealability, though the membrane is designed to self-adhere to the deck.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
For painted standing seam and other metal roofs that run hot, a 265°F-rated self-adhered membrane is the right spec — standard SBS underlayments can bleed or slip at those temperatures. Install to a clean, dry deck within the adhesive's temperature window, roll laps firmly, and sequence work so panels land within the 120-day UV limit.
Self-adhered membrane surfaces can be slippery — always use fall protection and non-marking footwear when walking on or installing the membrane.
Get G.A.P. WaterGuard SA MetalGuard Trax HT underlayment for high-temperature protection under your metal roof.
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