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Polyglass Hydraguard Dual Pro HT Self-Adhered High-Temp Underlayment, Gray, 2 Square Roll
Regular price $159.72Orders start at $399 — combine any items to reach the minimum. Learn more
Polyglass Hydraguard Dual Pro HT Self-Adhered High-Temp Underlayment, Gray, 2 Square Roll
Polyglass Hydraguard Dual Pro HT is a self-adhered waterproofing underlayment in gray, supplied as a 2 square roll. Its modified asphalt compound is reinforced with fiberglass mat and topped with high-strength polyester fabric for high-temperature service under metal and tile roofs. The aggressive self-adhesive bottom uses patented Dual-Compound Technology with a split-release film.
Key Features:
- High-temperature rated: The polyester-fabric upper surface makes it a high temperature underlayment ideally suited for metal roof and tile applications.
- Self-adhered: An aggressive self-adhesive bottom compound bonds the membrane in place.
- Dual-Compound Technology: The patented Dual-Compound Technology bottom is protected by an easily removed split-release film.
- SEALLap lap seal: Dual Pro features SEALLap, a patented factory-applied adhesive treatment on laps.
- Dimensional stability: The proprietary asphalt compound and fiberglass mat deliver exceptional dimensional stability.
- Fiberglass reinforcement: Advanced modified asphalt compounds are reinforced with a fiberglass mat.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Polyglass |
| Sell unit | 1 roll, 2 squares |
| Product line | Hydraguard Dual Pro HT |
| Material | SBS-style modified asphalt with fiberglass mat reinforcement and polyester fabric upper surface |
| Color / finish | Gray |
| Available sizes | 2 Square/Roll |
| Assembly | Self-adhered with split-release film release liner; SEALLap factory-applied lap adhesive |
| Intended use | High-temperature waterproofing underlayment for metal and tile roof applications |
| Finish / texture | High-strength polyester fabric upper surface |
Coverage & How Much You Need:
One roll covers approximately 2 squares (200 sq ft) of roof area as listed, less laps and cut waste at eaves, valleys and penetrations. Plan overlaps per the SEALLap lap instructions so the factory lap adhesive seals each course.
Fit and Compatibility:
Designed for use under metal and tile roof systems where high underlayment temperatures occur. Install over an approved deck per the roofing system manufacturer's requirements; this listing does not state a compatible substrate list.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One gray roll of Hydraguard Dual Pro HT covering 2 squares.
Q: Why choose the HT version?
A: The high-strength polyester fabric upper surface makes it a high temperature underlayment suited for metal and tile roofs.
Q: How is it applied?
A: It is self-adhered: remove the split-release film from the patented Dual-Compound Technology bottom and press into place; laps seal with the factory SEALLap adhesive.
Q: How much area does a roll cover?
A: Each roll is listed at 2 squares; deduct for laps and detail work.
Q: Is it waterproofing?
A: Yes, it is a self-adhered waterproofing membrane with a fiberglass-reinforced modified asphalt compound.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Choose Dual Pro HT whenever metal or tile is going over the deck, because standing under panels in the sun can push ordinary underlayments past their temperature limits. Full-adhered membranes like this are the right call at eaves, valleys and penetrations where water backs up. Store rolls upright, off the ground, and apply on clean, dry decks within the manufacturer's temperature window.
Self-adhered membranes are slippery, especially with the film freshly removed or the surface wet; keep off the exposed membrane and wear fall protection on the roof.
Order Polyglass Hydraguard Dual Pro HT by the 2 square roll for high-temperature protection under your metal or tile roof.
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