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Polyglass PG 425 Wet & Dry Trowel-Grade Roof Cement, Black, 2.8 gal or 5 gal
Regular price $65.75Orders start at $399 — combine any items to reach the minimum. Learn more
Polyglass PG 425 Wet & Dry Trowel-Grade Roof Cement, Black, 2.8 gal or 5 gal
Polyglass PG 425 is a heavy, trowel-grade roof cement for wet-weather emergency repair of roof leaks, formulated to seal even in standing water. It applies to wet or dry surfaces and is non-destructive to asphalt-based roofing membranes. Sold as one pail in your choice of 2.8 gal or 5 gal, both in black.
Key Features:
- Wet weather repair: General purpose formulation for wet weather repair of roof leaks.
- Trowel-grade body: Heavy trowel-grade consistency ideal for sealing and patching temporary emergency holes and cracks.
- Works in water: Contains an additive that displaces standing water from wet surfaces to create a tight seal.
- Membrane friendly: Non-destructive to asphalt-based roofing membranes.
- Wet or dry use: Applies to wet or dry surfaces.
- Wide compatibility: For composition shingles, asphalt built-up roofs, metal and masonry roofs, flashings, chimneys, vents, skylights, metal joints and gutters.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Polyglass |
| Sell unit | 1 pail (2.8 gal or 5 gal) |
| Product line | PG 425 Wet & Dry Roof Cement |
| Available colors | Black |
| Available sizes | 2.8 gal, 5 gal |
| Material | Trowel-grade asphalt roof cement |
| Finish / texture | Black, heavy trowel-grade consistency |
| Intended use | Wet weather emergency repair, sealing and patching of holes and cracks in roofs |
| Application surfaces | Composition shingles, asphalt built-up roofs, metal and masonry roofs, flashings, chimneys, vents, skylights, metal joints, gutters |
| Limitations | Not recommended for use with thermoplastic or thermoset membranes |
Fit and Compatibility:
Use on composition shingles, asphalt built-up roofs, metal and masonry roofs, and around flashings, chimneys, vents, skylights, metal joints and gutters. Do not use with thermoplastic (TPO/PVC) or thermoset (EPDM) membranes; for those systems choose a compatible sealant instead.
Frequently Asked Questions (FAQ):
Q: What sizes are available?
A: PG 425 is offered in 2.8 gal and 5 gal pails, both in black.
Q: Can I apply it in the rain or standing water?
A: Yes, it is formulated for wet weather repair and contains an additive that displaces standing water to create a tight seal.
Q: Is it safe on asphalt membranes?
A: Yes, the formulation is non-destructive to asphalt-based roofing membranes.
Q: Can I use it on TPO or EPDM?
A: No, it is not recommended for use with thermoplastic or thermoset membranes.
Q: What can it repair?
A: Sealing leaks and openings around flashings, chimneys, vents, skylights, metal joints and gutters, and patching holes and cracks in shingle, built-up, metal and masonry roofs.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Keep a pail of PG 425 on the truck for storm calls, since trowel-grade cements that displace water are among the few products that seal a leak in active rain. Trowel it well into the crack and feather the edges so it does not fishmouth under shingle laps. Remember it is an emergency and flashing repair cement, not a membrane adhesive, so plan a permanent fix on thermoplastic and EPDM roofs with the right system sealant.
Asphalt roof cements contain petroleum solvents; use in well-ventilated conditions, keep away from ignition sources, and read the label before application.
Order Polyglass PG 425 Roof Cement and be ready to stop roof leaks even in standing water.
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