Henry 208 Wet Patch Roof Cement (10.1 oz cartridge) Review (2026)
By The DIYPicks Team · Updated July 2026
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- Roof leaks
- Flashing repair
- Gutter seam sealing
The classic emergency roof and gutter patch that sticks to wet surfaces. Ideal for stopping a leak now at a flashing, seam, or crack; plan a permanent repair later.
Pros
- Wet-surface formula bonds even when the leak area is still damp, so you can patch mid-storm
- Wide -10 to 120 F application window makes it usable in cold-weather emergency repairs
- Thick asphalt body fills cracked seams, flashing joints, and gutter laps that caulk runs out of
Cons
- Black and not paintable, so it stands out on light shingles or metal
- Messy, stringy asphalt is hard to tool cleanly and stains tools, hands, and clothing
- A stopgap on active leaks, not a long-term substitute for proper flashing or shingle replacement
Specifications
| Type | Asphalt-based trowel/gun roof cement |
|---|---|
| Expansion | N/A (troweled paste) |
| Cure | Skins in hours, fully sets over days depending on thickness |
| Paintable | No (black asphalt) |
| Use | Roof leaks, flashings, seams; apply -10 to 120 F |
| Standard | Meets ASTM D-4586, Type I |