Henry 208 Wet Patch Roof Cement (10.1 oz cartridge) Review (2026)
By Nate Sawyer, Editor · Updated July 2026
DIYPicks is reader-supported. As an Amazon Associate and affiliate of home-improvement retailers, we may earn a commission when you buy through links on our site — at no extra cost to you. This never affects our recommendations.
- Roof leaks
- Flashing repair
- Gutter seam sealing
An asphalt-based roof cement whose wet-surface formula bonds even when the leak area is still damp, so you can patch mid-storm at flashings and seams. A wide -10 to 120F window suits cold repairs, and the thick body fills cracks caulk runs out of. Downsides: it is black and not paintable, messy to tool, and a stopgap, not a permanent fix.
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 |