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RM Lucas #777 Rubberized Flashing Cement, Black, 3-Gal or 5-Gal Pail
Regular price $89.00Orders start at $399 — combine any items to reach the minimum. Learn more
RM Lucas #777 Rubberized Flashing Cement, Black, 3-Gal or 5-Gal Pail
Lucas #777 is a premium grade, trowel-applied rubberized flashing cement for installing, repairing or rebuilding roof flashings at parapet walls, gravel stops, stacks, vents and monitors. Made from refined asphalt, SBS polymers, solvents, reinforcing fibers and a water displacing additive, it applies in wet or dry, all-weather conditions. Available in 3-gallon and 5-gallon pails.
Key Features:
- All-Weather Application: High quality polymer modified cement for repairing asphalt and modified bitumen roofs in wet or dry conditions and all weather.
- SBS Polymer Modified: Manufactured from refined asphalt, SBS polymers, petroleum solvents, reinforcing fibers and a special water displacing additive.
- Trowel-Applied: Applies fast and smooth and breaks cleanly off the trowel without stringing.
- Fabric Reinforceable: May be used with polyester fabric reinforcement for permanent repairs to asphalt and modified bitumen roofs.
- Two Pail Sizes: Available in 3-gallon and 5-gallon pails.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | RM Lucas |
| Sell unit | 1 pail (3 gal or 5 gal) |
| Product line | Lucas #777 Rubberized Flashing Cement |
| Available colors | Black |
| Available sizes | 3 gal, 5 gal |
| Material | Refined asphalt, SBS polymers, petroleum solvents, reinforcing fibers, water displacing additive |
| Color / finish | Black |
| Dimensions | 3-gal or 5-gal pail |
| Application method | Trowel-applied |
| Intended use | Install, repair or rebuild roof flashings at parapet walls, gravel stops, stacks, vents, monitors and similar applications |
Coverage & How Much You Need:
Coverage depends on flashing size and film thickness and is not stated in the sources; estimate by the linear feet of flashing details to be masticed and embedded with fabric.
Fit and Compatibility:
For use on asphalt and modified bitumen roofs, and can be paired with polyester fabric reinforcement for permanent repairs.
Frequently Asked Questions (FAQ):
Q: What sizes does it come in?
A: It is available in 3-gallon and 5-gallon pails.
Q: Can it be applied in wet weather?
A: Yes, it is formulated for wet or dry application in all weather conditions.
Q: Can it be used with fabric?
A: Yes, it may be used with polyester fabric reinforcement for permanent repairs to asphalt and modified bitumen roofs.
Q: Where is it used?
A: At parapet walls, gravel stops, stacks, vents, monitors and similar flashing details.
Q: How does it handle on the trowel?
A: It applies fast and smooth and breaks cleanly off the trowel without stringing.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Use #777 with embedded polyester mesh at flashings that see movement, embedding the fabric fully and feathering the edges. Its water-displacing formulation makes it a go-to for emergency and all-weather repairs on asphalt and mod-bit roofs. For large flashing rebuilds, choose the 5-gallon pail to keep material consistent across the job.
Solvent-based asphalt cements are flammable; avoid ignition sources and follow label safety precautions during use.
Get all-weather flashing repairs with RM Lucas #777 Rubberized Flashing Cement in 3- or 5-gallon pails.
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