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Johns Manville JM Coating Silicone Flashing Mastic, 2 gal, White
Regular price $235.00Orders start at $399 — combine any items to reach the minimum. Learn more
Johns Manville JM Coating Silicone Flashing Mastic, 2 gal, White
Johns Manville JM Coating Silicone Flashing is a silicone mastic for flashing and repair work on commercial roofs. Each sell unit is one 2-gallon pail in White. Use it with reinforcing fabric for repairs, or to seal common flashing conditions when working with JM Coating Silicone systems.
Key Features:
- Multi-substrate use: Designed for use over a variety of substrates for flashing and repair applications.
- Silicone durability: Silicone chemistry delivers long-term durability and performance in the field.
- High-temperature rated: Formulated for high temperature resistance on roof assemblies.
- Repair-ready: Used for repair applications in combination with a reinforcing fabric.
- System-matched: Seals common flashing conditions when using JM Coating Silicone.
- Prolonged roof life: Helps extend the service life of the existing roof system.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 pail, 2 gal |
| Product line | JM Coating Silicone |
| Available colors | White |
| Available sizes | 2 gal |
| Material | Silicone mastic |
| Dimensions | 2 gal pail |
| Intended use | Flashing and repair mastic for commercial roof systems, used with reinforcing fabric or with JM Coating Silicone |
Fit and Compatibility:
Designed to pair with JM Coating Silicone and JM liquid-applied coating systems as the flashing-grade mastic. Use with reinforcing fabric for repairs over a variety of substrates.
Frequently Asked Questions (FAQ):
Q: What is included in one order?
A: One 2-gallon pail of JM Coating Silicone Flashing mastic in White.
Q: What is this product used for?
A: It is a silicone mastic for sealing common flashing conditions with JM Coating Silicone, or for repair applications applied with a reinforcing fabric.
Q: Does it need reinforcing fabric?
A: Yes, for repair applications the manufacturer describes use with a reinforcing fabric; fabric is sold separately.
Q: What substrates can it be applied over?
A: The manufacturer states it is designed for use over a variety of substrates.
Q: How does it handle heat?
A: The manufacturer lists high temperature resistance as a product feature.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Choose this flashing-grade mastic wherever JM Coating Silicone is the field coating, since it is formulated for the same system. For repairs, embed the reinforcing fabric fully into the mastic to avoid voids and fishmouths. Silicone mastics resist UV and heat well, making them a good choice for exposed flashing details.
Follow the safety data sheet for ventilation, skin and eye protection, and safe handling when working with solvent-free silicone mastics on a roof.
Order the JM Coating Silicone Flashing 2-gallon pail to complete your silicone roof coating system.
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