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Johns Manville PermaFlash Complete Kit - Bituminous Flashing System with Cement, Scrim and Primer
Regular price $724.33Johns Manville PermaFlash Complete Kit - Bituminous Flashing System with Cement, Scrim and Primer
The Johns Manville PermaFlash Complete Kit contains everything needed for the PermaFlash Bituminous Flashing System: four 28.7-oz cartridges of MBR flashing cement, one 12 in. x 20 ft. scrim roll, and one 32-oz bottle of primer. Coverage is approximately 20 sq. ft. or about ten penetrations per kit.
Key Features:
- All-in-one kit: Each kit includes 4 cartridges (28.7 oz each), 1 roll of 12 in. w x 20 ft. scrim, and 1 32-oz bottle of primer.
- 20 sq ft coverage: Coverage rate is approximately 20 square feet or approximately ten penetrations per kit.
- Elastomeric flashing: MBR flashing cement cures to a durable, elastomeric waterproofing film.
- Guarantee eligible: Flashings flashed with PermaFlash are eligible for inclusion in the JM Peak Advantage Guarantee on JM guaranteed systems.
- Bituminous systems: Specifically formulated for use in bituminous roofing systems.
- Flexible reinforcement: The stitchbonded polyester scrim provides flexible reinforcement within the flashing membrane.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 complete kit (4 cartridges, 1 scrim roll, 1 primer bottle) |
| Product line | PermaFlash Bituminous Flashing System |
| Coverage per unit | Approx. 20 sq. ft. or approx. 10 penetrations per kit |
| Dimensions | Scrim roll: 12 in. w x 20 ft. |
| Pack quantity | 4 cartridges, 1 scrim roll, 1 primer bottle per kit |
| Weight | 14 lb per kit |
| Intended use | Bituminous flashing for penetrations, drains and vertical surfaces on JM guaranteed systems |
| Manufacturer warranty summary | Flashings eligible for inclusion in the JM Peak Advantage Guarantee when flashed with the PermaFlash Bituminous Flashing System |
Coverage & How Much You Need:
One kit covers approximately 20 square feet of flashing or approximately ten penetrations. Size the job by counting penetrations and measuring vertical flashing areas, then order enough kits to cover the total.
Fit and Compatibility:
Formulated for use with the PermaFlash Bituminous Flashing System (PermaFlash Primer, MBR Flashing Cement, PermaFlash Scrim) in Johns Manville bituminous roofing systems. On JM guaranteed systems, PermaFlash flashing is eligible for the JM Peak Advantage Guarantee.
Frequently Asked Questions (FAQ):
Q: What is included in the kit?
A: Four 28.7-oz cartridges of flashing cement, one 12 in. x 20 ft. scrim roll, and one 32-oz bottle of primer.
Q: How much will one kit cover?
A: Approximately 20 square feet or approximately ten penetrations.
Q: Can it be used on JM guaranteed roofs?
A: Yes - flashings flashed with the PermaFlash Bituminous Flashing System are eligible for the JM Peak Advantage Guarantee.
Q: What is the primer for?
A: The primer improves adhesion of MBR flashing cement to nonporous substrates.
Q: Is this for single ply roofs?
A: The system is specifically formulated for bituminous roofing systems; consult JM documentation for other uses.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
PermaFlash is an integrated system: primer first on nonporous substrates, then cement and scrim built up in layers per JM's flashing detail instructions. Work within the cement's working time (about 30 minutes at 77°F) and plan for it to be rainproof after roughly 4 hours at that temperature. The kit format is convenient for detailing penetrations, drains, and vertical surfaces without purchasing full pails.
Wear rubber gloves during application and cleanup, use mineral spirits for tool cleanup per manufacturer warnings, and consult the Safety Data Sheet before use.
Get the Johns Manville PermaFlash Complete Kit for guaranteed-system bituminous flashing in one convenient package.
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