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Johns Manville Low-VOC PermaFlash Primer, 32 oz Bottle - Clear Solvent-Based Flashing Primer
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Johns Manville Low-VOC PermaFlash Primer, 32 oz Bottle - Clear Solvent-Based Flashing Primer
Johns Manville Low-VOC PermaFlash Primer is a one-part, solvent-based clear primer that improves adhesion of MBR flashing cement to nonporous substrates. One bottle is 32 oz, sold individually; it is a component of the PermaFlash bituminous flashing system.
Key Features:
- Improves adhesion: Improves adhesion of MBR flashing cement to nonporous substrates.
- Low-VOC formula: Low-VOC, high-solids formulation with 0 g/L maximum VOC for the primer.
- Clear finish: Primer dries clear.
- 24-month shelf life: Shelf life of 24 months from manufacture date when stored unopened in a clean, dry indoor environment.
- System component: Part of the integrated PermaFlash flashing system with MBR flashing cement and PermaFlash scrim.
- Wide temperature storage: Store between 20°F and 90°F, protected from freezing.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Manufacturer model | 70003232 |
| Sell unit | 1 bottle, 32 oz |
| Product line | PermaFlash System |
| Profile / style | One-part solvent-based primer (liquid applied) |
| Color | Clear |
| Dimensions | 32 oz (946 ml) bottle |
| Coverage per unit | Approx. 150 sq. ft. per 32 oz bottle at proper coverage rate |
| Material | Solvent-based primer |
| Weight | 3.6 lb per bottle |
| Approvals | 0 g/L maximum VOC (primer - low VOC) |
| Intended use | Priming nonporous substrates before MBR flashing cement in the PermaFlash flashing system |
Coverage & How Much You Need:
One 32 oz bottle covers approximately 150 sq. ft. Do not over-apply - applying too much primer results in less adhesion than if no primer were used; at proper coverage, evaporation should occur within a few seconds.
Fit and Compatibility:
Use with the PermaFlash system: MBR flashing cement (base and activator) and PermaFlash scrim, on bituminous roofing assemblies. Apply to clean, dry nonporous substrates before flashing cement application.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One 32 oz (946 ml) bottle of Low-VOC PermaFlash Primer.
Q: How much area does one bottle cover?
A: Approximately 150 sq. ft. at the proper coverage rate.
Q: Why use a primer?
A: It improves adhesion of MBR flashing cement to nonporous substrates.
Q: How should I store it?
A: Store unopened in a clean, dry indoor space between 20°F and 90°F, protected from freezing; shelf life is 24 months from manufacture date.
Q: How do I clean up?
A: Use mineral spirits to clean tools immediately after work, wearing rubber gloves and following the manufacturer's solvent warnings.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Apply PermaFlash Primer thinly and evenly - over-application actually reduces adhesion, so less is more; flash-off should take only seconds. Prime nonporous substrates before applying MBR flashing cement and scrim, and let conditions dictate timing since coverage and dry times vary with substrate and temperature. Keep it as part of a complete PermaFlash kit for penetrations and vertical flashing details on bituminous systems.
Solvent-based product - consult the Safety Data Sheet before use, ensure ventilation, and wear rubber gloves during application and cleanup.
Pick up the Johns Manville Low-VOC PermaFlash Primer 32 oz bottle to prep nonporous surfaces for reliable flashing adhesion.
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