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Johns Manville 1-Part PermaFlash Liquid Flashing, Brown, 1 gal. or 5 gal.
Regular price $98.50Orders start at $399 — combine any items to reach the minimum. Learn more
Johns Manville 1-Part PermaFlash Liquid Flashing, Brown, 1 gal. or 5 gal.
JM 1-Part PermaFlash is a one-component, elastomeric, liquid-applied flashing made of asphalt/polyurethane resin, formulated for use with Johns Manville modified bitumen membrane products. It cures to a durable elastomeric film with no mixing required. Available in brown in 1 gal. and 5 gal. sizes.
Key Features:
- No mixing required: Single-component solution applies straight from the container with no mixing.
- Conforms easily: Easily conforms to various geometries and irregular shapes.
- Strong adhesion: Cures to a durable elastomeric film and forms exceptional bonds between modified bitumen and a variety of penetrating materials.
- UV stable: UV stable, high solids (80%) and low odor.
- Two pail sizes: Available in 1 gal. and 5 gal. units.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 pail (1 gal. or 5 gal.) |
| Product line | JM 1-Part PermaFlash Liquid Flashing |
| Available colors | Brown |
| Color / finish | Brown |
| Available sizes | 1 gal.; 5 gal. |
| Material | Asphalt/polyurethane resin |
| Type | One-part, elastomeric, liquid-applied flashing |
| Solids | High solids (80%) |
| Attributes | UV stable, low odor |
| System | Formulated for use with JM modified bitumen membrane products |
| Bonds | Modified bitumen to a variety of penetrating materials |
Coverage & How Much You Need:
Coverage per gallon is not stated; coverage depends on detail size and applied film thickness. Estimate by total linear feet of flashing details and choose 1 gal. pails for spot work or 5 gal. pails for larger jobs.
Fit and Compatibility:
Formulated for use with Johns Manville modified bitumen membrane products and bonds to a variety of penetrating materials. For two-part PMMA details on BUR and SBS systems, use JM PMMA Flashing Resin instead.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One pail of brown 1-Part PermaFlash liquid flashing, in either 1 gal. or 5 gal.
Q: Does it need mixing or a catalyst?
A: No, it is a single-component product with no mixing required.
Q: Where is it used?
A: It is a liquid-applied flashing formulated for use with JM modified bitumen membrane products, conforming to irregular shapes and penetrations.
Q: Is it UV stable?
A: Yes, it is UV stable with 80% high solids and low odor.
Q: What size should I buy?
A: Choose 1 gal. for small details and repairs, and 5 gal. for larger flashing runs.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
One-part PermaFlash saves time on small penetrations and irregular details because there is no mixing or catalyst to manage; it is ideal with JM modified bitumen systems. Detail work in coats and respect cure time before exposure to traffic or covering. For BUR and SBS two-part PMMA details, use the PMMA Flashing Resin system instead.
Liquid flashing materials are adhesive and solvent-bearing; wear gloves and eye protection, ensure ventilation, and follow the manufacturer's safety instructions.
Order JM 1-Part PermaFlash liquid flashing in 1 or 5 gallon pails for fast modified-bitumen flashing details.
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