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Johns Manville DynaLastic 180 FR Mineral-Surfaced SBS Cap or Flashing Sheet, White, 39-3/8 in. x 32 ft. 10 in.
Regular price $121.00Orders start at $399 — combine any items to reach the minimum. Learn more
Johns Manville DynaLastic 180 FR Mineral-Surfaced SBS Cap or Flashing Sheet, White, 39-3/8 in. x 32 ft. 10 in.
Johns Manville DynaLastic 180 FR is a polyester-reinforced, mineral-granule-surfaced cap or flashing sheet for multi-ply roofing systems. This roll is 39-3/8 in. x 32 ft. 10 in. in White, and the granules are also available in Black within the product line. Its SBS-modified blend and fire-retardant additives make it a durable, flexible cap sheet for commercial roofs.
Key Features:
- Multi-ply cap or flashing: Used as a polyester-reinforced, mineral-surfaced cap or flashing sheet in a variety of multi-ply roofing systems.
- Strong reinforcement: Polyester mat with glass-scrim reinforcement delivers robust tear strength and puncture resistance.
- Wind and hail performance: The reinforced construction allows high wind performance and an excellent hail rating.
- SBS flexibility: SBS-blend elasticity and elongation and recovery properties accommodate continual expansion and contraction.
- Fire-retardant blend: The FR blend contains additional fire-retardant additives.
- Long-term adhesion: The ceramic coating promotes excellent long-term adhesion for optimal embedment in the SBS-blend sheet.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 roll, 39-3/8 in. x 32 ft. 10 in. |
| Product line | DynaLastic 180 FR |
| Material | SBS-modified asphalt sheet, polyester mat with glass-scrim reinforcement, mineral granule surface |
| Color / finish | White granule surface |
| Available colors | 2 granule colors: White (this roll) or Black |
| Dimensions | 39-3/8 in. x 32 ft. 10 in. per roll |
| Coverage per unit | Approximately 108 sq ft per roll before laps and waste |
| Intended use | Cap or flashing sheet in multi-ply (BUR and modified bitumen) roofing systems |
Coverage & How Much You Need:
Each 39-3/8 in. x 32 ft. 10 in. roll covers roughly 108 sq ft of nominal area. Deduct side and end laps per your system specification, so plan on ordering rolls based on net coverage plus a waste allowance.
Fit and Compatibility:
Designed for use in Johns Manville multi-ply roofing systems over approved base and ply sheets such as DynaBase, with compatible SBS-modified adhesives or mopping applications. Base sheets, adhesives and primers are sold separately; follow the JM system specification.
Frequently Asked Questions (FAQ):
Q: What is included with this order?
A: One roll of DynaLastic 180 FR cap or flashing sheet, 39-3/8 in. x 32 ft. 10 in., in White.
Q: Is it available in other colors?
A: Yes, the granule surface is available in White or Black; this roll is White.
Q: What makes the FR version different?
A: The FR blend contains additional fire-retardant additives.
Q: How much area does a roll cover?
A: A roll covers about 108 sq ft nominal; subtract laps and waste when estimating.
Q: Can it be used as flashing?
A: Yes, it is designed for use as either a cap sheet or a flashing sheet in multi-ply systems.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Choose DynaLastic 180 FR when the spec calls for a fire-retardant, granule-surfaced cap or flashing sheet with strong tear and puncture resistance. The polyester and glass-scrim reinforcement gives it dimensional stability, so keep rolls in the same orientation and maintain specified laps. In hot climates, White granules can help reduce surface temperatures compared with Black.
Follow the roofing system's installation method requirements and use hot-work, torch or adhesive safety practices, plus roof fall protection, during application.
Order Johns Manville DynaLastic 180 FR White cap or flashing sheet for your multi-ply roofing system.
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