Polyglass Elastoflex V SBS Modified Bitumen Base Sheet, 39-3/8 in. x 49 ft 2 in., Black - image 1

Polyglass Elastoflex V SBS Modified Bitumen Base Sheet, 39-3/8 in. x 49 ft 2 in., Black

Regular price $130.00

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Polyglass Elastoflex V SBS Modified Bitumen Base Sheet, 39-3/8 in. x 49 ft 2 in., Black


Polyglass Elastoflex V is a fiberglass-reinforced SBS modified bitumen base sheet with a sand surface, black, sold in rolls 39-3/8 in. x 49 ft 2 in. Available with a sand back for hot mop or cold process, or polyethylene burn-off film for heat weld applications.


Key Features:

  • SBS modified: A high-quality Styrene-Butadiene-Styrene (SBS) modified bitumen roofing membrane.
  • Fiberglass reinforced: Superior fiberglass mat reinforcement provides exceptional dimensional stability and puncture resistance.
  • Long-term weathering: The proprietary SBS compound offers exceptional long-term weathering performance.
  • Flexible application: Sand back suits hot mop or cold process; polyethylene burn-off film suits heat weld applications.
  • Warrantable assembly: Can be warranted as part of an approved Polyglass warranted roof assembly.
  • Broad market use: Manufactured for commercial, industrial, and residential markets.

Specifications Table:

Specification Details
Brand Polyglass
Sell unit 1 roll, 39-3/8 in. x 49 ft 2 in.
Product line Elastoflex V SBS modified bitumen base sheet
Available colors Black
Available sizes 39-3/8 in. x 49 ft 2 in.
Dimensions 39-3/8 in. x 49 ft 2 in. per roll
Material SBS modified bitumen membrane, fiberglass reinforced
Finish / texture Sand surface; sand back (hot mop/cold process) or polyethylene burn-off film (heat weld)
Reinforcement Superior fiberglass mat
Performance Exceptional dimensional stability and puncture resistance
Markets Commercial, industrial, and residential
Warranty Can be warranted as part of an approved Polyglass warranted roof assembly

Coverage & How Much You Need:

One roll measures 39-3/8 in. wide by 49 ft 2 in. long, giving roughly 160 sq. ft. per roll before laps. Size base-sheet jobs by counting rolls against roof area and subtracting side and end laps required by the specified application method.

Fit and Compatibility:

Used as a base sheet within modified bitumen roof assemblies; pair with compatible Polyglass interply and cap sheets, and can be included in an approved Polyglass warranted roof assembly. Application method depends on the sand-back or burn-off film variant.


Frequently Asked Questions (FAQ):

Q: What is included in one roll?
A: One black roll of Elastoflex V base sheet measuring 39-3/8 in. x 49 ft 2 in.


Q: What application methods does it support?
A: The sand-back version is designed for hot mop or cold process, while the polyethylene burn-off film version is designed for heat weld applications.


Q: How much does one roll cover?
A: Each roll is about 160 sq. ft. before laps; deduct side and end laps when calculating coverage.


Q: Why choose SBS modified bitumen?
A: The proprietary SBS compound with fiberglass reinforcement delivers exceptional dimensional stability, puncture resistance, and long-term weathering.


Q: Can it be part of a warrantied roof?
A: Yes, it can be warranted as part of an approved Polyglass warranted roof assembly.


Q: Where is it used?
A: It is manufactured for commercial, industrial, and residential markets as a base sheet in modified bitumen systems.


Expert Verdict — Reviewed by the SuperArbor Pro Desk

Elastoflex V is a dependable base sheet for SBS-modified assemblies: specify the sand-back version for hot mop or cold process crews and the burn-off film version for torch crews. Roll it out relaxed and straight, and maintain the laps your system specification requires to keep the assembly warrantable. Its fiberglass reinforcement helps the sheet hold dimension on hot decks, a real advantage over organic base felts.

Hot mop and heat weld installation involve open flame and hot bitumen: use fire watch, protective clothing, and follow manufacturer and fire code requirements.


Order the Polyglass Elastoflex V SBS base sheet roll for a dimensionally stable modified bitumen roof assembly.

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All orders are reviewed before fulfillment. You are not charged until your order is approved and ready to ship — and you may cancel at any time before that at no cost.

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