VulcaSeal G40 Fiberglass (SBS Modified) – 2 sq.


39 3/8” x 66’


216 sq. ft.

Rolls per Pallet:

30 rolls per

Pallets per Truck/Truck load:

19 pallets per truck
570 rolls per truck load


  • ASTM D-6757-02
  • ASTM D-4601-98
  • UL™Type II Glass Base Sheet
  • UL ER 18554-01


Keep on end and off of the ground. Do not double stack.

Product Description

VulcaSeal G40 Fiberglass (Modified) is world-class fiberglass based modified asphalt underlayment that provides the best in protection for your home and family under concrete tile, clay tile, or metal roofing. The coating material is impregnated into the Fiberglass sheeting providing it the highest standards in roofing for strength, durability, and longevity. Specially designed, patented, and manufactured by Fontana Paper Mills, Inc., VulcaSeal G40 is the most reliable and optimal way to make your roof last and your home dry.

Recommended Application

For use under CONCRETE/CLAY TILE or METAL roofing.

Dry In Exposure:

6 Months

10 Year  Single Layer Warranty
20 Year Double Layer Warranty
Manufacture Material Defect Warranty