Skip to content 
Residential & Commercial
Roofing Supplies
For homeowners and businesses in and around the San Bernardino County, CA, Fontana Paper Mills provides the highest quality asphalt-based roofing underlayment in the industry. We proudly stand behind our exceptional roofing supply materials, knowing that we manufacture products utilizing only the most technologically advanced equipment and methods. Trust Fontana Paper Mills to be the only roofing supply store that you’ll ever need.
VulcaSeal Fire Rated G40 6% SBS modified
Roof Underlayment
VulcaSeal Fire Rated G40 is a 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. It is a critical component of a class A fire rated system.
VulcaSeal G40
Fiberglass
Roof Underlayment
As a fiberglass-based, modified asphalt underlayment, this superior product delivers the ultimate protection for your home or business. Whether you own metal, clay, or concrete roofing, this underlayment solution meets the highest roofing standards for strength, durability, and longevity.
VulcaSeal
M40 6% Plus
Roof Underlayment
This multipurpose underlayment possesses an organic core with an SBS-modified and asphalt-saturated coating. It also offers a flexible, high-grip surface that makes installation easy, and roofers experience fewer product breaks. This solution provides availability, affordability, and durability.
VulcaSeal
Organic Base 40#
Roof Underlayment
Homeowners and businesses appreciate this high-quality roofing product. Ideal for metal, clay, or concrete roofing, this underlayment consists of an asphalt-saturated and SBS-modified coating manufactured from recycled paper. It works well as a built-up roofing (BUR) base sheet.
Superior Warranty Protection
Among roofing distributors, no other manufacturer delivers better warranty coverage than Fontana Paper Mills. We offer a 10 or 20-year warranty on our most widely available products, including VulcaSeal Fire Rated G40 6% SBS modified, VulcaSeal M40 6%, VulcaSeal Organic Base 40#, and VulcaSeal ASTM 30#. To qualify for protection when installing a concrete or clay tile roofing system, installation must meet the latest standards set forth by the Tile Roofing Institute (TRI) in its updated Installation Manual.
Manufacturing High-Grade Roofing Underlayment Materials
For over 30 years, Fontana Paper Mills has offered exceptional asphalt-based underlayment for homeowners and businesses nationwide. We take pride in delivering unsurpassed customer service by consistently demonstrating unrivaled transparency, accessibility, and honesty in all our dealings. Homeowners and businesses depend on us to provide the ideal permanent underlayment solution. Discover how Fontana Paper Mills can assist you!
Areas We Serve in the Southwest
Fontana Paper Mills premium roofing underlayments are represented by over 150 unique distribution companies to serve our diverse and widespread customer base!
- California
- Arizona
- Nevada
- New Mexico
