When it comes to protecting a home, the most critical defense is often what lies directly beneath the surface. STINGER® EXO Synthetic Underlayment is engineered to redefine roofing protection, offering a high-performance moisture barrier designed to repel water and safeguard the roof deck from penetration.
Whether you are a contractor looking for installation efficiency or a homeowner seeking long-term peace of mind, the EXO line provides a suite of solutions tailored to every project’s needs.
Engineered for Extreme Performance
The foundation of the EXO line’s reliability is its rigorous testing and adherence to industry-leading standards. Every product in the EXO family is tested and approved to withstand winds up to 180 mph when combined with STINGER collated cap fasteners. This makes them an ideal choice for high-wind areas and projects requiring specialized certifications.
Applicable standards and codes for EXO underlayments include:
- Intertek CCRR-0504
- ASTM E108 (Class A) fire rating
- Florida Product Approved (FL42439)
- Miami-Dade County Approved
- TDI Listed and FORTIFIED Roof compatible
The EXO Lineup: A Solution for Every Roof
STINGER offers a range of underlayments, each designed with specific durability and warranty milestones in mind. All EXO products are approved for use under both shingle and metal roofs.
EXO25 and EXO25 FIT™: The Versatile Essentials
For standard residential applications, EXO25 offers a lightweight yet durable 95 GSM fabric with a 25-year limited warranty.
- EXO25 FIT™: This unique half-sized roll (24 inches wide) is specifically designed for starting and finishing double-layer roof decks. It eliminates the need for field-cutting full-sized rolls, reducing waste and labor on-site.
EXO35: Enhanced Strength
Stepping up in durability, EXO35 features a heavier 110 GSM fabric and an increased tensile strength of 120 lb (MD). This product is backed by a 35-year limited warranty, providing an extra layer of security for mid-range projects.
EXO50: The Ultimate Protection
For those demanding the highest level of performance, EXO50 delivers a robust 155 GSM fabric and a 50-year limited warranty. With a tensile strength of 170 lb (MD), it is built to endure the toughest environments and provide half a century of protection.
Safety and Efficiency on the Job Site
EXO underlayments are not just built for the elements; they are built for the crew. Every roll is designed with features to speed up installation and improve safety:
- Improved Traction: A proprietary slip-resistant coating on the backside combined with a spunbond non-woven walking surface ensures better traction and walkability for installers.
- Installation Speed: Preprinted fastening patterns and overlap lines allow for faster, more accurate installation.
- UV Resistance: All EXO products can withstand UV exposure for up to 6 months, offering flexibility in scheduling the final roof installation.
- Co-Branding: Contractors can even take advantage of co-branding opportunities, featuring their own 40” x 24” logo on the underlayment.
The Best Practice: STINGER Cap Systems
To achieve the full 180 mph wind-rated moisture barrier, we recommend using our specialized cap systems. Utilizing the CN100B Cap Nailer, CS150B Cap Stapler, or CH38-2/CH38A Cap Hammers with NailPac® or StaplePac® is considered the best practice for installing STINGER EXO underlayments.
By choosing STINGER EXO Synthetic Underlayment, you aren’t just covering a roof—you are investing in a tested, proven system that protects what you build for decades to come.