Envirotuff™ ACC Weathering Membrane
Restore.Protect.Extend.
One peel-and-stick membrane that reflects heat, seals out water and fights corrosion — engineered to extend the life of your existing metal roof. No torch. No tear-off.
One roll. Three jobs. Zero hot work.
Aging metal roofs fail in predictable ways: they bake in the sun, leak at seams and fasteners, and corrode. ACC tackles all three in a single self-adhered layer your crews already know how to install.
Reflects heat
A pure aluminum foil layer bounces solar energy away — cutting roof heat gain and the A/C load in the space below.
Seals out water
13–15 mil high-performance butyl bonds continuously over seams, fasteners, gutters and flashings.
Stops corrosion
An anti-corrosion outer coating stands up to salt spray, acid rain and pH 2–13 — coastal, industrial and agricultural sites.
No torch. No tear-off.
Peel the release film, press, bond. Standard crews install over the existing roof — faster, safer, and no hot-work permit.
The proof is on the roof.
Same roof. Same moment. A thermal camera on a metal-roofed logistics warehouse shows the difference ACC makes — the membrane is the only variable.
- Bare metal measured 167 °F; the ACC section measured 97 °F1
- Up to 13 °F cooler indoor air below an ACC-covered roof2
- Independent U.S. lab: initial solar reflectance 0.843
Side-by-side trial, Hangzhou, China, August 2023.1
Same warehouse. Before and after.
ACC goes on over the existing metal roof — no tear-off, no disposal, no disruption to the operation underneath.
Before
After ACCLogistics warehouse, Hangzhou, China — installed over the existing metal roof.
Six layers. One roll.
Reflective foil, reinforced non-woven and high-adhesion butyl, bonded into a single self-adhesive sheet.
- Anti-corrosion coatingWeather-resistant outer face — UV, acid rain and salt spray protection
- Pure aluminum foilThe cool-roof layer — high solar reflectance
- PET filmDimensional stability and tear resistance
- PE tie layerBonds the film to the reinforcement
- PET non-wovenTensile reinforcement
- Self-adhesive butyl13–15 mil peel-and-stick bond, protected by a release film
Built for the roofs that take a beating.
Where do you fit in?
Roofing contractors
Add a fast, no-torch restoration product to your line. Training, samples and job support included.
Become an installer →Building owners
Extend the life of a tired metal roof without the cost and disruption of a full replacement.
Talk to our team →Distributors
A differentiated line for contractor customers in metal, industrial and coastal restoration.
Stock ACC →Architects & specifiers
Data sheet, test data and installation guide for specification and project review.
Request documents →See it. Peel it. Test it on your roof.
Request a free ACC sample and technical data pack — shipped to your office or job site.
- Side-by-side metal roof trial, logistics warehouse, Hangzhou, China, August 2023: roof surface 74.8 °C (167 °F) on bare metal vs. 36.2 °C (97 °F) with ACC, measured by thermal camera at the same moment. Results vary with climate, substrate and building.
- Grain warehouse with metal roof, Inner Mongolia, China, July 2025: maximum indoor air temperature difference 7.1 °C (12.8 °F). Results vary with climate, insulation, ventilation and building use.
- Independent U.S. laboratory testing (ACE Laboratories, Ravenna, Ohio, July 2026) to ASTM C1549 and ASTM C1371 on two production batches: initial solar reflectance 0.83–0.84, SRI 92–95. These are initial lab values, not a Cool Roof Rating Council (CRRC) rating. CRRC rating is in progress.
- Manufacturer data — San Miguel Yamamura Woven Products, ACC WF501C-BU specification sheet and product manual. Test methods as stated. U.S. third-party listings are in progress.