Sika Sarnafil S327 PVC 80 mil: Heavy-Duty Single-Ply for Restaurant & Industrial Roofs
Published: 2026-06-22
Sika Sarnafil S327 is the premium PVC roofing membrane specification for roofs requiring chemical resistance, fire performance, and long-term durability. The 80 mil thickness provides 33% more material than the standard 60 mil specification — critical for roofs subject to foot traffic, mechanical equipment service, and chemical exposure. Sika is the largest PVC roofing manufacturer globally, and the Sarnafil brand has documented installations exceeding 30 years. The S327 formulation includes UV stabilizers, plasticizers, and biocides for long-term weatherability. Hot-air welded seams at 500-550°C create a homogeneous bond — the seam material is chemically identical to the membrane, eliminating adhesive failure as a leak source.
🛡️ Insurance & Compliance AdvisorySarnafil S327 80 mil is the heavy-duty specification for roofs exposed to chemical attack — restaurant grease exhaust, chemical plant emissions, jet fuel at airports. For insurance: PVC is self-extinguishing (inherently fire-resistant due to chlorine content). Provide the UL Class A fire rating to your commercial property insurer for potential premium reduction. For wind claims: the FM Class 1-120 rating exceeds most building code requirements. Sarnafil's hot-air welded seams are chemically homogeneous — the seam is as strong as the membrane itself, and seam failure is extremely rare when properly installed. Document seam probe test results as wind claim evidence.
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Equivalent Products & Cross-References
| Equivalent / Alternate Product | Action |
|---|---|
| Duro-Last PVC 50 mil | |
| Johns Manville PVC 60 mil | |
| FiberTite KEE PVC 60 mil |
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References & Industry Standards
- ASTM International. Standard Specifications for Single-Ply Roofing Membranes. astm.org
- FM Approvals. Factory Mutual Roofing Assembly Standards. fmapprovals.com
- UL LLC. Fire Classification of Roofing Materials. ul.com
- NRCA. The NRCA Roofing Manual. nrca.net