Sarnafil is a PVC membrane line with roots in Swiss roofing technology, now operating under the broader Sika corporate umbrella following Sika's acquisition of the Sarnafil business. It's a thermoplastic single-ply membrane, and we spec it on projects where PVC's chemical and grease resistance is the deciding factor.
Sarnafil produces PVC membrane across multiple product families, including G410 and S327 lines that differ in reinforcement, thickness, and intended application method. The membranes use hot-air welding to fuse seams, consistent with PVC and TPO membrane technology generally, forming a continuous bonded seam rather than relying on tape or adhesive.
Color options run through the standard reflective white and light gray range used to manage solar heat gain, relevant to our long, humid summer stretch where rooftop surface temperature directly affects cooling load on the building below.
Like other PVC membranes, Sarnafil's chemistry resists grease, oils, and certain chemical exposures better than TPO or EPDM, which is the primary reason we'd reach for PVC over other single-ply options on a roof near restaurant hood exhaust, industrial process venting, or other chemically exposed conditions common at manufacturing sites and food-service buildings around Evansville.
Beyond sheet membrane, Sika also produces Decothane, a liquid-applied waterproofing system used for detail work, complex flashing geometry, and situations where a sheet membrane isn't practical to install cleanly. It's a different application category from sheet membrane roofing but comes from the same manufacturer and gets used on detail areas of some of the projects where Sarnafil sheet membrane covers the main field.
Sarnafil PVC installs using the same general methods as other PVC membrane, mechanically attached, fully adhered, or in some configurations, induction-welded to reduce visible fastener patterns. Welding quality is the single biggest factor in long-term seam performance regardless of which manufacturer's PVC sheet is used, which is why we probe-test every seam rather than relying on visual inspection alone.
PVC membrane performance across major manufacturers is broadly comparable at the chemistry level, with differences showing up more in reinforcement options, sheet width, warranty terms, and specific accessory compatibility. We evaluate Sarnafil against other PVC lines the same way we would any manufacturer comparison, based on project specifics rather than brand preference.
Sika Sarnafil PVC membrane moves through the same regional distributor network as other major single-ply manufacturers, with standard G410 and S327 product generally available on manageable lead times for planned reroofing projects. As with any PVC or TPO membrane, timing a material order around our storm season matters, since a roof with an exposed deck mid-project is at far more risk from a sudden thunderstorm cell than a completed one.
Sika's system warranties on Sarnafil projects require installation by a contractor meeting the manufacturer's current training and certification standards for that product line, consistent with how Carlisle, GAF, Holcim Elevate, Johns Manville, and Versico all structure their own commercial warranty programs. Warranty length and specific coverage terms depend on the product configuration and certification tier involved in a given project.
Because Sarnafil operates as part of the broader Sika chemical and building materials company, some Sarnafil projects also draw on Sika's separate sealant, adhesive, and waterproofing product lines for detail work beyond the roofing membrane itself, particularly on buildings where roof waterproofing connects to below-grade or wall waterproofing scopes handled by the same manufacturer's broader product catalog.
We compare Sarnafil's specific reinforcement and thickness options against other PVC manufacturers on every project where PVC is the right membrane category, since the decision between PVC brands usually comes down to project-specific details rather than a broad performance gap between manufacturers. Sheet width options also factor into that comparison, since wider sheet generally means fewer field seams on a large roof, which is a real consideration on bigger industrial and institutional projects around the area. Reinforcement scrim weight and edge detailing hardware round out the rest of the comparison, particularly on roofs with a lot of parapet wall or coping transitions to flash.
Sarnafil is a specific manufacturer's PVC membrane product line; PVC roofing as a category is produced by several major manufacturers with generally similar base chemistry and different specific formulations and features.
PVC membrane generally costs more per square than TPO, reflecting the more complex chemistry and, in exposed-chemical applications, the added performance that justifies the premium.
It's used for liquid-applied detail work at complex penetrations, transitions, and geometries where sheet membrane installation is impractical, rather than as a main-field roofing material.
General PVC maintenance principles apply across brands, seam inspection, flashing checks, and keeping the surface free of standing chemical residue near exhaust sources.
Sika is a Swiss multinational company with manufacturing and operations across multiple countries, including facilities in the United States supplying the North American market.