Soprema is the world’s largest manufacturer of SBS-modified bitumen roofing, with roots dating back to 1908 and a U.S. headquarters in Wadsworth, Ohio since 1993. Its product range spans SBS and APP modified bitumen membranes, liquid-applied ALSAN systems, and SENTINEL® PVC membranes, all built for commercial roofing and waterproofing durability. Available through Murphy’s for low-slope commercial jobs.
A Century-Plus of Waterproofing Innovation
Soprema traces back to 1908, when founder Charles Geisen developed a waterproof, flexible fabric by soaking jute cloth in hot bitumen. That original innovation grew into a family-owned global manufacturer, and today Soprema is the world's largest producer of SBS-modified bitumen roofing membranes.
The company opened its U.S. headquarters and first American manufacturing plant in Wadsworth, Ohio in 1993, and has continued expanding its U.S. product lineup ever since — including liquid-applied and PVC systems alongside its core modified bitumen line.
SOPRALENE® Legacy
Soprema's flagship SBS-modified bitumen membrane has been on the market since 1975 and now includes ECO3 smog-reducing granule technology.
Liquid-Applied ALSAN®
A quick-setting, single-component liquid flashing system used for penetration sealing, detail work, and maintenance applications.
SENTINEL® PVC
A full line of high-performance thermoplastic PVC membranes and accessories for roofing and waterproofing.
Product Lineup
- SOPRALENE® — SBS-modified bitumen membrane, the company's flagship product since 1975
- ALSAN® / ALSAN FLASHING® — liquid-applied roofing, waterproofing, and flashing systems
- SENTINEL® — thermoplastic PVC roof membranes and accessories
- SOPRASEAL® — self-adhesive air and vapor barrier products
- Polyiso insulation — manufactured at LEED-certified facilities
Where It Fits on the Job
Soprema is built for low-slope commercial and institutional roofing — schools, hospitals, government buildings, and commercial structures where modified bitumen's proven redundancy and durability matter most. The liquid-applied ALSAN line also covers detail and maintenance work where a torch or heat-weld application isn't practical.
Soprema's catalog spans modified bitumen, liquid-applied, PVC, and insulation product families. Confirm the specific system and stock at your branch with our counter team — products vary by location.
FAQ
Is Soprema the same as SOPRALENE?
SOPRALENE® is Soprema's flagship SBS-modified bitumen membrane product, launched in 1975. Soprema is the parent manufacturer, offering SOPRALENE alongside liquid-applied, PVC, and insulation product lines.
Does Soprema make anything besides modified bitumen?
Yes. Soprema also manufactures liquid-applied ALSAN® systems, SENTINEL® PVC membranes, self-adhesive air/vapor barriers, and polyiso insulation.
Is Soprema stocked at Murphy's?
Yes. Soprema is one of Murphy's stocked manufacturer lines. Ask our counter team which product families and quantities are on hand at your location.

















