PMMA roofing is a liquid-applied waterproofing system known for its durability
PMMA roofing is a liquid-applied waterproofing system known for its durability, fast curing time, and seamless protection. Unlike traditional membranes, PMMA fully adheres to surfaces, eliminating seams and weak points.
This system is ideal for flat roofs, balconies, terraces, and complex roof details. PMMA can be applied in cold temperatures and is resistant to UV rays, chemicals, and standing water.
Prime One Roofing installs professional PMMA roofing systems for residential and commercial properties seeking premium waterproof protection.
Below is a professional, contractor-grade description of the main SOPREMA PMMA (polymethyl methacrylate) roofing system materials, written so you can use them on proposals, specs, submittals, or your Prime One Roofing website.
These descriptions follow how SOPREMA structures its PMMA liquid-applied systems (ALSAN® line).
SOPREMA PMMA Roofing Materials
ALSAN® RS Primer
A fast-curing PMMA primer designed to promote superior adhesion between the substrate and the liquid-applied waterproofing membrane. Suitable for concrete, metal, existing bitumen, and wood substrates, ensuring a strong chemical bond and rapid project turnaround.
ALSAN® RS Reinforcement Fleece
A non-woven polyester fleece embedded into the PMMA resin to provide reinforcement, crack-bridging capability, and uniform membrane thickness. Essential for system durability and long-term waterproofing performance.
ALSAN® RS Base Resin
A high-performance PMMA resin used as the primary waterproofing layer. It fully encapsulates the reinforcement fleece, creating a seamless, flexible, and fully adhered membrane resistant to cracking, standing water, and structural movement.
ALSAN® RS Flashing Resin
A thixotropic (non-sag) PMMA resin formulated specifically for vertical and detailed areas such as parapet walls, curbs, penetrations, drains, and transitions. Allows precise application on complex details while maintaining full waterproofing integrity.
ALSAN® RS Catalyst (Hardener)
A proprietary powder catalyst added to PMMA resins to initiate rapid polymerization. Allows controlled curing times even in low temperatures, enabling year-round installation and minimal downtime.
ALSAN® RS Top Coat
A UV-resistant PMMA protective layer applied over the base membrane. Enhances weather resistance, color stability, and mechanical durability while providing a clean, finished appearance.
ALSAN® RS Aggregate / Quartz Sand
Broadcast into the wet top coat to create slip resistance and mechanical protection. Often used for walkways, maintenance paths, or areas requiring additional durability and traction.
ALSAN® RS Detailing Resin
A highly workable PMMA resin designed for intricate detailing and difficult geometries. Ideal for sealing joints, seams, fasteners, and irregular penetrations where precision waterproofing is required.
ALSAN® RS Wearing Course (Traffic Grade)
A reinforced PMMA system designed to withstand foot traffic and light service loads. Commonly used on balconies, terraces, and maintenance walkways where waterproofing and durability are critical.
ALSAN® RS UV Finish
A pigmented, UV-stable PMMA finish coat that protects the membrane from solar degradation. Available in multiple colors to meet aesthetic or design requirements while extending system lifespan.
ALSAN® RS Cold-Applied Waterproofing System
A fully cold-applied, flame-free PMMA roofing solution that cures rapidly and forms a seamless membrane. Ideal for occupied buildings, sensitive environments, and complex roof geometries.
Why SOPREMA PMMA Systems Are Used
- Seamless & fully adhered
- Rapid curing (30–60 minutes)
- Excellent crack-bridging
- UV, chemical & weather resistant
- Ideal for complex details & restorations
- Long service life with minimal maintenance
