Soprema Alsan Flashing

ALSAN® Flashing – Single-Component Polyurethane Waterproofing Coating

Seal Complex Details with Confidence. Durable. Flexible. Proven.

ALSAN® Flashing is a patented, single-component, polyurethane- and bitumen-based waterproofing coating designed to protect hard-to-access upstands, penetrations, and detailing areas where traditional sheet membranes are difficult to apply. Engineered by SOPREMA, this high-performance liquid-applied membrane offers seamless waterproofing, superior adhesion, and long-term durability.

Key Features:

• Single-Component Formula: No mixing required—ready to use straight from the container.
• Polyurethane & Bitumen-Based: Combines flexibility with robust waterproofing performance.
• Ideal for Complex Details: Perfect for upstands, corners, penetrations, and irregular surfaces.
• Reinforced with Polyfleece: Enhances strength and crack-bridging capability.
• Easy Application: Apply with brush or loose-laid method for fast, efficient installation.
• Durable & Weather-Resistant: Withstands harsh environmental conditions and UV exposure.

Recommended Applications:

• Flashing around roof penetrations and upstands
• Waterproofing transitions and detailing areas
• Repairs and reinforcement of vulnerable roof sections
• Integration with SOPREMA roofing systems

Technical Specs:

• Membrane Type: Liquid-applied flashing
• Material: Polyurethane with bitumen
• Reinforcement: Polyfleece
• Application Tools: Brush, loose-laid
• Packaging: Available in various container sizes

Why Choose ALSAN® Flashing?
Designed for precision waterproofing, ALSAN® Flashing offers a seamless, flexible, and highly durable solution for roofing professionals. Whether you're detailing a new roof or repairing an existing one, this product ensures long-lasting protection in the most challenging areas.