Product Overview

Sarnacol-2152 is a two-component, solvent-free polyurethane adhesive for bonding Sarnafil roof membranes to the substrate without heat or open flame. Comprising a filled polyol component and an isocyanate hardener, it cures to a tough bond and is applied cold, which simplifies safety on site. Its thixotropic consistency makes it controllable during placement, and it can often be used without a primer while still preventing lateral water migration between the structure and the membrane. It is used to bond Sarnafil G 476 (unexposed) and Sarnafil G 410 L Felt (exposed) membranes to concrete, cement mortar, plywood, timber boards and cross-laminated timber (CLT) panels. Space Arc Engineering, an authorized Sika distributor in India, supplies Sarnacol-2152 for adhered single-ply roofing systems.

Features & Benefits

• Solvent-free, cold-applied bonding with no heat or open flame needed on the roof
• Thixotropic consistency gives good control during application
• Often usable without a separate primer, streamlining the build-up
• Helps prevent lateral water migration between the deck and the membrane
• Suitable for modern substrates including plywood, timber and CLT panels
• Pre-proportioned two-component set for consistent mixed performance

Technical Highlights

Applications

• Cold, flame-free bonding of Sarnafil membranes over concrete decks on commercial roofs
• Adhered roofing on cross-laminated timber (CLT) decks in modern timber buildings
• Membrane bonding over plywood and timber-board roofs on residential projects
• Roof waterproofing on cement-mortar screeds in industrial and warehouse buildings
• Adhered single-ply systems where hot works are restricted on infrastructure sites