Fastwarm® 1L Primer

• Enhanced Adhesion- Improves the bond between substrate and subsequent layers, crucial for a stable heating system.
• Porosity Reduction- Seals the substrate to prevent air bubbles and prolongs levelling compound flow time for a smooth finish.
• Versatile Application- Works on various substrates including calcium sulphate screeds, plaster, timber, brick, and blockwork.

The Fastwarm Acrylic-Based Primer is a moisture-tolerant, water-based primer designed to enhance adhesion and provide a stable base for underfloor heating installations. Suitable for both porous and non-porous surfaces, it ensures optimal bonding of adhesives or levelling compounds for a durable, efficient heating system. Application Tips: For porous surfaces, dilute the primer before application (first coat: 3 parts water to 1 part primer; second coat: 1:1). Allow each coat to dry fully before applying the next—typically 1–2 hours, depending on environmental conditions. This primer is essential for preparing surfaces to ensure long-lasting, efficient underfloor heating installations.