Which Adhesive Do I Need for Underfloor Heating?

Selecting the right adhesive ensures lasting strength and flexibility for your underfloor heating installation. Our professional-grade options provide reliable bonding whether you’re fixing insulation panels, ThermRite boards or tiling directly onto your subfloor.

• ProFlex SP – A rapid-setting, flexible tile adhesive ideal for bonding insulation boards in both wall and floor applications. It can also be used as a high-quality tile adhesive directly over underfloor heating panels or standard subfloors, making it a versatile all-round solution.
• ProFlex S2 (Fibre Reinforced) – A premium, single-part flexible adhesive enhanced with fibre reinforcement for extra strength. Designed for installations such as ThermRite PRO panels, it’s perfect for both bonding down our ThermRite PRO panels as well as tiling directly onto all of our heating boards, or conventional subfloors where durability and flexibility are key.
• ThermRite Spray Adhesive – A fast and convenient aerosol adhesive developed specifically for fixing ThermRite PRO insulation boards to the subfloor. It offers instant grab and excellent coverage, saving time during installation.

How to choose the right adhesive:

• For bonding down or tiling over standard underfloor heating boards – choose ProFlex SP.
• For bonding down or tiling over ThermRite PRO boards or high-performance systems – use ProFlex S2.
• Or for a fast installation of ThermRite PRO boards to subfloors – opt for ThermRite Spray Adhesive.

Each adhesive in our range is formulated for compatibility with heated floors, ensuring long-term stability, resistance to temperature cycles and strong adhesion for every underfloor heating system.