One-component polyurethane waterproofing membrane for roofs.

Application of SpECtite PUFlex
Surface Preparation:
Surfaces must be dry and free from oil, dust, dirt, grease, and loose materials. The substrate should be firm; in case of gaps and cracks, fill with suitable polysulphide sealant and ensure the surface is level.

Substrate Priming:
In most cases, the substrate should be primed with either SpECtite PUFlex Primer or SpECtite HP600 Primer. SpECtite PUFlex can be applied once the primer becomes tack-free. For detailed information on tack-free and inter-coating times, please refer to the technical data sheet of each primer.

Application Instructions:
Stir well before use. Do not apply if rain is expected within 24 hours. Apply the material using a brush or roller. A second coat is applied at right angle to the first coat, after the first coat is dry. It is recommended to apply two coats of SpECtite PUFlex to achieve a thickness of 1mm. Multiple coats can be applied to achieve higher thickness. Embed fiber mesh around all corner joints, fillets, pipe penetrations, pipes, over cracks, drains, and where substantial movement is anticipated. Lay the fiber mesh in the wet first coat before applying subsequent coats.

Curing and Protection:
It requires 24 hours to dry between two coats, and 48 hours curing is adequate for foot traffic. Low temperature and high humidity will slow down the curing process. Seven days are required for full cure. In case of expected rains, do not apply SpECtite PUFlex. Ensure curing is complete before laying thermal insulation board, mechanical protection, and other coverings.