FAST SPECJAL W is a cement - polymer mortar, water and frost resistant, characterized by increased vapor permeability, flexibility and resistance to mechanical loads. FAST SPECJAL W adhesive mortar, thanks to its high flexibility and adhesion, is ideal for gluing mineral wool panels on almost any type of building foundation and for applying a reinforced layer when heating buildings in the FAST W and FAST WG systems.

Technical data

• Adhesion to concrete: minimum 0.40 MPa,
• Adhesion to wool (lamella): minimum 0.10 MPa,
• Adhesion to wool (board): minimum 0.1 Mpa