In order to apply polyurethane mastic, all considered seals should be free from any loose articles, dust, paints, grease, water and other form of moisture and polluted items.
In case of any moisture in considered sections, dry it by heat or other methods, because polyurethane mastic application at wet parts, may cause some bubbles.
In case of any pollutions and/or dust or loose parts, remove the same by water jet and/or sands.
Porosity levels should be smoothed by sandblast or other methods.
The minimum age for applying of polyurethane mastic is 28 days.
It is suggested to cover below-layer of water stop by a primer for increasing of adhesion.
Apply the primer at least 3 hours and at most 6 hours before using mastic.
In case after 6 hours of primer application, the polyurethane mastic is not applied in the prepared sections, repeat the primer again.
In order to apply the mastic, it is necessary to have equal width and depth to have a square form for the section in which the mastic is applied as well.
There is a special gun for applying of polyurethane mastic specifically for injection of mastic. Polyurethane sealant is applied by handy / windy guns and maximum pressure of 5.3kg.
Please apply a knife or trowel for polishing the final surface polluted with washing liquid.