Chipping and removing the loose materials, plaster, PCC etc. and clean the surface.
Providing and fixing of polyurethane back-up rod in between the joints. Providing and application of single component polyurethane sealant BOSS – 234, BOSS PU SL CONSTRUCTION, BOSS PU – 25. Providing and application of two coats high flexible waterproofing coating MAPELASTIC SMART over the treated surface.