For a flush repair
• When adding powdered oxides or liquid colorants
By preventing accelerated moisture loss
The Modifier should not be allowed to freeze
or contrast with the concrete piece
TK-290 WB Salt Protector Plus 5 Gallon HandTools For a flush repairTK 290 WB is a waterborne silane siloxane, multi substrate, salt, and water repellent, engineered to prevent damage from environmental conditions including de icing agents, salts, freeze damage, efflorescence, scaling, surface popping, and the damaging effects of acid rain. TK 290 WB is formulated to penetrate up to 1 8 inch (3. 175 mm) and chemically bond with the substrate to become a permanent part, prohibiting salt, water, and chloride ion