KÖSTER SL Primer is used for absorptive substrates, such as freshly prepared concrete.
KÖSTER SL Protect is an early loadable, mineral based self-leveling underlayment which provides high resistance to chemical and mechanical stresses. It can be used as a directly trafficable layer over uneven or coarse concrete and cementitious screeds. Due to its high chemical resistance it is used to protect against light and medium corrosion and serves as a slowly reacting sacrificial layer in areas of high chemical stress. KÖSTER SL Protect is further used for fast repairs and protection in agricultural, industrial, workshop, production facilities, commercial, and private use buildings. KÖSTER SL Protect is self-leveling from 5 mm, but can be feathered out to 2 mm with suitable tools.