Ressi SLS 610 Ressi SLS 610 is ready to use premixed self-leveling floor screed which is suitable for both old and new, internal, and external floorings where light to mild traffic is expected. The application thickness of Ressi SLS 610 is between 4mm to 8mm. Ressi SLS 610 is ideal for use to level substrates prior to laying carpets, floor tiles etc. Ressi SLS 610 is also an ideal substrate for the waterproofing of roofs where further coatings can be applied on the surface. Ressi SLS is also ideal for Epoxy Flooring applications where a smooth cementitious floor is required prior to the application of a proper epoxy flooring system.