Rheofinish 380 (Expose) 

Rheofinish 380 is a water based chemical retarder used to expose the aggregate in horizontal concrete surfaces.  Rheofinish 380 delays the set of the mortar paste on the surface to a controlled depth.  Rheofinish 380 does not kill the set of the main concrete.  The retarded mortar paste may be removed by washing and brushing after the set of the concrete to expose the aggregate.

Rheofinish 380 is ideally suited for exposing aggregate on horizontal 'kicker' and construction joints thus ensuring good bonding of the fresh concrete, eliminating the requirement for mechanical preparation of these surfaces.  Rheofinish 380 may also be used on concrete slabs prior to the granolithic application of a screed or thick layer surface topping.  Rheofinish 380 is ideal for the production of exposed aggregate architectural finishes on horizontal surfaces or on pre-cast panels produced in a horizontal plane.