Surface Retarders in USA and Worldwide
Expo-Rock gives a clean, professional, even look to exposed aggregate finishes. The concentrated retarder keeps mortar from sticking to the aggregate. It allows even removal of mortar from the slab surface.
Make exposed aggregate finishes easier and more consistent. Ten predetermined color-coded exposure depths are available to provide consistent, repeatable cement paste removal and aggregate reveal.
Stepstone, Inc's Retarder Paper helps create exposed aggregate surfaces in precast. Work with 5/8" aggregate (or smaller). Depending upon the wetness of your mix the depth of etch is 3/16". Strip and wash within 24-hours of casting. Test our paper. Request FREE SAMPLES.