ROCKBOND SURFACE RETARDER–PLUS (RB 7.17) is a concrete surface retarder and recommended to be used on concrete with strengths of 20 MPa and over, and on concrete under 20MPa in hot weather. When applied to the surface of freshly poured concrete it delays the normal hydration of cement for a depth of 3-6mm (and occasionally deeper), whilst the underlaying concrete hardens normally.

USES

Used in the construction of decorative exposed aggregate driveways, paths etc.
To produce a uniform depth exposed aggregate finishes to in-situ and precast concrete.
Provides an economical surface preparation to concrete that be overlaid with a plaster screed.
It is also used to form a mechanical key at construction joints, eliminating the need for expensive and damaging scabbing.

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