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    ​​​​​MasterFinish 380

    Surface retarder that delays mortar past​e setting used to expose the aggregate in horizontal concrete surfaces​

    How does MasterFinish 380 work?

    MasterFinish 380 is a water based chemical retarder used to expose the aggregate in horizontal concrete surfaces. MasterFinish 380 delays the set of the mortar paste on the surface to a controlled depth. MasterFinish 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.

    Easy to see when applied to dark or light concrete​

    MasterFinish 380 from Master Builders Solutions has been re-formulated with a high-visibility yellow pigment dye, making it easy to see when sprayed onto any colour of freshly placed of concrete – including mixes containing black oxide pigment.
    MasterFinish 380 Features & Benefits

    Recommended uses:

    • MasterFinish 380 is ideal for the production of exposed aggregate architectural finishes on horizontal surfaces or on pre-cast panels produced in a horizontal plane.
    • MasterFinish 380 may also be used on concrete slabs prior to the granolithic application of a screed or thick layer surface topping.
    • MasterFinish 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.

    What makes MasterFinish 380 a unique solution?

    MasterFinish 380 set retarder is economical and extremely easy to use. Once the free water has evaporated from the surface of the freshly placed concrete, spray-apply MasterFinish
    380 at the rate of 250mls per square metre. The non-staining yellow dye clearly shows which areas have been sprayed, helping to ensure you achieve full and even coverage, every time.

    MasterFinish 380 New Yellow Colour


    Direct contact

    Andrew Sarkady

    Andrew Sarkady

    National Industry Advocate Civil Infrastructure – Transport

    0418 530 763


    MasterFinish 380 New Yellow Formulation

    pdf (291.69 Kb)

    MasterFinish 380 SDS Australia

    pdf (152.50 Kb)

    MasterFinish 380: Technical Data Sheet

    pdf (195.52 Kb)