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    Plaster

    Plastomix C200 S high strength cementitious ready mix plaster for walls and ceilings by MATEX

    Plastomix C200 S

    High Strength Cementitious Dry Ready-Mix Plaster

    PLASTOMIX C200 S is a high-strength, cement-based ready-mix plaster formulated for internal and external use on block walls, ceilings, bricks, and concrete. It creates a smooth, durable layer with excellent shrinkage control and mechanical performance. Easy to apply, it provides long-lasting coverage ideal for harsh tropical conditions. While not recommended for painted surfaces, PLASTOMIX C200 S ensures a uniform, crack-resistant finish suitable for both new construction and refurbishment projects. Its high strength and stability make it an essential product for demanding plastering applications.

    Technical data:
    • Appearance : cement powder
    • Thickness : up to 20 mm
    • Workable time : 40 minutes @ 25°C
    • Curing : 2 days with water
    • Coverage : 19.0 kg per 1m²at 10 mm thickness
    • Packaging : 50 kg bag
    Related Documents:

    How to Apply Plastomix C200 S

    Plastomix C200 S is mixed with water and applied by hand or plaster-spraying machine onto a prepared, pre-wetted substrate.

    1. Prepare the substrate. The substrate must be free of loose particles, dust, dirt, grease, oil, curing agents or paint, sufficiently cured with shrinkage complete, and not exposed to movement, vibration or impact.
    2. Apply a Rushbond key coat. Always apply a Rushbond spatter dash coat first: Rushbond on fair face concrete, Rushbond BL on AAC lightweight block, Rushbond MS on concrete with micro silica or GGBS.
    3. Pre-wet. Saturate the surface with water and wait for excess water to evaporate before applying the mix.
    4. Mix. Add a 50 kg bag to 8-9 liters of clean water and mix with a low speed mechanical mixer (200-300 rpm) and paddle until lump free. Let stand 5 minutes and remix. For spray machines, adjust water for uniform viscosity. Do not add further water or remix set plaster.
    5. Apply. Apply manually or by spray machine in one coat up to 20 mm. For greater thickness apply two layers, leaving the first rough and water curing it for two days before the second.
    6. Finish. When the plaster starts to set, smooth it with a wood or plastic float and steel trowel. Do not spray water on the coat to ease finishing, as this removes cement and weakens the surface.
    7. Cure. Water cure for a minimum of two days, keeping the surface moist and protected from sun and wind for the first 48 hours. Let the plaster dry out completely before stucco, paint or wallpaper.
    8. Clean tools. Clean tools with water before the product dries. Hardened material can only be removed mechanically.

    Summary of the method in the Plastomix C200 S Technical Data Sheet. Always follow the full TDS on site.

    Standards & Test Methods

    StandardTitleReferenced for
    ASTM C150Standard Specification for Portland CementListed standard (portland cement)
    ASTM C926Standard Specification for Application of Portland Cement-Based PlasterListed standard (application of portland cement-based plaster)
    ASTM C897Standard Specification for Aggregate for Job-Mixed Portland Cement-Based PlastersListed standard
    BS 1015Methods of test for mortar for masonryListed standard
    BS 4551Mortar — Methods of test for mortar and screed — Chemical analysis and physical testingListed standard

    Standards and test methods as referenced in the Plastomix C200 S Technical Data Sheet. Values in the TDS are typical laboratory results under standard conditions.

    Frequently Asked Questions

    What is the compressive strength of Plastomix C200 S?

    Compressive strength is 20.0 N/mm² at 28 days, with flexural strength of 2.0 N/mm² at 28 days.

    What thickness can Plastomix C200 S be applied at?

    Up to 20 mm in one coat. For greater thickness, apply two layers with two days of water curing between them.

    What is the coverage of Plastomix C200 S?

    Plastomix C200 S requires 19.0 kg to cover 1.0 square meter at 10 mm thickness.

    Does Plastomix C200 S need a rush coat?

    Yes. The TDS states a Rushbond spatter dash coat is always required, with the type chosen by substrate: Rushbond, Rushbond BL or Rushbond MS.

    What surfaces should Plastomix C200 S not be applied on?

    Do not apply it on gypsum, metallic or wooden supports, or on painted surfaces.

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