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SH25 Liquid Silicone Rubber Mould Making Kit 100:3 Part Mix Suitable for Casting –

$32.99 $26.39

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  • Feature:
    Ratio Weight: 100 (A Silicone) : 3 (B Harden)
    Harden Time (surface) : 20-45 mins pot life, 4-6 hrs cure, complete harden 24 hrs
    Shore A Hardness: Approx. 25
    Tensile Strength: Approx. 4.0 MPa
    Ultimate Elongation: Approx. 500-550%
    Tear Strength: > 24 kN/m
    Linear shrinkage 3% slow speed catalyst

    Color:
    White

    Content:
    1KG / 5KGS / 10KGS

    Description:
    Mold silicone rubber is a two-component silicone rubber at room temperature, abbreviated as RTV.
    This is a two-component compound.
    The A component contains a crosslinking agent and the B component contains a catalyst.
    During the packaging process, the crosslinker and the catalyst must be separated.
    Its vulcanization is carried out at room temperature, as long as the two components are mixed in a certain ratio.
    The two-component compound undergoes a cross-linking reaction to form a flexible and elastic colloid.

    Nature:
    (1) Good chemical stability, non-toxic and non-corrosive;
    (2) Good fluidity, can fill the mold automatically;
    (3) Controllable vulcanization speed, vulcanization at room temperature and normal pressure, easy to operate;
    (4) Good demouldability;
    (5) Strong simulation and realistic decoration;
    (6) The mold making speed is fast, and the mold can be made within 20h.

    Operation method:
    1. Stir the silicone and curing agent evenly. Component A is silicone, Component B is the curing agent.
    Example: Take 100 grams of silica gel and add 2-3 grams of curing agent (stir evenly).
    2. Vacuum exhaust air bubble treatment: Remove bubbles after mixing, not exceeding 10 minutes.
    3. Painting or operation process: Brush or pour silica gel onto the product, apply gauze and weft cloth for reinforcement.
    4. Production of outer mold: Surround mold with rubber sheets or wooden boards, fill with plaster or resin layers.
    5. Filling or pouring molds: Use for simple products, pour vacuumed silicone directly onto the model, ensure demolding ease.

    Use:
    Suitable for slicing brush molds, such as cement products, cultural stones, sandstone reliefs, resin crafts, tire molds, etc.

    Instructions:
    Read the user guide carefully before use.
    Safety: Use in a ventilated area, wear safety glasses, long sleeves, and vinyl gloves.
    Store material at room temperature; premix Parts A and B thoroughly.
    Cure Inhibition: Test small area for surface contaminants to avoid uncured rubber.
    Apply sealing agent if necessary.
    Applying a release agent: Optional, recommended for demolding.
    Measuring & Mixing: Mix Parts A and B thoroughly, scrape container sides.
    Vacuum treatment: Do not exceed 10 minutes.
    Pouring: Pour at lowest point, allow rubber to flow evenly.
    Curing: 75 minutes at 23C before demolding, post-cure 4 hours at 65C.
    Using the Mold: No release agent needed for wax/gypsum; recommended for polyurethane, polyester, epoxy.
    Mold Performance & Storage: Clean mold before storage, store level in cool, dry environment.

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