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Cast-a-Mold 25T

(12 reviews) Write a Review

$24.99 - $531.21

Cast-a-Mold 25T is a general purpose silicone with excellent tear strength. It's easy to mix and will cure at room temp over virtually any surface.

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Cast-A-Mold 25T is a general purpose rtv silicone elastomer which exhibits excellent tear strength, long library life, and accurate detail reproduction. Cast-A-Mold 25T is a condensation cured silicone (tin catalyzed ) It is used to make rubber molds that can be used to cast polyurethanes, epoxy's, polyester's, cement, concrete, soap, wax, plaster, etc.. It is easy to mix and de-air, and will cure at room temperature over virtually any surface. Cast-A-Mold 25T is extremely useful for applications where superior physical properties are required.

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Mix Ratio 10:1 by weight
Working Time 1.0 hour
Demold Time 16 hours
Heat Deflection 300°F +
Tensile Strength 600 psi
Elongation 500%
Tear Resistance 150 ppi
Color Green
Hardness 25-A
Viscosity 30,000 cps
  • 5 Jose on Jun 28th 2023
    Excellent Silicone - long working time

    I strongly recommend you vacuum degas it. But it can be used without this process it on low-detail models. Very flexible. long lasting, I've got some molds with over 40 castings and still strong.

  • 4 janice on Apr 28th 2023
    Cast a Mold

    Great product. Easy to use. No bubbles, lots of work time.

  • 5 Jeff on Apr 18th 2023
    Cast A Mold 25T

    Great rubber. Easy to mix and use. Become my go to rubber for production molds.

  • 5 FredD on Aug 1st 2022
    Cast a mold 25t works me me!

    This stuff works great for my one piece moulds... I soften it a bit with some silicone oil and my parts just pop right out without issue. Have bought before and will continue to do so!

  • 5 Tom Howell on May 20th 2022
    Cast-a-Mold 25T

    Color coded components make it easy to get the right mix every time

  • 5 Bill Buchholz on Apr 5th 2022
    Cast a Mold

    Great product been using for years

  • 5 richard meter on Feb 10th 2022
    cast a mold 25t

    ive used this for years. perfect results,

  • 5 Eric on Dec 3rd 2021
    Mold Rubber Cast-a-Mold 25T

    Great product! Easy to measure out and mix by weight. Because of the contrasting colors, for tiny batches you can even mix to the desired final color (light turqoise) and it seems to work fine. Has a long pot life and naturally degasses very well. Is reasonably strong after curing and simple molds will last a long time. Complicated molds won't last as long but do capture every minute detail. Odors are minimal and not unpleasant. This has become my favorite molding rubber!

  • 5 Daniel Bryant on Aug 27th 2021
    The Best

    This stuff is great