Zak Jewelry Tools

Castaldo® LiquaCast Long Life® Molding Rubber

Ordinary low-cost RTV liquid rubber molds become soft and unusable over time, wasting the time, effort and skill invested in making them. Sometimes they even turn back into liquid rubber! LiquaCast® Long-Life™ 0% shrinkage RTV rubber is formulated to last for decades without softening, distorting or degrading in any way. Have you looked at your library of rubber molds recently? If you have made low-cost RTV liquid rubber molds in the past many of them are probably becoming useless due to age, sometimes even after only 2 years. Years of work could be slowly melting. Wouldn’t you rather have molds that last and last? Castaldo® LiquaCast Long Life® makes molds that are extremely strong, tough and tear-resistant, another reason they will last and last despite repeated use  It’s perfect for complex molds, difficult undercuts and spirals and cores. And it’s compatible with mostcomputer-generated CAD-CAM resin and difficult to mold CAD-CAM wax patterns. Instructions. Part A MSDS. Part B MSDS.

    Shore A Hardness 45
    Mix ratio by weight 1:1
    Viscosity **

    Very low

    2,000 cps

    Vulcanizes at

    70 ̊ F/ 21 ̊C

    Cure time 24 hours
    Rapid Cure Time @150 ̊F/ 65 ̊C 90 minutes
    Specific gravity *** 1.02
    Elongation before break 1,135%
    Tensile strength before break

    408 psi

    2.8 n/mm²

    Tear strength Die C before break

    82 lb./in.

    14.3 n/mm

    Color Yellow