New Expanding Rubber! Our new rubber formula allows you to cast parts and enlarge them up to ~150%. Expanding Rubber is 1:1 mix ratio.
Cast rubber part must be submerged in water to grow. Parts with a thin cross section will expand faster then thick parts. Once parts have expanded completely, they must be molded immediatly. Once removed from water they will begin to shrink as they dry out. Fast setting silicone, like PlatSil Gel-25, are ideal for molding expanded parts.
Expanding rubber may be cast into Tinsil and PlatSil molds.
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