by Mike - Alumilite » Tue Feb 05, 2013 8:03 pm
That is our Plat 55. Yes, it is our highest durometer (stiffest) rubber for making molds. It is however thick and the most difficult to mix but it gives you a harder rubber that is excellent for making 2 piece molds and a higher tear strength than the QuickSet. It is recommended you vacuum that silicone after mixing to remove the air that you stirred in. IF you don't have vacuum, we recommend simply mixing it thoroughly and then brushing on the first layer to make sure the silicone is against the surface of your part. Once you brushed on the first layer of silicone onto your lure and wet out all the surfaces, simply pour the rest of the mixed rubber and fill your mold box. This squeegies the silicone against the master and does not allow air bubbles to stick to the surface of your mold enabling the air float away from the surface, to the top of the mold, giving you a perfect mold surface.
The higher durometer rubber is the best for multiple piece mold alignment as well as does not flex when clamping tightly or when pouring expandable foams.
Mike