Casting & Workshop Home / Casting & Workshop / Vermiculite - Superfine Vermiculite - Superfine Vermiculite - Superfine £27.09 £32.51 (inc. VAT) Vermiculite - Superfine Add to your Wish List Information Specifications Reviews Vermiculite is a lightweight volcanic rock which, when added to plaster castings (or sand and cement for outside castings) makes the finished product much lighter. Being a volcanic rock it is fireproof and the superfine grade means easier mixing and pouring. Weight: 10kg Customer reviews No reviews left yet Write a review Most RecentTop Rated No reviews have been left for this product, be the first to leave a review