In Stock Materials for engraving GRS Termo-Loc material for fastening parts 225 g. GRS 09703 €54.90 Polymer material to firmly hold irregular pieces, which makes it very useful in goldsmithing, setting and jewelry in general. Very malleable when hot and rigid when cold. reusable. Format: 225 grams in 15 cm bars. Not toxic. Biodegradable. View