{"product_id":"castaldo-liquaglass-no-shrink-clear-rtv-mold-rubber-1-kilo-kit","title":"Castaldo LiquaGlass-No Shrink, See-Thru Room Temperature Mold Rubber-1 Kilo Kit","description":"\u003cp\u003e\u003cstrong\u003eCastaldo LiquaGlass™\u003c\/strong\u003e is a clear, two-part liquid molding rubber for creating see-through RTV molds with \u003cstrong\u003ezero shrinkage\u003c\/strong\u003e. Ideal for jewelry mold making, LiquaGlass™ offers clarity, flexibility, and strength—so you can \u003cem\u003esee\u003c\/em\u003e your work as you cut and inject wax. This 1 kilo kit includes 450 grams each of Part A and Part B and cures at room temperature.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e100% clear RTV molding rubber—see through your molds as you inject wax\u003c\/li\u003e\n\u003cli\u003eZero shrinkage (\u003cstrong\u003e0.0%\u003c\/strong\u003e) for high dimensional accuracy\u003c\/li\u003e\n\u003cli\u003eEasy 1:1 mix ratio by weight—no volume guesswork\u003c\/li\u003e\n\u003cli\u003eLow viscosity (≈ 1,200 cps) for smooth mixing and bubble-free casting\u003c\/li\u003e\n\u003cli\u003eCures at room temperature (70 °F \/ 21 °C) in 16–24 hours\u003c\/li\u003e\n\u003cli\u003eClear blue-green finish for maximum visibility during mold cutting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eMix Ratio (by Weight)\u003c\/th\u003e\n\u003ctd\u003e1 : 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eViscosity\u003c\/th\u003e\n\u003ctd\u003e1,200 cps (very low)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHardness\u003c\/th\u003e\n\u003ctd\u003eShore A 50 ± 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShrinkage\u003c\/th\u003e\n\u003ctd\u003e0.0%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecific Gravity\u003c\/th\u003e\n\u003ctd\u003e1.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTensile Strength (Before Break)\u003c\/th\u003e\n\u003ctd\u003e2.1 N\/mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eElongation (Before Break)\u003c\/th\u003e\n\u003ctd\u003e750%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTear Strength (Die C)\u003c\/th\u003e\n\u003ctd\u003e12.9 N\/mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eClear blue\/green\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKit Net Weight\u003c\/th\u003e\n\u003ctd\u003e1 kilo (900 g usable rubber)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e450 g Part A\u003c\/li\u003e\n\u003cli\u003e450 g Part B\u003c\/li\u003e\n\u003cli\u003eInstruction sheet and mixing guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstructions for Use\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eShake both Part A and Part B well before use.\u003c\/li\u003e\n\u003cli\u003eMeasure equal parts by weight (1:1 ratio) using a precise scale—do not estimate or measure by volume.\u003c\/li\u003e\n\u003cli\u003ePour Part A into Part B and mix by hand for 3–4 minutes until color is uniform, scraping the sides and bottom of the bowl.\u003c\/li\u003e\n\u003cli\u003eVacuum the mixture for approximately 5 minutes to remove air bubbles—it should rise and collapse once.\u003c\/li\u003e\n\u003cli\u003ePour into the mold frame, avoiding air entrapment, then vacuum again for 3 minutes.\u003c\/li\u003e\n\u003cli\u003eAllow to cure at room temperature (77 °F \/ 25 °C) for 16–24 hours. Do not disturb during cure.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eApproximate Rubber Usage Guide\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eMold Frame Size\u003c\/th\u003e\n\u003cth\u003ePart A (g)\u003c\/th\u003e\n\u003cth\u003ePart B (g)\u003c\/th\u003e\n\u003cth\u003eTotal (g)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0.75″ (19 mm)\u003c\/td\u003e\n\u003ctd\u003e60 g\u003c\/td\u003e\n\u003ctd\u003e60 g\u003c\/td\u003e\n\u003ctd\u003e120 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1.00″ (25 mm)\u003c\/td\u003e\n\u003ctd\u003e77 g\u003c\/td\u003e\n\u003ctd\u003e77 g\u003c\/td\u003e\n\u003ctd\u003e154 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1.25″ (32 mm)\u003c\/td\u003e\n\u003ctd\u003e105 g\u003c\/td\u003e\n\u003ctd\u003e105 g\u003c\/td\u003e\n\u003ctd\u003e210 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1.50″ (38 mm)\u003c\/td\u003e\n\u003ctd\u003e113 g\u003c\/td\u003e\n\u003ctd\u003e113 g\u003c\/td\u003e\n\u003ctd\u003e226 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePorous materials such as wood, terra cotta, and plaster must be sealed with wax, PVA, or potter's soap before casting.\u003c\/li\u003e\n\u003cli\u003eLiquaGlass™ is \u003cem\u003enot a silicone rubber\u003c\/em\u003e; follow the manufacturer's mixing and vacuuming instructions carefully.\u003c\/li\u003e\n\u003cli\u003eLonger cure times produce stronger, more stable molds without deformation.\u003c\/li\u003e\n\u003cli\u003eStore unmixed components in a cool, dry area (50–80 °F \/ 10–27 °C) with containers sealed to prevent moisture contamination.\u003c\/li\u003e\n\u003cli\u003eWear gloves and protective eyewear when mixing and vacuuming.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castaldo","offers":[{"title":"Default Title","offer_id":43579571470550,"sku":"122.603","price":105.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/castaldo-liquaglass-no-shrink-see-thru-room-temperature-mold-rubber-1-kilo-kit-otto-frei.jpg?v=1719958587","url":"https:\/\/www.ottofrei.com\/products\/castaldo-liquaglass-no-shrink-clear-rtv-mold-rubber-1-kilo-kit","provider":"Otto Frei","version":"1.0","type":"link"}