Raytech-Ray-Model-Blue-Raytech-Ray-Model-Raytech-s-Ray-Model-is-easy-to-mix-fast-to-set-is-non-toxic-&-has-a-zero-shelf-life-P-Its-high-mechanical-&-thermal-characteristics-make-it-perfect-for-the-preparation-of-moulds-for-all-uses-from-the-industrial-&-technical-to-the-artistic-&-fun-Also-ideal-for-circuit-protection-fast-prototyping-anti-vibration-for-doors-&-windows-while-it-can-in addition-be-used-for-fireproof-protection-this-multi-purpose-blue-mouldable