ACTIVA-Lumina Polymer Air Dry Clay, Lumina Clay is an air-dry polymer resin clay that does not require heat to cure, When dried Lumina clay is waterproof; extremely durable; has a high flexibility; is acid free and is translucent, It is great for rubber-stamping; figurines; making flowers; ornaments; jewelry and so much more, This package contains one 5, 25oz/150g block, Clay conforms to ASTM D4236, Imported, SKU: NMG113