GlassCast® 10 is a water-clear, UV resistant epoxy casting resin suitable for castings and deep coatings up to 10mm in thickness. It is recommended for clear jewellery casting, 3D resin art, encapsulation and filling holes and gaps in wood up to 10mm.
 
Sold as a kit (resin and hardener). Available to buy online in 500g, 1kg, 5kg and 32Kg
 
More info on Easy Composite website