ATH is a Aluminium trihydroxide filler powder which is generally used with our fast cast resin products to alter the properties and bulk the material out.
 
Aluminium Trihydrate can be added to casting resins at an approximate maximum percentage of 200% by weight (e.g. 200g of filler powder to 100g of resin).
 
It is s a low-cost, inert, odourless filler powder than can be used to bulk-out, reduce shrinkage, add weight and add fire retardancy to casting resins including polyurethane, epoxy and polyester.