You are in: Products - Casting - General Fillers
![]()
Finely powdered stone fillers for polyester resin. Please note that we cannot guarantee colours, and that enough should be in hand of the same shade for the whole job in hand.Fillers are used for a variety of reasons: for effect, as with metal fillers, slate or synthetic onyx; to improve opacity when using pigments; or to bulk out the resin for economy and to reduce heat (exotherm) when casting large solid pieces. Other useful properties, such as improved hardness, scratch resistance and thixotropic qualities, can also be achieved by adding fillers.
Subdivisions
We have grouped all the products into Subdivisions to make it easier to find what you are looking for. Click on a Subdivision to view all the products within it.
Synthetic Onyx
Aluminium hydroxide; a white filler giving excellent translucent qualities similar to onyx and some marbles. Can be used with pigments.Quantity discount available on 25kg size:10+ less 10% discount
Marble Filler Powder
100 mesh white marble filler powder (technically calcium carbonate - CaCO²), made from pure marble rock. 150 microns is the largest particle size, but 50% gets through 10 mesh. Gives better opacity ...
Marble Filler Coarse
A coarser marble filler powder which brings a glint or sparkle to castings, sometimes seen in carved pieces of marble. To be mixed with other fillers such as Synthetic Onyx and 100 mesh Marble Filler...
Slate Filler
Finely powdered slate. Correctly used it is possible to obtain a beautiful slate finish. Also makes a good inexpensive general purpose filler.Quantity discount available on 25kg size:10+ less 10% d...
Fillite
A lightweight filler, grey in colour. For use in polyester resins etc. Has good flow properties, but in very high loadings will increase the viscosity of the resin.





