Lightweight, hollow, alumino-silicate microspheres with a low density of 0.7 g/cc. These cenospheres are approximately 25% of the density of other mineral fillers but are also strong enough to withstand most mixing, compounding and processing activities. When added to the resin it will increase the volume whilst reducing the weight and cost of a casting.
The maximum amount that can be added will vary with each application. We recommend starting with a ratio of 50% as the mixture will remain pourable. The ratio can be increased with each subsequent casting until the increased viscosity starts to affect the quality of the casting.