is a natural mineral consisting of a combination of calcium, silicon and oxygen elements, has a chemical compound Ca2SiO4 and also sometimes in the form of a compound 2CaO.SiO2 or CaSiO3 which is commonly referred to as a wollastonite compound.

Judging from its physical properties, this Calcium Silicate is in the form of a white or whitish cream powder that has soft characteristics, flows easily, has a low bulk density, has a fairly high air absorption capacity, has a fairly high heat resistance, so that with its characteristics like this, calcium silicate is widely used as a filler for products for thermal insulation / heat retention applications, fire protection and acoustic insulation / soundproofing.