Body Filler Talc Magnesium silicate hydrate and calcium carbonate Polar Minerals Extenders / Fillers >> Talc or Magnesium Silicate Polyesters SEALANT >> Putty Blend of magnesium silicate hydrate and calcium carbonate Mineral additive Body Filler Talc Polyester Body Putty Blend of magnesium silicate hydrate and calcium carbonate. Used as an extender in polyester body putty.