Fillers / Extenders > Talc or Magnesium Silicates
As a filler, talc lowers the cost of the formulation without impairing the physical properties of the adhesive (works like an extender). Talc is also considered as reinforcement filler due to its platy structure and aspect ratio. Apart from behaving like filler, talc can also serve as a UV stabilizer in adhesives and sealants.