Catalyst
The "catalyst" is an indispensable chemical component to be combined with special products defined as "two-component", i.e. products whose activation occurs only after mixing the 2 compounds, so that the chemical reaction takes place and the product is ready for its application.
Specifically, The Care fillers are two-component fillers, the catalyst for which is always supplied inside the package to be mixed at 2/2.5% in order to activate the hardening process of the filler.