A catalyst is used to hasten curing of varnish. The Catalyst may be needed if your UV box is weak or you do not have intense sun. We recommend using our catalyst, which dries uniformly. Experiment with how much catalyst you add, usually a few drops is enough. Too much catalyst can compromise the varnish. Bottle contains 30ml of Catalyst. Please download USAGE GUIDELINES here. If you are located in Europe, you can order the Eugene Holtier Varnish products from Cremona Tools – and I expect save yourself some shipping cost!
