EnviroCat 150 is a crosslinker for water based finishes to improve hardness, chemical, scratch, mar resistance in all Envirolak top coats. There is a 10-hour effective period once added to topcoats, unused product will not gel and can be re-crosslinked and re-used at a later date. In vertical spray applications, the addition of CAT150 Crosslinker will help eliminate orange peel to give a smoother finish.