The main component of the crosslinker, polyaziridine, reacts with carboxylic acid groups in the resin to form a high crosslinking density that helps improve overall film properties. Therefore, adding no crosslinker or less than the recommended 2 ounces per gallon of paint will result in reduced physical and chemical resistance properties of the polyurethane coating.
Adding more than 2 ounces of crosslinker per gallon of paint does not improve film properties and will only result in the overuse of the material.
Note: The crosslinker will remain active for 24 hours after addition to the paint. After 24 hours, the paint
can be re-crosslinked. Once WR-LPU has been crosslinked 2 times, it’s properties greatly diminish and
should therefore be discarded.