NEOADD PAX-524 is low toxicity (non-genotoxic and non-mutagenic), multifunctional polymeric aziridine crosslinker. Additions of 4-8% (wt/wt) to carboxylic acid functional waterborne acrylic emulsions or urethane dispersions produce significant improvements in chemical and mechanical resistance properties such as water, alkali, alcohol, and oil resistance as well as scratch and rub resistance levels. The form supplied is approximately 50 % in Proglyde DMM.