NT CAT A-4 is a quick-acting catalyst used in the production of polyurethane foams. It is a water-based catalyst that is compatible with a variety of polyurethane systems. NT CAT A-4 is also non-corrosive and non-flammable. NT CAT A-4 is a popular choice for a variety of polyurethane applications, including: · Soft foam · Hard foam · Spray foam · Molding plastic...