dabco 33-s is a mixture of 33% triethylenediamine and 67% 1,4 butanediol. it is used as a catalyst in the production of polyurethane foams.dabco 33-s is a fast-acting catalyst that improves the flow and surface structure of polyurethane foams. dabco 33-s is used in a variety of polyurethane foam applications, including shoe soles, mattresses and...