series of controlled experiments demonstrating the effect of curing agents formulation 1 shows a preferred embodiment of the invention formulation 3 a b and c show the effect of increasing the curing agent from zero to six percent 0 6 by weight the inclusion of greater amounts of curing agent reduced both the induction time and the gelation time however above four percent 4 curing agent full gelation is never reached from this result the conclusion that the high concentrations of curing agent begin to interfere with the formation of high molecular weight polymers formulation 4 includes no catalyst and no curing agent the result was a formulation having a delayed induction time and gelation time fig4 is a table showing the effect on gelation time that the different curing agents create for purposes of forming a waterproofing membrane a gelation time of sixty 60 seconds is preferred for other applications different gelation times may be more desirable bituminous materials are a broad class of carbon rich materials that typically have a high penetration index number u201c pin u201d examples of bituminous materials include the numerous grades of asphalt performance grade asphalt also known as polymer modified asphalt and coal tar the bituminous material preferably has a penetration index number of 16 and 195 asphalts can be described by their penetration index numbers while all asphalts are included in this invention experiments were conducted on type i ii iii and iv asphalts having pins ranging from 16 to 37.