as well as in part b prior to mixing the components and forming a film generally the polyamine should be a chosen from the group consisting of primary or secondary amines in fact while any amine could be used the amines discussed below in connection with part b are presently preferred for use in part b as well as in the polymerization step of part a in one particularly preferred embodiment of the invention the polyamine is a 34 non gel 34 reaction product prepared by reacting one and one half moles of hexamethylene diamine one half mole of a polyoxypropylene diamine and one mole of n n 39 bis methoxymethyl uron as described by one of the present inventors in his u s pat nos 4 490 510 4 574 145 and 4 659 787 as noted earlier polymerization may be stopped at any point by bringing the ph to below about 7 rendering the reacting species too weak to continue to propagate this is done by adding acid sulfuric phosphoric formic acetic and lactic acids among others are effective to halt polymerization when used at stoichiometric ratios of at least one equivalent per active oh 31 or amine hydrogen and preferably at a 1 2 or higher stoichiometric equivalent level although it is preferred that the two component system be made up of part a epoxy.