a kit for forming a bioerodible composition is provided with a first aliquot portion of a reaction mixture having an aldehydic polymer solution , and a second aliquot portion of a reaction mixture having solids which include a cross - linking hydrazide . when mixed , the first and second aliquot portions of the reaction mixture react at a ph of 4 to 6 to form a solidified bioerodible composition within about 1 to about 10 minutes , to form a hydrazide cross - linked aldehydic polymer matrix . the bioerodable composition may be usefully employed to seal and / or treat wounds .