I just used some 3 year old 2 part glue and it worked great. I bought it in 2011, used about a 1/3 of the can, and stuffed it away. Then my buddy wanted his IK seam fixed, so I injected some MEK into the failed seam, and then injected some mixed glue. I let that sit overnight, and aired the tube up to shape. Then I put a 3" patch over that. Only used one coat. The boat has been inflated fully since Monday, looking good.