These are great considering CA glues do have a self life, especially when opened. I also love this size i carry in my bicycle tube repair kit. Apply over the hole, put on the patch, put tube back in tire after a few seconds & I'm riding again. Just toss when done. After the summer, I rotate the tubes to modeling so to keep a fresh tube in the repair kit. Good for woodworking, dissimilar material glueing, & small gap filling.