great for not so common uses [SEP] when faced with the daunting task of replacing a drain tube in a boat one asks themselves how the heck am i going to coat the inside of this opening with sealant did a little poking around amazon and i found these wonderful hair rollers that were just the right size to get the job done it was not pretty as i coated the hair roller in tan colored sealant and then repeatedly inserted the roller into the boat to generously coat the insides of the hole with sealant but hey i will be darned if it did not get the job donethere is a use for everything and it turns out that these hair rollers are good for more than just one thing i cannot say much for how they do with hair but i can say if they can handle the abuse that i put them through to get the inside of a hole in a boat coated with sealant they should hold up just fine for hairgreat product highly recommended no matter what you need them for