"I bought 6 tubes of this (grey colour) on special offer. Only needed 3 in the end so not quite so much of a saving which is a bit annoying. Anyway, first impressions are good. Bought this to seal around chimney on roof. Sticks to just about anything. A skin forms in about 5-10 minutes and my advice is to take their time with shaping with a trowel etc. ie dont put too much on in one go. When its dry its quite flexible. The true test will be over winter and inspect in a years time. One of the best bits I like about this stuff is the nozzel is quite easy to clear in a couple weeks time should you want to use it again."