This is truly the best stuff money can buy.  Pricey yes by a few dollars but goes a very long way on trim, splices etc...  An RV youtube channel Nomadic Fanatic referred me to it.  Pay the extra $ for this over the other stuff & you'll thank me later as will the next guy that buys your RV someday.  Try to use the tube up because it will go bad which goes to show you it's a powerful product.  This used as directed & in conjunction with Butyl Tape WILL give you year's above & beyond the factory warranty !