I use this butyl tape in many applications, but the best for me is re-bedding boat stanchions or any hardware that penetrates the deck. I never hardens and that is good if the item needs to be removed. Its flexibility allows it to be molded to conform any shape and it provides a great coverage throughout at the item is tightened. The white color is also desirable for white boat decks. It also works great as a sealer for RV window frames. Overall is a great item to carry in your toolbox for emergency repairs also.