I had schedule 40 pipe to attach to an outside wall and that not only worked but mixed with the gray color of the schedule 40 pipes so I didn't have a flashy second color either what would draw attention to this area. I definitely recommend this product. I watched the video and saw how useful it is even in areas where treatment flexibility is required. So I plan on keeping a fresh tube on hand in case I need it specifically for this feature as I don't know of any. another one with this function! I sent the video link to my son as he builds the cabin and he might need this right now!