What's a good product to seal nail holes in roof?

Question

We have a sloped room (kind of like a chicken coop) with a corrugated metal roof. The nails are popping out now and we're going to replace those with screws. What's the best product for sealing them? Need something that's weatherproof, of course, and won't crack, very durable.

Answer 1

A one gallon can of good ol' roofing tar, some rubber gloves, and a paint scrapper.

Answer 2

You don’t want an asphaltic product like 'tar' or fibered roof flashing cement.- they just aren’t designed for applications over metal panels, and in some cases I have seen ‘tar’ like products heat up, melt and drip into the holes that they were meant to seal in the first place… What you need it a good one part urethane sealant. Urethanes offer the most protection against UV degradation and offer excellent weatherproofing abilities to keep rain and moisture out, in addition, the flexibility of urethanes will ensure you wont be 're-doing' your work every few years. I would suggest two basic products that can be found about anywhere: NP-1 http://www.buildingsystems.basf.com/docu... would be my first choice, its one of the premiere urethane sealants on the market produced by BASF The Chemical Co. And if you are looking for something a little more expensive Solarseal http://www.npcsealants.com/900.htm is an excellent product for sealing metal- it’s technically an electrometric urethane. Both of these products are available in individual caulk cartridges, there easy to use and frankly, fork great. I would also recommend that when you replace the nails with screws you use stainless steel screws with neoprene gasketed washers, these will help seal themselves, eliminating the need to install sealants around them.

Good Luck!

Answer 3

I would think roof cement in caulking tubes would do a good job. If the black color is offensive, then use a high quality acrylic clear acrylic caulk.