Silicone (Acidic/non-acidic) vs Goop

[metoo]

I was about to head out to buy some silicone to seal the brackets on the back of the boat. I've read to get non-acidic silicone. Why is that? I was thinking of using Amazing Goop, since I have it. It's does have a quite a smell.

[Heaving Earth]

Uhm, why not use plumbers putty. It doesn't dry out and isn't permanent. I always stay away from silicone, especially if it ever needs paint. Fisheye galore

[JimClark]

All my holes do not have any slop in them. I just make sure to seal them after drilling with thinned epoxy and have never worried about sealing them

[Chilli]

I've used them all. Silicon, Goop, 3m 5200. I think even bathroom caulk. They all work fine. I bed down the hardware for waterproofing and to help hold it in place if the mounting screws loosen a little.

[BHChieftain]

I use Shoe Goo. I've been told that silicon sealant makes repainting very difficult.

Chief

[JrValente]

3m 5200. Is made for sealing below waterline and is a polyurethane base so it will paint up. It is not cheap though.

[Cooper]

I've always used 100% silicon as a seal on hardware. Spread a little on and whipe any excess off after installation. But as mentioned above almost all will work. 3m also makes a rubber tape very similar to plumbers putty, it holds together a bit and is tough to get screws through but ,makes a very good seal around threads if mounting holes are sloppy.

[rickwess]

I use 3M Marine Silicon. Just a very thin bead around the mounting hole on the hardware. Never had it squeeze out. Not worried about re-painting since the proper prep work will take care of any residual silicon.