I've seen in past posts about 3M 5200 Silicone, recommended for sealing the seams and rivets on masts, as well as other things.
Is there really a difference, by using 5200?

I've looked for 3M 5200 in some stores. Just can't find it, but I have seen various Silicone sealers and adhesives by 3M, Permantex and other brands.

I'm referring to the sealer that people here refer to, for spreading around existing rivets and seams on a mast, to prevent water from getting inside. Also the gaps where the front and rear crossbars meet the hulls, also to reduce the chance of water entering the hulls in this area.

So, why find and use 3M 5200, instead of the more common silicone sealers I see?

Marshall