Re: 4200 vs. 5200
5200 is supposed to be permanent. 4200 slightly less permanent, from my reading anyway. I'm wanting to know more, because the product doesn't keep long after breaking the seal, and I want to seal my transom holes with this when I mount everything back on it. I doubt I'll use all of the 5200 I have on my deck screws, and I'd hate to buy 4200 just for the transom and throw some 5200 away. But I may need to remove them someday!