3M 4200 Fast Cure Marine Sealant Adhesive

This product arrived in a new package. All looked well. I have used this product many times in the past. HOWEVER, little did I know, this was old product that had likely been sitting Jamestown Distributors shelves for many a moon. Have written to them but have not heard from them. I bought two tubes of this product and both worth worthless.

I used this to repair some rust holes in the floor of my truck as a temporary repair. I simply dried it out, gave it a good vacuuming and applied it and it adhered incredibly well, much better than standard silicone would have...

I was looking for a durable product to use on an project that is highly exposed to sun, salt and water in the Bahamas. I figured this would be the best solution and it needed to be black in color. Only wish it was sold in smaller quantities so that application wouldn't require a caulking gun.

I used this to repair the tiles that had fallen off my inground pool at the water line. Great stuff. Have to use w/in 24 hrs of opening but is workable for awhile after I placed the tile. By the next morning, it was on for good. DO NOT get this on your hands. If you do-I used goofoff til I couldn't stand the burning anymore then it took a couple of days to wear off. I did notice it wore off really quick after I scrubbed my bathtub-I have no idea why. By the way-I am a woman so you can do this too.

After many years of unsatisfactory results using hardware store/home center caulks, I spent the big money and went with a marine product. I selected the 4200 over the 5200 because I wanted to be able to remove the caulk for future repairs etc. This sealant applied nicely and remained workable for a nice long time for touching up. I tooled the sealant with my finger dipped into a small bowl with a bar of ivory soap and water and kept a mineral spirits soaked rag to keep my hands clean and wipe up stray sealant. When tooling the caulk, I first pushed it in place and used very light force when wiping it to keep from pulling it away and wasting material. The result was a beautiful smooth and tidy bead. I check back in a year to report the durability as other caulks never make it a year, especially in my tile wall/tile floor shower stall.

Repaired seam between hull and deck on older sailboat. Easy to apply, worked very well, and took a coat of paint. Very pleased. Dries fast.

I used the 4200 sealant to seal the seams in a fiberglass swimming pool. I also used the product to attach loose tile around the border of the pool. Both applications have been in use for Three years and are holding up well.