Like the pliability of 4200!

Not much to say. Does what it's supposed to do.

Time will tell. Filled several small holes and one dime sized hole. A few days before I get it to the water.
I did t like that the tube only last 24 hours. Since I couldn't get it to the water to test for a week. That means another tube if it leaks.
Seems the YouTube community loves it. So remaining optimistic.

This is good stuff.
Major problem is if you use a little bit and its days or weeks or even months before another use, the white adhesive has dried and you can't get the top off, or you can't squeeze anymore out.
You'll end up putting a nail or screw in the side of tube.
3M needs to figure out a way that the consumer can utilize the entire product.

This stuff is great when you need to seal a hole in your boat. It is thick and tacky enough to hold a gasket in place while you mount it, isn't too runny and seals as a non-brittle but strong bond so it wont crack later. Buy this when you need it don't expect it to last long after you open the cap and use it. It is a fair price to pay when sealing areas you need to keep water out below your boats water line ( if you think this is expensive look into the 2 part fusor products used in the transportation industry). If you want to keep extra around I suggest buying a spare tube to keep unopened. A tip for those worried about "blowing the tip off" cut a large enough hole for the product to flow through...its thick and tacky, also use firm even pressure do not try and get it all out at once. If you have to you can place the tube in a bowl of hot water to soften the Adhesive and make it more fluid and easier to squeeze out. I used this for quite a few projects, recently I mounted a rod holder with it to protect the boats paint, and used it when I installed my livewell aerator, I also sealed a hole in the plastic liner of my beer fridge and to patch a gouge in a linoleum floor. I have been able to clean and re-use my last tube many times just by cleaning the threads after each use removing the applicator and punching a nail backwards down the tip. Fair winds and tight lines !