Stay Afloat putty - anyone used in anger?

I noticed that in the video the leaks are only a few inches below sea level and so I wondered how it would stand up to a deeper leak. According to their pdf it has been tested "to 19.15PSIA at 3 meters deep for 24 hrs with no compromise". Now I might be missing something but I believe that PSIA includes 1 Atm pressure so, in real terms, the pressure of the incoming water would be 19.15 - 14.7 (being 1 Atm at sea level) = 4.45 Psi. I would think that a material that is to stop a hole of 1 square inch that is letting water in at a pressure of 4.5 pounds would need to be really sticky if it is to remain in place...
I have not seen the actual stuff in action, so I might well be surprised; somehow I don't think so.
 
I've kept a tub of this stuff on my last 3 boats ... shift it from one to the other. It's a bock of waxy stuff which you could probably jam in a hole ... I think it's best use would be for ramming into a skin fitting if a pipe came off and you could find it in time, or maybe you could block a pipe with it if you had to. Didn't cost much and would be handy in an emergency. I always mean to buy one of those squidgy cones for plugging holes with as well but never get round to it!
 
I interviewed the president of the company for my singlehanded sailing book. Yes, it is made for smaller cracks or holes. It's not really a solid material, it is a waxy putty. It doesn't harden to a solid. It is a soft putty that you can jam into a hole or crack of any shape. For example, if you hit something, you are more likely to crack your hull rather than put in a huge hole (Like the stupid All Is Lost movie). You could easily use Stay Afloat to fill in a crack. You could also mix the putty in with some fabric (like a T shirt) to give you greater volume for a longer crack. It would also work fine for a sheared off through hull pipe.

I specifically asked him if it would last for a trip to Hawaii. He said that because it never hardens, it would last, but it is not meant as a permenant patch - just a stop gap. Hey! I guess this is where the word stop gap comes from!

If you have a larger hole, then the first thing you want to do is jam something in it from the inside. Anything will do, like a sail or a life jacket. (But not an in flatable). then you want to stretch something over the outside of the hull that the water compression will hold into the hole. I looked at all of these in my book. You can get the free version from the Resources section of the SFBaySSS.org website.
 
Bringing in PSIA is confusing ... better just to quote a depth. If it can stay in place at 3 m. depth then that's good enough for your AWB. One does wonder about pounding pressures under rough conditions though.
 
I've used it on my wooden Folkboat to fix weeps more than 'LEAKS' as it were, and have found it to be extremely reliable and consistent. Offshore, it's called 'Monkey Sh1t', which gives the uninitiated a clue as to its consistency!
With an irritating crew it could be used in the ears I suppose....::confused:
 
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