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Discussion in 'Boat Tips' started by randallewis, Apr 2, 2008.
How much will a can of spray foam expand? I was thinking of filling my john boat seats
Im sure there will be someone here that can help you
I remember reading that one 16oz can of spray foam will expaned to about 3.5 cubic feet of foam.
would it really make a huge diffrence using poured foam rather than spray foam? would spray foam do they same thing?
no ......... that spray foam isn't gonna give the floation factor u need in a boat .............. buy the two part stuff made for floation ...................
Whats that and where do I find it?
it expands a lot !!!
The coach is right. That hardware store foam is for insulation, not flotation. The marine foam is very expensive and you may just want to go to Lowes or Home Depot and buy some thick sections of starfoam and glue it under your jon boat seats. If your sure you want the marine foam, try here....
If you pour foam be careful pouring.
Pour a little at the time and let it expand.
Reason being, that stuff will blow a boat apart. It has to have room to expand. If it doesn't Katy bar the door because something IS GOING TO GIVE and it wont be the foam.
I can attest to that, lol. Luckily it was something much cheaper than a boat.:smile2:
Good post and replys. Thanks i'm interested in using some in the near future myself. I have the floor board of a cajun bass boat out as we speak. In the sides it just has dense flotation foam blocks slid in it. The floor looks to have been poured at the factory between the stringers.
Those blocks in the side are to hopefully make the boat stay upright instead of rolling when swamped.:wink:
I'm gonna stuff all i can into it and install a new floor and freshen up the carpet. plan is to sell it and the 150 yamaha on it and buy an alum. boat i can afford fuel for.
When using two part foam or the spray can foam. The hotter the temp. the more it will expand. Summer time in the heat of the day is when you will get the best results, most expansion! And if it starts to get out of hand spray it with water in a spray bottle. That will almost stop it from expanding.
Would this foam work to insulate the outside of my livewell - it is plastic - Crestliner Fish Hawk?
With regards to expansion of the shoot-n-foam. There are different formulations for less expansion, medium and lots of expansion. Yes, it will insulate your livewell as long as it isn't exposed to sunlight. Sunlight will cause it to decompose.