spray foam?

[Jason4636]

When you mix A part and B part together. The hotter the 2 parts are, the faster the foam will rise. You can read all kinds of horror stories about foam. If done RIGHT it easy, quick, and very simple to add strength and flotation to a hull. If done WRONG you will destroy your hull in a matter of minutes. With that said, it's very easy to use this stuff.

Here's some tips, that I follow when I use foam;
1. Mix small batches, and let it set up for a good 10 minutes between pours or more.
2. If it's above 70 degrees, do your pours outside in direct sunlight. Cause the warmer it is, the faster it will cure
3. If pouring a large pour, have some holes for the foam to escape from.

If its to cold when you pour it, it can't fully cure. And when you take it to run. And its in the direct sunlight. When the foam gets heated back up, it can start to grow again and split your hull. Thats why I try to do any kind of foam work when its warm and in direct sunlight. Plus when I do my final pour,I'll leave it set out in the sun for a couple of hours, just to make sure its done curing.

[Jersey Crewmax]

When you mix A part and B part together. The hotter the 2 parts are, the faster the foam will rise. You can read all kinds of horror stories about foam. If done RIGHT it easy, quick, and very simple to add strength and flotation to a hull. If done WRONG you will destroy your hull in a matter of minutes. With that said, it's very easy to use this stuff.

Here's some tips, that I follow when I use foam;
1. Mix small batches, and let it set up for a good 10 minutes between pours or more.
2. If it's above 70 degrees, do your pours outside in direct sunlight. Cause the warmer it is, the faster it will cure
3. If pouring a large pour, have some holes for the foam to escape from.

If its to cold when you pour it, it can't fully cure. And when you take it to run. And its in the direct sunlight. When the foam gets heated back up, it can start to grow again and split your hull. Thats why I try to do any kind of foam work when its warm and in direct sunlight. Plus when I do my final pour,I'll leave it set out in the sun for a couple of hours, just to make sure its done curing.

Reading this makes confirms my thoughts that you did a great job on the motley crew hull I picked up from you.

[Jason4636]

Plus when I did the MC it was 100 degrees outside. Have you got it up and running yet

[jcald2000]

I use the CG approved 2 pound per cubic foot 2 part foam, $20.00 for 1 quart of part A & B. Shelf life is 1 year.
All Spray can foams are humidy cure, that is the danger. Boat get wet inside and foam expands and splits the hull.
Read the tech. spec's on line from the mfg's not the can.

[96XP]

Shelf life is 1 year.

Yes, and I've had left overs in 5 gallon pales crystallize from sitting. I nuked them in an old micro to get them back to liquid state. (1 quart at a time in plastic containers)
Probably not recommended, but some rules are just meant to be broken at times. Lol

[pescador]

FYI I used 2 lb. foam in my UL-1 a few years ago and it caused some quarter sized dimples on the top deck, just cosmetic nothing on the bottom.
Kind of a pain now try the batteries sticking into the sponsons as well.

[ray schrauwen]

Dollar stores had some the other day.

Where do you guys find pool noodles this time of year?

[crrcboatz]

Boy I just cannot make ANY sense in using this nasty stuff.
1. It is insanely heavy compared to noodles
2. It can separate ur boat if u r not VERY careful in using it
3. It is messy sticks like glue any place or thing it touches
4. Unpredictable what the final end product will be after expanding
5. It is pure hell to remove from a hull
This stuff is a NO brainer, stay away from it period!

[Doby]

Only those that don't know how to properly apply it have difficulty with it.

[crrcboatz]

Only those that don't know how to properly apply it have difficulty with it.

I certainly hope u were not implying I don't know how to apply the stuff cause I have been there and done that a looooooooooooooooooooooooooong time ago. I seriously doubt u have slept as many nights in this hobby as I have. This stuff went out of style in the 80"s and I go well back of that!!!!

[ray schrauwen]

I like to use it in the tips of boats like sponsons, then pool foamies where they fit not so cut up because the cut end does absorb some water when exposed. If I heat fuse the cut ends it absorbs nothing.

[Doby]

I certainly hope u were not implying I don't know how to apply the stuff cause I have been there and done that a looooooooooooooooooooooooooong time ago. I seriously doubt u have slept as many nights in this hobby as I have. This stuff went out of style in the 80"s and I go well back of that!!!!

If you choose to take things personally....go ahead.

[96XP]

6) Toxic when gassing off.

7) Do not use as coffee whitener.

8) Makes great fake ice cream cones.

[MR2NR]

Boy I just cannot make ANY sense in using this nasty stuff.
1. It is insanely heavy compared to noodles
2. It can separate ur boat if u r not VERY careful in using it
3. It is messy sticks like glue any place or thing it touches
4. Unpredictable what the final end product will be after expanding
5. It is pure hell to remove from a hull
6. It is expensive
This stuff is a NO brainer, stay away from it period!

I added to your list :) I just couldn't justify the cost. I'm sure it works well if you have tons of the stuff for other projects but if your cheap the packing foam and noodles are the way to go.

[MR2NR]

Great you got me worried now... cutting a piece on all sides and putting it in water with a weight overnight to test this. Initial test show that surface adhesion with the water is a tiny bit more but as far as absorption I think it will be very minimal with a very clean cut of pool noodle. Now packing foam might have larger bubbles. But I think you are just holding water on the surface cut bubbles.