Thanks. I'm in Canada. Does this look right? (Search polyethelene foam on amazon.ca).
PROTIP Bubblehead, when typing a reply, after an unknown period of time your login "session" times out and your post goes in as "Submitted by -" If you need time to compose, do it in notepad or somewhere ...
Yeah, the time-out has caught me a few times. Dinner, barking dogs, whatever. I'm not really concerned when unattributed. Anyway, no, the neoprene foam at the Amazon link does not look right. Neoprene foam will be much softer and more prone to being torn by things poking at it. Most importantly, I'm sure that it will be quite a bit heavier.
The link below has the correct stuff on Amazon - it doesn't say the exact density you're getting, but it will probably be good. This is the type of foam used in quality packing, like when you get a box with (for example) 6 stage microphones in it, all with individual shapes cut out to protect each individual mic. (Or, in gun cases, like everyone at the Amazon link comments is talking about.) So, this Amazon stuff should work. Make sure to stick with the polyethylene, not polyurethane. I just checked measurements, one 54x16x2 inch sized piece should do one side of the center seat with little waste, as you can cut lengthwise and glue together to end up with a blank chunk 54x8x4 inches. The 4 inch thichess is just right to come out to the edge of the seat. You can go 1/2 inch thinner if you want it slightly recessed under the seat lip, but I wanted max possible floatation. Things do get expensive, so you can lay what you need out on paper to buy the right amount while minimizing waste. It is OK to butt-seam the pieces if desired, and when laying up thickness, offset the seams so they don't line up, like this. Or if you want to spend more, just buy more and avoid the butt seams.
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https://smile.amazon.com/Case-Club-Closed-Military-Grade/dp/B015JRXH1W/ref=sr_1_2?dchild=1&keywords=polyethylene%2Bfoam&qid=1591621464&s=sporting-goods&sr=1-2&th=1
You might want to price out the factory rather than Amazon, the price below gets you a bigger (24 inch wide) chunk for less money, not sure about shipping. You get more choices with size, density and color and things might be cheaper. You can get the foam below in differing densities - the less dense, the more likely to "dent." I didn't search to see if there is a Canadian equivalent company somewhere, but at least this is close to the border. Below is what I purchased.
Foam Factory Inc · 17500 23 Mile Road · Macomb, MI 48044 US · info@foambymail.com · Phone: 586-627-3626
Here is what I bought most recently to make some additional floatation for my side seats,
Product Quantity Price Subtotal
2.2LB Polyethylene - 54x24 - 2"
PECOLOR: Charcoal $43.99
And having gone out to measure the boat, I probably timed out agian this time, we'll see.
Just making a post so that the thread gets logged with a new post in case John C. was watching for one.