EPS 25 lbs. per sq. inch? Found supplier with 4" thick 2' x 8' sheet

Sorry–looked some in a search but I couldn’t find anything that answered

Is “25lbs psi” equiv to 2 lb EPS?

Their price is 4 inches thick at 2’ x 8’ for $23.35 per sheet, 3 inches thick at 8’ x 4’ for $35.09 (for 2 fish that ain’t bad!)

ummm, i think that would be a really really heavy board. 25#'s per square inch. Think about it…

Since psi isn’t a measure of density, it is impossible to say.

Assuming it were the weight/area of a 3" billet, that would work out to 14,400 lb/cu ft which is clearly not right for a density for a surfboard core.

Below is a datasheet I found for Insulfoam EPS. If you find out what physical characteristic is being quoted as 25 psi, you could interpolate and have a pretty good guess at a density equivalent.

I’m looking at that chart and thinking the guy was talking about the compressive strength, which puts it right in the ballpark for 2#

Thanks for the help, TM.