Are the foams able to absorb moisture like a sponge?
The answer is no because our foams are all ‘closed-cell’ – sponge materials may be classified as ‘open-cell’: In closed cell foams the plastic is the only continuous phase (this is like having millions of small bubbles of plastic all bonded together) and therefore the gas in the foam is trapped inside the bubbles. In open cell foams both the gas and the plastic are continuous phases. In this case when you squeeze the foam you expel all of the gas from the structure, but when you release it (like a sponge) it sucks air back into the structure. Practically this means our closed cell foams will not absorb significant amounts of water or other liquids, which is great for buoyancy and for seals and gaskets.
