Well, I can’t be for certain, but I did not get my product from Ace. It is closed cell foam that is non water absorbent; it looks feels and acts a lot like the foam that is in your bulkhead. The softer foam that I have experimented with only worked for a short time before it compressed and was waterlogged. Please keep in mind, my product is only $12 and I will give a guarantee, if it does not work I will refund.
I outfitted much of team Jackson at Fibark, and there response was very positive.