I'm sure all of you have seen these interlocking mats:
I make my own packaging for my artwork and use some stiff foam to hold everything together in the boxes I ship out. I am specifically using closed cell foam because of its great properties for packaging. The foam I have is very expensive and not as high quality as the foam floor mats in my basement, so I took a spare mat and successfully cut it into foam cutouts for my artwork. There are a lot of companies that use very similar foam it seams. For example, this packaging for a USB adaptor I recently bought is almost identical to the floor mats:
These mats are available at far better prices (1/10th of the cost of what I currently pay), but the one thing that annoys me is the pattern on the top. I tend to glue and layer my foam when one sheet is not enough. I have seen some foams like this on Amazon which have a flat surface on both sides:
But these mats are coated with rubber grip, so it defeats the purpose. What this does prove is that factories DO manufacture these closed cell foam mats at affordable prices without the grip on top.
The interlocking aspect of these mats also makes it feasible to reuse offcuts by locking them together, making them the perfect solution for product packaging foam. Where can I get mats without a grip pattern that can be cut for packaging? Also, as the thickness is a little too thick for my liking in some cases, are there any sellers that sell mats, say, half the thickness?