EVA & Other Foams
EVA & Other Foams
Is EVA foam the same as craft foam? What about "fun foam"?
Yes, craft foam or "fun foam" sheets ("Foamies" is a craft foam brand name) is EVA foam. "Puzzle mat" tiles often sold for garage and playroom floors are generally EVA foam (although some brands have a plasticized layer on the outside that make them unsuitable for crafting).
Can you paint EVA foam?
Yes! Many different types of paint and pigment will adhere to EVA foam.
However it is best to prime or heat-seal EVA foam before painting otherwise the foam will soak in more paint than needed, resulting in a spotty finish and a lot of wasted time and material.
EVA is often primed with materials such as Plastidip, Flexbond, and sometimes even white glue.
How do you smooth EVA foam?
There are several different ways to smooth EVA. The first thing is to be as careful as possible when joining edges. Seams can almost disappear if attached slowly and carefully.
Ragged edges can be sanded and shaped with the sanding drum on a rotary tool.
Smoothing large areas can be done by heat-sealing with a heat gun (heat-sealing will cause some shrinkage of the piece), covering the foam with a thermoplastic such as Worbla, or priming with several coats of a primer such as Flexbond or Plastidip
How do you shape foam?
Heat shaping L200 will cause L200 to expand and become softer.
How strong is EVA and other foams?
What is the difference between Form-Lite and Hard-Lite EVA Foam?
What is the difference between L200 and EVA foam?
L200 is a closed cell foam similar to EVA. It has a long history of use in the SFX and movie industry.
The biggest difference between L200 and EVA is that EVA shrinks when heated and L200 expands. Therefore a common trick in EVA foam smithing such as cutting a line and then using heat to cause the cut to expand and look machined will NOT work with L200. Cuts or scratches in L200 can actually be sealed with heat.
Do I need special tools to cut foam?
A hand-held sharpener is very helpful for extending the life of your foam cutting blades or scissors.