[Russell Miller]

Here are some links to the four largest manufactures of the Foamed PVC that are available in America : CELTEC , SINTRA , KOMATEX and TROVICEL . The CELTEC brand is stocked at TAP Plastics . It is easily cut to size, or TAP can cut it for you. I don't recommend using anything thinner then the 1/4" (6mm) for outdoor use.
Russ Miller