Is PVC foam board safe?

[ScottF]

Hi! I watched a Reef Builders video where he was using PVC foam as a baffle to spin chaeto. I was thinking about doing something similar in my fuge. In general, is using PVC foam safe? For this experiment I'd rather try to wedge some foam in there than glue acrylic to my glass sump.

I was looking at using this:

 

[KrisReef]

PVC should be ok.