8X8 LED Grid Feedback

Check out my progress.

Now I have some space between the Vcc lines and the perfboard. Can I fill that with anything? I was thinking something along the lines of expanding foam.

http://www.homedepot.com/p/GREAT-STUFF-16-oz-Gaps-and-Cracks-Insulating-Foam-Sealant-162848/100003351?cm_mmc=Shopping|Base&gclid=Cj0KEQjw-b2wBRDcrKerwe-S5c4BEiQABprW-FOGulWIRvvJsdTnK10NxUvigwvuAe1Og94MR157FbgaAhPt8P8HAQ&gclsrc=aw.ds

It is more your circuit than the foam that is of interest. It is an unusual requirement so post a picture of what you want to fill and say why please.