Hey yall. Building a new tank for tater tot. Is osb chill to use? Or do u need plywood? Also if I used osb what do I seal it with? And I'm also doing a spray foam backround.. should I use dyeloc or grout to seal it? And do I cover the dryloc/grout with a diff sealant.... sorry for so many questions....I js don't want to do it wrong...