I sealed my benchtop HF blast cabinet with caulk and clear Flex-Seal. Still leave it in a box just in case but the cabinet does not leak anymore.
Bruce
You can call them, they sell them direct.^^ Well they don't have that kit on eBay now.
Ok I have the older model. The mane cabinet is formed wit only one seam. Get a good shop vac. And a Dust Deputy.
http://www.acehardware.com/product/index.jsp?productId=51625686&KPID=19913726&pla=pla_19913726
View attachment 126264