ECN Forum Forums General Topics of the Trade Non-US Electrical Systems & Trades Safest socket system for wet pottery studio?

I have found MK MASTERSEAL PLUS 13A 2 GANG SWITCHED SOCKET (98279) £49 for each double - to protect sockets in pottery studio. Some sockets not being used.. is it safe to just put cover plate over and use silicone sealant on unused ones in area where wet spillage is likely? Setting up a new professional studio.