Yes, standard WD-40 multi-use product is generally safe on porcelain ceramic surfaces and will not chemically etch or dissolve the fired ceramic glaze. However, using it on a toilet bowl or sink is generally discouraged because it is an oily petroleum-based solvent that leaves a slippery residue, attracts dirt, and fails to clean hard water scale or stains. If you accidentally spray WD-40 on porcelain, clean it off using standard dish soap and warm water. Verification: Wipe the porcelain surface with soapy water and check that it feels clean and non-greasy to the touch.
1 votes
Marked as accepted