I'd like to replace my kitchen sink. It is a drop-in porcelain, mounted in a granite tile countertop. It has been there almost 20 years. The tile is in great shape and I would like to avoid damaging it.
I tried to cut away the silicone from the sink and slip a putty knife under there to loosen it, but I couldn't create any gap to get the knife in. I also tried to use heat to loosen the silicone, and a mallet to jiggle the sink a bit from the bottom. Nothing has worked.
Any advice on working the sink loose while avoiding tile damage?
Best Answer
A kitchen sink is usually relatively large and when made of porcelain it's probably pretty heavy. The putty knife is a good idea but you're fighting against not just the silicone but also the weight of the sink. Also make sure you're not fighting against the plumbing -- the drain or the faucet supply pipes could hamper your efforts.
Find a way to apply some lifting force to the sink while trying to cut the caulk with the putty knife. An assistant could push up on the bottom of the sink, or if the drain plumbing is removed, can lift the sink from above by grasping through the drain hole(s). Another possibility is to use a lever or jack of some kind. Take care with this approach. It sets up a "weakest link" challenge: if things go right the caulk will fail, but if things go wrong the sink may break or the floor of the cabinet may be damaged. Proceed with caution, increasing the force/leverage gradually.
Whichever method you choose for lifting the sink, try doing so at all four corners (one at a time). One of them may be adhered weaker than the others; once you get one area loose the rest will follow more easily.