Loose kitchen sink

[ElectroTele]

Hi, we have a stainless steel top mount kitchen sink and a granite countertop. The caulk has disintegrated and the sink was shifting. I cleaned out all the old caulk and gunk. There is nothing keeping the sink in place. Obviously I need to caulk but would love to further stabilize the sink first. Just not sure how.

There’s no indication of brand. You can see from the pic of the underside there is a lip or flange along the sink edge with some holes in it.

any suggestions aside from just relying on caulk?

 

[Geofd]

Usually the bottom of the sink has a way to clip the sink to the countertop the clips would slide into a rail,orslot you could slide the securing screws/clips yours looks like it has holes in it don’t know the angle of the holes bumaybe you could glue wood tho the underside of the counter and use small wood lags with a socket in the wood.....be very careful what you use on granite it can stain ....this is just a guess it’s hard to see the angle of those
Holes

 

[Geofd]

Usually the bottom of the sink has a way to clip the sink to the countertop the clips would slide into a rail,orslot you could slide the securing screws/clips yours looks like it has holes in it don’t know the angle of the holes bumaybe you could glue wood tho the underside of the counter and use small wood lags with a socket in the wood.....be very careful what you use on granite it can stain ....this is just a guess it’s hard to see the angle of those
Holes

There are different caulks available also for stone and stainless you could check them also

 

[ElectroTele]

I think I get what you’re saying about the wood.... trying to picture it. As far as the angle of the holes, there isn’t very much of one - the strip of metal with the holes is very close to parallel with the lip of the sink but there’s clearly enough room for a few threads of a bolt. If I understand you, you’re suggesting to glue some wood to the granite with enough extending outward that I could run a bolt through it up to the holes... makes sense. Need to figure out the best way to glue wood to granite. Silicone seems to be the caulk of choice for both stainless and granite. Thx

 

[Geofd]

I think I get what you’re saying about the wood.... trying to picture it. As far as the angle of the holes, there isn’t very much of one - the strip of metal with the holes is very close to parallel with the lip of the sink but there’s clearly enough room for a few threads of a bolt. If I understand you, you’re suggesting to glue some wood to the granite with enough extending outward that I could run a bolt through it up to the holes... makes sense. Need to figure out the best way to glue wood to granite. Silicone seems to be the caulk of choice for both stainless and granite. Thx

you could also mount wood to the wood under your cabinet and use those holes as anchor points
I think mounting the wood to the counter top may work best just have to try and see what happens
Or call a granite co and explain your situation

 

[frodo]

is this the rail that you have?

 

[House Doc]

It looks like the hole was just a tint bit small and they just beat down the flanges to fit it in. The counter top installer wasn't worth his pay.
Here's my thoughts...
1. Take the sink out completely and clean any and all caulking from under the flange.
2. Set it in place so it's flat and square to counter.
3. Mask out the edges (on counter) with 2 or 21/2" masking tape exactly to sink edge.
4. Remove sink
4a. Put masking tape around edge of sink. Use a razor knife to trim tape exactly to edge of sink.
5. Put LARGE bead of silicone adhesive/caulk on the counter, just inside the tape.
6. Put the sink in place, lining it up with the tape. You want it to squish out (that's what the tape is for).
7. Put some weight in the sink (books, sandbags, etc.) Let it cure for AT LEAST 24 hours (48 hours would be better)
8. CAREFULLY use razor knife around edge of sink to cut the silicone and remove tape.
9. Reinstall drains and supply lines and enjoy!