silicone caulking for round stainless steel sink

[toastie]

Bought a round stainless steel sink that is top mounted, the manufacture recommends silicone caulking to hold it down, there are no clips, just the silicone. My question is, in a RV is just silicon good enough to hold the sink down, The manufacture advertised this sink for rv’s and boats............thanks

[Lance M]

It depends on what the bonding capabilities of the silicone are. I would not hesitate to use 3M Hybrid 760 adhesive/sealant. Or the normal 3M polyurethane 550 adhesive/sealant.

[lewster]

There are several high grade industrial silicone formulas around that are not available to the general public. I would never use the stuff that the hardware stores or big box guys sell in any RV.

Given that, I would stick () with a quality polyurethane like SikaFlex 221. It comes in a nice grey that will compliment the stainless sink nicely. This the same sealant that the factory uses when bonding the exterior panels together prior to riveting. I use tone of the stuff and it is a superior adhesive/sealant.

[cameront120]

Silicon was strong enough to build my 30 gallon aquariums with, so no doubt it'll hold your sink in place.

[SpaceEgg]

Originally Posted by toastie

Bought a round stainless steel sink that is top mounted, the manufacture recommends silicone caulking to hold it down, there are no clips, just the silicone. My question is, in a RV is just silicon good enough to hold the sink down, The manufacture advertised this sink for rv’s and boats............thanks

Sure, silicone would work, just like all the other suggestions here. They're all waterproof by design. What I've found is that silicone is raunchy to remove, which is why I stick to polyurethane sealants. These seem to weather well and when it's inevitably time to repair or replace the sink, you'll be happier you used the polyurethane as it will make your job that much easier in the future. Same price too. That's my 2c.

[TG Twinkie]

There is a product called LEXELL out there. It is clear like silicon and really sticks to stuff. I think it would work to hold the sink. Century lumber near me carries it.
It doesn't say silicon anywhere on the label. Not sure what it is.

[Wsmith]

GE 7000 or

equivalent

You can get it at most glass stores. It cures to touch in 15-20 minutes