How to Caulk a Stainless Steel Kitchen Sink – Follow These Simple Steps

Using granite as countertops in the kitchen or bathroom area is most common. Its beautiful surface gives the area a modern look.

And a stainless steel kitchen sink perfectly goes with any shade of the granite. However, the question is, how to caulk a stainless steel kitchen sink?

The situation can be of two types. Either you are replacing your sink from an existing granite countertop or the sink and the countertop both are brand new.

For both situations, you’ll need to prepare your countertop and then follow some common steps.

These small steps will help you successfully caulk your stainless steel kitchen sink.

how to caulk a stainless steel kitchen sink

How to caulk a stainless steel kitchen sink

Preparation for Replacing an Old Sink

The first thing you need to do is prepare your countertop.

To help the sink set in its place and to keep it watertight, kitchen sinks are sealed to the countertop during installation.

But over time this seal can dry out, shrink or crack. Thus water can leak beneath the sink area and cause damage underneath the countertop.

Hence the need occurs to dig out the caulk and put a new seal around the countertop.

Different materials can be used as kitchen sink sealant. Such as latex or silicone. Each one needs a different solvent to dissolve it.

You can use 3M caulk remover or Mckanica silicone caulk remover gel and wait for 2-3 hours or more to loosen up the caulk.

Before this, you need to be very sure about the type of caulk that was used previously.

If you are uncertain about it, then it’s better to dig it out than to dissolve it. You can use a utility knife or scraper with a sharp blade to dig out the old caulk.

But be very careful while doing it. Put only the necessary amount of pressure to scrape the old caulk out.

Otherwise, you could damage the sink or the countertop. In this way, most of the caulk should come out easily, although you might need to use tweezers in a number of parts to pull out some bits.

Caulk Stainless Steel Kitchen Sink

Preparation for Installing a Brand New Sink

For a new countertop first, trace the outline of the sink on the countertop.

This will enable you to determine the size of the hole, that you need to make on the countertop. Cutting a hole through the granite is a difficult task.

It requires steady hands with experience and expertise. So, seeking assistance from a technician in this process is highly recommended.

Just be sure about the exact measurement of the sink that will go into the countertop.

Otherwise, it won’t fit properly, and fixing this problem will be harder than you think.

Then mark the parts and go on with drilling the granite where the holes are required to set the sink.

Cleaning Before Caulk Application

You can clean the granite top with soapy water but make sure to dry it carefully. Otherwise, any remaining water will prevent the seal from being strong enough.

A better option is using rubbing alcohol. This can be used to remove any residues or mildew that might prevent the caulk from making a good seal.

For reusing the old top see beneath the edge of the sink. You’ll find greasy dirt that has been forming for days.

It must be cleaned away before applying the new caulk.  You can use denatured alcohol as it dries quickly, leaving the surface ready for applying new caulk.

Caulk Application

After the cleanup using a clear caulk can make the seal look beautiful. As it matches with the countertop and the sink.

Apply a latex or silicone caulk via a tube that has a small hole cut in the tip. A larger hole can lead to too much caulk coming out at a time.

There are lots of different brands available in the market. For example- AST-RTV 27106 Clear 100% Silicone Adhesive, Dap waterproof silicone sealant, Gorilla 100%, Permatex 85913, etc. You can buy whichever is available near you.

When applying the caulk against the edge of the counter where it joins with the sink, do not hold it straight.

Hold it in a 45-degree angle to squeeze out even amount of caulk at a time. To ensure a precise application, use painters tape to create a clear line.

Apply the caulk in one long continuous strip with no gaps.

Finishing up

Position and fix the sink from underneath. Use the clamp and screw in the nuts tightly to hold the sink.

Smooth out the caulk against the sink and countertop to from the final seal. You can use a special tool or just use your finger to smooth out the caulk finely.

But take a water bowl and wet your finger first that will help you to glide more easily over the caulk. Be gentle while smoothing out.

Connect all the supply pipes and other parts. Keep the area dry for at least 24 hours, and after that, you can clean the stainless steel kitchen sink and start using it as usual.

I hope this guide will help you to caulk your stainless steel kitchen sink. If you have any suggestion, please don’t hesitate to comment below.


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