July 12, 2019 5 min read

Undermount kitchen sinks are excellent not only to provide your kitchen with an exquisite modern look but to also provide you with a lot of conveniences. Rusting and corrosion is something that cannot bother you a lot when it comes to undermount sinks because of the caulking used underneath during fixing. However, once the caulking loses its efficacy over time then your undermount sink is exposed to the rust of rust and corrosion.

Undermount Kitchen Sink

The area of concern here is that with the overmount designs rust and corrosion are mostly visible on the outer side and you can easily treat it. With undermounts, you need to keep an eye on the caulking on a regular basis to see if there is an issue and re-caulking is required or not.

To tackle this issue we have developed a brief guide for your assistance to keep your expensive and elegant looking kitchen as functional as ever.

kitchen sink

Rust Causes

Corrosion and rust can be caused by a number of reasons. The source of the problem here is a kind of oxidized metallic particular on or underneath the surface that has transformed into rust. The best materials that you need to use to prevent rusting and corrosion directly are Vikrell, stainless steel, vitreous china, and glass or enamel. These materials cannot rust or corrode on their own and any other metallic articles need to be introduced to start the corrosion process.

Rust Causes

Any cleaning utensils or dish rags left on the surface can start this rusting process even to the above-mentioned materials. If you leave the rubber mats on your sink then it will also start the corrosion process because of the deposits of hard water and soap. Moreover, any use of abrasive pads will also cause corrosion and rust to occur.

         Rust on the Drain

Rust on the Drain

This kind of rust can occur when the caulk underneath the sink deteriorates with the passage of time and it develops some gaps and cracks. Water or soap can seep underneath this caulk and it can oxidize to form rust right along the line of the drain. If you leave it unattended the rust formation can damage the surface of any material. This corrosion can also occur if the caulk installation is not done adequately. This type of rust is not caused by the manufacturing process of the sink.

   How Can Stainless Steel Sink Rust?

How Can Stainless Steel Sink Rust

Though stainless steel doesn’t rust on its own if you leave any utensil on the surface then this can become the source for corrosion. For this reason, stainless steel can also corrode in certain conditions. If your undermount sink has developed rust on the inside then it is because of the contents of the countertop in which it is installed. Furthermore, any fumes that are caused by household chemicals like cleaners, salt, lye, bleach, and various other hard water products for stain removal. For this reason, you need to use all those materials and chemicals which don’t involve any bleach products.

          Rusting Around the Cast Iron Lavatory Rim

Just like the drain rust, the rim of the lavatory can also develop some rust because the sealant will be compromised and the gaps and cracks start to occur. The primary reason for this is age or improper installation. If this issue is not resolved in a timely fashion that the caulking will get damages eventually. And corrosion will occur.

Rusting Around the Cast Iron Lavatory Rim

How to Clean Rust from Undermount Sink

To keep your undermount kitchen sink well protected against any corrosion or rust, there are some important steps that you need to take. We have listed them as follows

How to Clean Rust from Undermount kitchen Sink

  • You need to get rid of the existing sealant or caulk particularly if it has been installed for a long time. You need to make sure that you keep the rust remover out of contact from the countertop.
  • Moreover, you must make sure to clean all the affected areas with corrosion or rust with top quality rust removers as well as stain removers. But keep the chemical away from the surface of the sink.
  • You must also apply the coating to the rim area of the sink.
  • clean kitchen sink
  • Make sure you also apply some good quality touch-up paint. It will take care of all those corroded areas and ensure that you keep let them dry.
  • Also, ensure that you spray that soapy water on any of that silicon caulking to premature.
  • You need to run your finger covered with soap across the perimeter sink particularly on the caulk area.
  • Using a soapy towel you need to get rid of any excess residue or sealant.
  • Also, allow the sealant to cure for at least a couple of hours. After that remove the soapy film with the help of warm water.

Apart from Rusting

Apart from kitchen sink Rusting

Another problem that these undermount kitchen sinks have apart from rusting is mold. In fact, in the case of undermount kitchen sinks mold is a far bigger problem than rust or corrosion. The primary reason behind the development of mold is the lodged water right between the counter and the sink. This is the area where cement is holding both counter and the sink together. The water tends to get trapped there and it stays there for a long time.

kitchen sink rust reason

This trapped water will eventually lead to the development of mold or fungus issues in the joint. This is very difficult to clean particularly in the case of the undermount sink. With the help of adequate maintenance as well as knowledge, you can prevent the rusting process altogether. Mold typically develops from moisture and dark conditions that are present underneath the sink. This can cause leakage and your sink will start to malfunction as well. For this reason, you need to make sure that the silicon caulking stays intact.

Proper Maintenance and Care

Proper kitchen sink Maintenance

If you have undermount sink then you must keep a close eye on any signs of gaps or cracks. You must also look for any development of mold. Look for the joints and all those hard to reach areas both on the countertop as well as under it.

It is critical that you must carry on with this checking process on a weekly basis. This will ensure that you will not miss out on any of the first signs of those gaps and cracks. If you don’t find any mold or cracks then you need to call in a professional. Professional assistance will enable you to resolve these issues for good.

Proper kitchen sink care

There is no doubt that undermount sinks are by far the best-looking types of sinks. They provide your sink with modern looking elegance and they are also entirely invisible to the naked eye. But when it comes to maintenance they are a lot trickier as compared to other types of sinks too. Hence, you need to keep checking them for any issues.  This way you will be able to prevent them before they even occur.

Both mold and rust can cause problems for the overall working of this sink. Therefore, proper maintenance is mandatory. Particularly, if you want to ensure that your undermount sink lasts for a long time to come.

Leave a comment

Comments will be approved before showing up.

Also in News

Is A Single Bowl OR Double Bowl Kitchen sink better?
Is A Single Bowl OR Double Bowl Kitchen sink better?

September 01, 2019 5 min read

The sink in your kitchen is by and large the most used equipment. Think of it; you use it for cleaning, drying, rinsing, and even for drinking water. So with such a high functionality and usage, don’t you think it is time to upgrade your sink?
Read More
Mensarjor Undermount kitchen sink
Why Choose Stainless Steel Undermount Kitchen Sink?

August 15, 2019 4 min read

Undermount kitchen sinks are one of the best options for you to consider if you love to provide your kitchen with a modern and elegant look. These sinks are attached right underneath your kitchen’s countertop. It allows you to easily clean your countertop and sweep all the crumbs right into the kitchen sink. There are various advantages to this undermount design. Let’s have a brief look at them through the list below

Read More
Undermount vs. Overmount: A Comprehensive Comparison of Kitchen sinks
Undermount vs. Overmount: A Comprehensive Comparison of Kitchen sinks

July 05, 2019 5 min read

If you are looking to rebuild your kitchen countertop, you will have to decide what sink type you will use. Read on to find out all the enlisted advantages and disadvantages of undermount vs overmount sink and all the details that you need to consider before buying one.

Read More