Applying Caulk Over Caulk

Does Caulk Stick to Caulk?

In Construction by Giovanni ValleLeave a Comment

Affiliate Disclaimer: Some of the links below are affiliate links. As an Amazon Associate, I earn from qualifying purchases.

Whether you’re a professional worker or the handyman around your home, caulk is extremely useful in various situations. Caulk is a substance used to seal joints or seams in the event of leakage in numerous structures and piping. Caulking can last for approximately five years, but what do you do when you need to reapply it to the same spot?

Does caulk stick to caulk? No, caulk does not stick to caulk. Your best bet is to remove the old caulk from the area entirely and reapply with the new caulk. It is essential to assess what type of caulk you’ve used and are planning to use because silicone caulk can be tricky to remove and reapply.

After researching about the removal and reapplication of caulk, questions arose about the different types of caulk and when you should use each type. These questions deepened when consideration was given to caulk’s best uses and how to solve problems with caulk. After extensive research, here are the answers to those lingering questions.

The Intricate Details of Caulk and Caulking

While caulking is a reasonably simple task and doesn’t require any prerequisite knowledge, it is crucial for you to understand the different types of caulk. You should also know how to apply caulk to surfaces correctly. Knowing this information will help you decide how to resolve your issue best and will be beneficial in assessing the situation.

Types of Caulk: Which is the Best for You? 

It is imperative to research what type of caulk is best for your situation before purchasing materials for your home improvement project. There are particular types of caulk for:

  • Bathrooms
  • Kitchens
  • Concrete
  • Gutters
  • Molding
  • Rooves
  • Windows
  • Plumbing
  • Other indoor and outdoor jobs

For areas closest to wet surfaces, the best types of caulk are silicone and polyurethane caulks. These types of caulk do not crack or decay when exposed to water or wet environments. They are very flexible, and they create a perfect seal. You should use these types if you need work done around:

  • Bathtubs
  • Toilets
  • Sinks
  • Windows

Acrylic caulk is used to fill gaps in molding around:

  • Indoor rooms
  • Doors
  • Windows

It dries hard and is not flexible. It can be painted over and is known as the painter’s caulk since it is often used by painters who are looking to fix blemishes in wooden finishes before they begin painting.

Polysulfide caulk is used when caulking must be done underwater. It can withstand total immersion in water and is often found in:

  • Pools
  • Fountains
  • Boats

It can withstand prolonged submersion while remaining durable and reliable.

How Do You Apply Caulk?

Once you have chosen the type of caulk you need to use, some tools are required for application. These tools include:

A good caulking job begins with a clean surface, so you should remove any old caulk first. Cleaning the area will help ensure a tight seal that will prevent any future problems. Tape the region to improve the result and cut the nozzle of the hand-held caulk tube.

If your caulk tube is rigid and stiff, put the caulk tube in the caulk gun for application. If your caulk tube is squeezable, then the caulk gun is not required but recommended to prevent any discomfort in your hands. A line of caulk is called a bead, and the size of the bead depends on where you cut the nozzle. For a wider bead, cut further up on the nozzle.

Place the nozzle at a forty-five-degree angle for the best application and work in a continuous direction. Once the application is complete, smooth out the bead of caulk with a caulking tool to create a neat look, and remove the tape before the caulk starts to set.

The goal is to smooth the bead along the joint to make it look neat and professional, not wipe away excess caulk. Caulk fully dries within twenty-four hours of application, and once it cures, you can use a putty knife to scrape away excess caulk.

Can You Put a Second Layer of Caulk?

Putting a second layer of caulk is fine for some types of caulk. When using silicone caulk, your best bet is to remove the first/older layer of caulk before putting on a second layer. Nothing sticks to silicone, not even silicone itself. Therefore, the application of your second layer of silicone caulk would be pointless and create more of a mess for you.

However, removing the first layer of caulk is not always necessary. You can apply a wider bead of caulk over the first layer, which will cover the first layer entirely and stick to the area’s uncaulked sides.

However, you should test to see if the second layer of caulk will stick by applying it to a small area and surveying the results. Be sure to rid the surface of any oil and dirt. If the area is unclean, then the caulk will not stick. If the second layer of caulk sticks, then it is safe to apply a full second layer.

Why Should You Caulk?

Not only is caulking a great way to save money since the materials are inexpensive, but it also defeats many home improvement issues that may annoy you persistently. Here are some of the problems that caulking can help solve at a cheap cost.


Sealing leaks around the doors and windows through caulking is the best way to beat drafts and decrease your carbon footprint. Also, it can diminish home energy costs and better your home’s energy efficiency.

To get rid of drafts in your home, you should use acrylic latex or vinyl latex caulk. Acrylic latex caulk performs best in dry environments for an extended period (about fifteen years). Vinyl latex caulk is best used in damp environments over a shorter period (about five years).

Bugs and Rodents

Concrete repair caulk can be used for sealing gaps and cracks in:

  • Concrete 
  • Brick
  • Metal
  • Stucco
  • Stone

Homeowners commonly use it for repairing blemishes in foundations or basement walls, which are where bugs or rodents enter your home. It dries hard and can be painted over since it does not absorb moisture. It is designed for indoor and outdoor use and will eliminate your worries about pest or rodent issues.


Moldings and baseboards are challenging to measure and get a perfect fit for your home accurately. Often, you end up with annoying, noticeable gaps between, above, or below moldings and baseboards. When you want to close that gap, you can use acrylic caulk to fill in those small spaces.

This type of caulk dries very quickly, and you can paint it about six to eight hours after application. It comes in a variety of colors, so you can find the perfect match to your floors without it being noticeable or an eyesore.

Caulking is a great way to handle minor home improvement issues and build your skills for projects around your home. While layering caulk may not be the best option, applying one caulk layer is often enough to get the job done and solve various issues around your home. Although caulk does not stick to caulk, it is easy to remove and reapply.

Share this Post

Leave a Comment