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What Caulking to Use on Exterior of House?

What Caulking To Use On Exterior Of House

In many instances, the exteriors of the homes will often develop cracks that need to be sealed. This is because the cracks can harbor insects, rodents, and snakes, not to mention that they can also let moisture into the house.

This is where the caulks come. These are basically waterproof filler and sealants which are used in building work and repairs. Owing to the differences in the various parts and components of the home, it is necessary to employ the right caulk for the right part of the room.

What is the Best Caulking for Use on Exterior of House


The exterior of the home is particularly prone to the risks of cracks, probably much more than the other parts of the typical home. It is for this reason that it is necessary that you obtain the right caulk for this said portion of the home.

Type of Caulk for Homes Exterior?

Listed and explained hereunder are the types of caulks which are better suited for the home exteriors:

Exterior Caulk

This kind of caulk is suited for outdoor trim work and the installation of new windows. It is on the whole resistant to ultraviolet radiation and therefore protects the interior room occupants from the harsh external conditions. This is the caulk to choose if you are wary of your safety and well-being especially with regards to the harmful radiation from the sun. You may use caulking gun for getting best result.

Fire Retardant Caulk

Some exterior parts of the typical home are generally more prone to the risks of fire outbreaks. These include the vents, heating ventilation, and air-conditioning ducts and the areas around the wires. With this kind of caulk, it is possible to seal these fire-prone parts of the home. What’s more? It is also possible for you to wrap the framing gaps, fireplace, and the chimneys.

Generally speaking, this fire-retardant caulk is manufactured using special materials which are famed for their efficacy in blocking fires besides being non-combustible. This is not to mention that they withstand high temperatures reliably.

Mortar Caulk

From time to time, the exterior walls and parts of the home are susceptible to cracks and leaks. The bricks, concrete, mortar, and stucco are particularly vulnerable to this issue. Due to the impressive ability of the mortar caulk to withstand high temperatures, it is by far the most recommended for sealing such cracks. It blends well with the textured surfaces to prevent the caulks from being seen easily by others.

Sanded Caulk

To fill gaps on the larger joints, it is necessary to utilize the sanded caulk. It has the ability to fill spaces that measure 1/8 inches or bigger. This type of caulk appears rough and grainy and also adheres well in wet areas.

Molding and Trim Caulk

Lastly, comes the molding and the trim caulk. This one fills gaps which exist in between the walls and boards. In all, this type of caulk has a quick dry time and is also paintable. You might want to make use of this type of caulk to seal cracks which may arise while installing things in the buildings.

Does Exterior Caulk Need to be Painted?


YES, they have. This is however dependent on several factors. The following are some of the main factors which underlie such a need:

Exposure to Water and Outdoor Elements

You might want to paint the exterior caulk if the area in which it is used is exposed to the water or other kinds of outdoor elements. Such a painting is to enhance the ability of the caulk to resist the percolation of water into the home. Be sure only to employ the oil-based paints as they are the ones that are better placed to prevent the seeping in of water.

Weak Caulk

Not all caulks are created equal. Indeed, there are some caulks are weak, not water, crook, or shrink proof. These kinds of caulks are more vulnerable to the risks of water damage, air leakage, and the growth of molds. They badly need to be painted to be able to overcome these challenges and make them better suited to discharge their roles.

The Need for Matching

Lastly, there might also be the need to match the exact colors of the caulk and that of the adjacent surfaces. This can only be made possible only if the caulk is paintable. It is for this reason that you badly want to look for that kind of caulk which is paintable.

Frequently Asked Questions

Should you use caulk around exterior lights?

You should caulk around exterior lights to seal them from water. Caulking around exterior lights will also protect you from having bugs enter by coming in around the light fixture. Always use a high quality caulk that is siliconized so you can get a smooth finish when you apply it.

How do you caulk exterior lights?

Put the caulk into your caulk dispenser and make a smooth bead of caulk around the exterior portion of the light. Run your finger or a caulk smoothing tool over the bead of caulk to press the caulk into the cracks and create a tight barrier.

How long should exterior caulking last?

A good caulk has to last the longest duration of time. Most good caulks last around 10 years, give or take. Their overall lifespan, however, varies due to a number of factors. Severe weather conditions, physical damages, extreme impacts, and encroachment by animals are just but a few of those. You might, therefore, want to take great care of these materials for a longer lifespan.

Final Word on Caulking to use

As you may well have noted, the choice of the right caulk for your exterior makes or breaks the situation. This is because these materials come in various shapes and forms. These variations determine to a great extent their lifespan, ability to endure strong impacts, and overall physical appeal.

It is therefore in your best interest to invest much of your time to find the one that is more likely to bring you a higher value for money. We wish you all the best in your search for and use of the best type of caulk!

About Lisa Bohrer

Lisa is a native Texan who says she wears many hats. She is a wife, mother, grandmother, farmer, animal lover, fisherwoman, gardener, and college student. Lisa is a sophomore at Liberty University where she is taking classes to earn her Associates Degree in Creative Writing. She and her husband of 35 years fill their days with life on the farm raising goats and chickens, and then most evenings she can be found at the computer writing, or researching a topic that has piqued her interest.

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