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20, February 2023

How often should you replace silicone sealant?

How often should you replace silicone sealant?

Silicone sealant is a popular material used in various applications for sealing and bonding purposes. It is commonly used in bathrooms, kitchens and other areas where water and moisture can be a problem. While silicone sealant is durable and long-lasting, it is not a permanent solution, and it will eventually wear out over time.

The frequency at which you should replace silicone sealant depends on several factors, such as the quality of the product, the environment in which it is used, and the maintenance routine.

Here are some key considerations to keep in mind when determining how often to replace silicone sealant:

Quality of the product:

The quality of the silicone sealant used is a critical factor in determining how long it will last. You must research well before choosing a sealant for use. Cheaper, lower-quality products tend to degrade more quickly, and may need to be replaced sooner.

Quality is also essential based on where you are going to use the sealant. For eg- If you want to seal your bathtub, you might want to use a high-grade waterproof indoor silicone sealant that lasts longer in that environment.


The environment in which the silicone sealant is used can also affect its lifespan. Typically, indoor silicone sealants last longer than outdoor silicone sealants.

Areas that are exposed to high levels of humidity or moisture, such as bathrooms or kitchens, may cause the silicone sealant to break down more quickly. Areas exposed to direct sunlight or extreme temperatures may also shorten the lifespan of the sealant.


Proper, timely maintenance can help extend the life of silicone sealant. Regular cleaning and inspection can help prevent mold and mildew growth, which can cause the sealant to deteriorate more quickly.

Additionally, avoiding harsh cleaners and abrasive scrubbing can help prevent damage to the sealant.

So, how often should you replace silicone sealant?

In general, it is recommended to replace silicone sealant every five to ten years, but this can vary depending on many factors.

If you notice that the silicone sealant is discoloured, cracked, or showing signs of wear and tear, it may be time to replace it.

Additionally, if you notice mold or mildew growth (which are more perceptible around white silicone sealants), this is a clear indication that the sealant needs to be replaced.

Replacing white silicone sealant can be a simple DIY project, but it's important to take the time to properly remove the old sealant and clean the area before applying new sealant.

This will help ensure that the new waterproof silicone sealant adheres properly and provides a strong seal.

Why does silicone sealant age?

Silicone sealant can age due to several factors, including exposure to UV light, temperature changes, moisture, and chemical reactions. Over time, these factors can cause the silicone to dry out, become brittle, lose its elasticity, and develop cracks, which can lead to a decrease in its effectiveness and performance as a sealant.

Additionally, exposure to certain chemicals or substances can accelerate the ageing process of silicone sealant.

What are the key drivers of outdoor silicone sealant’s ageing?

So, in speculation, there are several factors that can promote the ageing of outdoor silicone sealant, including:

UV rays exposure: The sun's ultraviolet (UV) rays can break down the chemical bonds in the silicone sealant, leading to the sealant’s drying, cracking, and brittleness.

Temperature changes: Exposure to extreme temperatures, especially repeated cycles of freezing and thawing, can cause the weatherproof silicone sealant to expand and contract, leading to cracks and gaps.

Moisture & humidity: Exposure to water and high humidity levels can cause the sealant to swell and shrink, leading to loss of adhesion and cracks.

Chemical exposure: Exposure to chemicals, such as pollutants in the air, can cause the sealant to degrade and lose its effectiveness over time.

Mechanical stress: Constant movement or vibration of the surface where the sealant is applied can cause the sealant to crack and lose its ability to provide a tight seal.

Why Bondzil silicone sealants are best for caulking?

Bondzil sealants are often considered to be among the best for caulking due to their superior adhesion and flexibility. They are designed to bond to a wide variety of surfaces, including wood, metal, and masonry, and can withstand exposure to water, extreme temperatures, and UV radiation.

Additionally, they are easy to apply and can be painted over once they have dried, making them a popular choice for both indoor and outdoor caulking applications.