How long does silicone last outdoors?
Silicone is one of the most popular sealants used in the construction industry. It has excellent waterproofing and sealing properties and is resistant to a wide range of environmental factors. But how long does silicone last outdoors?
The Lifespan of Silicone Sealant
The lifespan of silicone sealant can vary depending on several factors, such as the quality of the sealant, the environmental conditions, and the application method. Typically, silicone sealant can last between 20-25 years under normal conditions. However, some high-quality silicone sealants can last up to 50 years.
The Effect of Environmental Factors
The lifespan of silicone sealant is heavily influenced by environmental factors such as sunlight, moisture, temperature, and pollutants. Exposure to the sun's UV rays can cause the sealant to degrade faster, reducing its lifespan. Similarly, exposure to moisture can cause the silicone to break down or discolor over time. Extreme temperatures can also have an impact, as the sealant may expand and contract, causing it to pull away from the surface. Finally, pollutants such as chemicals, pollutants, and salt can contribute to the degradation of the silicone as well.
When to Replace Silicone Sealant?
If you notice any signs of wear or damage to your silicone sealant, such as cracks, gaps, or discoloration, it's time to replace it. It's important to keep in mind that even if your silicone sealant looks good from the outside, it may have degraded internally due to exposure to environmental factors. Anytime you plan to re-seal a surface, it's important to remove the old sealant and replace it with fresh silicone sealant.
How to Prolong the Lifespan of Silicone Sealant?
While you cannot completely prevent the degradation of silicone sealant over time, you can take some measures to extend its lifespan. One effective way is to clean and maintain the sealant regularly, removing any debris or contaminants that may contribute to its breakdown. Another way is to apply a silicone sealant with UV resistant properties, which can increase its resistance to sunlight.
Types of Silicone Sealants
There are different types of silicone sealants available on the market, each with specific properties and applications. Some of the common types include:
Acid-Cure Silicone Sealant
This type of silicone sealant is commonly used for sealing applications in areas such as kitchens and bathrooms. It cures by reacting with moisture in the air and forms a flexible, durable seal. However, it emits acetic acid during curing, which can corrode some metals.
Oxime Silicone Sealant
This type of silicone sealant is often used in applications where an acidic sealant cannot be used. It emits a neutral odor during curing and bonds well to a wide range of surfaces. However, it can be more expensive than acid-cure silicone sealant.
Neutral Cure Silicone Sealant
This type of silicone sealant is ideal for sealing applications in areas exposed to direct sunlight. It has excellent UV resistance and does not emit any acids during curing, making it less likely to corrode metals. However, it has a longer curing time than other types of silicone sealant.
Conclusion
In summary, silicone sealant can last between 20-25 years under normal conditions, but its lifespan can be shortened by environmental factors such as sunlight, moisture, temperature, and pollutants. To prolong the lifespan of silicone sealant, it's important to maintain and clean it regularly and consider using a silicone sealant with UV resistant properties.