Flex seal is used to stop leaks faster by blocking cracks and holes. On the other hand, silicone sealant is used to block gaps and seal surfaces from water damage. In this article, I will compare flex seal vs. silicone so that you can use the right product according to your need.
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Flex Seal vs. Silicone
Overview of Flex Seal
Flex seal is a sealant that is used to seal surfaces to block cracks and holes in order to make them leak free. It is actually a liquid rubber that you can use as a coating on a surface that has cracks and holes. Flex seal usually comes in as a spray can or in liquid form in a paint bucket.
The Benefits of Using Flex Seal
As flex seal comes as a spray and liquid, so you can easily choose the type you are flexible with. Whether it is spray or liquid, it is always very easy to use, especially the spray. To utilize them, you don’t need any specialist skills. It comes in various colors, so you can choose the color according to your working surface.
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Overview Silicone Sealant
Silicone sealant acts like a gel, but it is actually a liquid form of adhesive. This waterproof sealant is used to stop water leaks around different surfaces. It is used in many types of waterproofing jobs because of its water-resistant ability.
The Benefits of Using Silicone Sealant
Silicone sealant can maintain its adhesion qualities at high temperatures. It creates a strong bond that resists water leaks. It has different types of uses along with waterproofing. It is also used in electronic devices, automobiles, and appliances. In electronic devices and home appliances, it is used to keep sensors and cables in place.
Difference Between Flex Seal and Silicone Sealant
| Flex Seal | Silicone Sealant |
| Rubber based sealant. | Silicone based sealant. |
| It dries within 2 to 3 hours. | It takes around 30 minutes to an hour to dry. |
| It fully cures in 24 hours. | It takes 24 hours to several days for a full cure. |
| You can use a colorful flex seal, or you can color it to any color after fully cure. | It is not paintable because the paint will not stick to it. |
Which One is The Best? Flex Seal or Silicone Sealant?
If you are looking for a waterproof solution, then both flex seal and silicone sealant will perform equally. But both of them have some advantages and disadvantages over another one.
If you want to seal your cracks and holes but also want to match the sealant with the surface, then flex seal has many options, as they come in different colors. Silicone sealant does not have a color option because the color will not stick with it.
Suppose you want faster drying time, then silicone sealant is the clear winner because it dries within an hour. On the other hand, flex seal need 2 to 3 hours to dry properly. But in terms of curing time flex seal overshadow silicone sealant, as it only takes a day to cure rather than several days.
Read More: Flex Seal vs. Gorilla Spray
How Long Will Flex Seal Last?
It depends on the environment, the number of coats, and maintenance. But people have found that it lasts for many years without losing strength and without any damage.
How Long Will Silicone Sealant Last?
If properly maintained, depending on the environment and the quality of the sealant, it can last from 10 to 20 years without any problem.
Last Opinion
Both flex seal and silicone sealants are good for countless applications. But to choose between flex seal and silicone sealant, it should start with the application itself. Both of them are good waterproofing solutions.
But for areas that have direct contact with sunlight and moisture and where there is no need to paint, silicone is the best choice there. For areas needed to be painted and involve wood, in those areas flex seal is a better choice.
If you have any doubts about flex seal vs. silicone then leave a comment below.
