What Happens If Flex Seal Gets Wet Before It Cures: A Complete Guide
Flex seals are well-known for creating a thicker rubberized sealant on various surfaces. This versatile sealant dries quickly and provides increased protection to the applied area. Once it is dried properly, water, air, and moisture can’t penetrate the surface.
But what happens if flex seal gets wet before it cures? A small amount of moisture or water spilling will be less likely to cause any problem if it already passed 30 minutes or longer. But, it is more likely to be partially or significantly damaged if water comes from a high-pressure water hose or runs through the gutter.
What Happens If Flex Seal Gets Wet Before It Cures?
A Flex seal won’t dissolve or wash away even if it gets wet before it cures. Generally, this popular rubberized sealant dries pretty fast.
It will create a thin layer (look-like skin) within thirty minutes. If it gets wet after 30 minutes of application, a small amount of moisture or water spilling is less likely to affect it.
But of course, you can’t overlook the humidity, temperature, and exposed air conditions. Sometimes, creating that thin layer may take more than 30 minutes.
As long as the flex seal is not concentrated or moving too much, it won’t be too much affected by water.
However, it is more likely to be partially or significantly damaged if water comes from a high-pressure water hose or runs through the gutter.
Even if the flex seal already creates a thin layer, this type of water will surely affect the sealant.
The simple rule is to keep the flex seal safe from everything until it cures fully. Otherwise, its effectiveness will be compromised.
How Long Does Flex Seal Liquid Take To Cure?
Flex seals generally become dry within 2-3 hours. But, the average cure time for flex seal is around 24-48 hours.
However, the dry time can be longer or shorter based on various factors, such as temperature, humidity, coating thickness level, etc. Let’s know one by one!
i) Air Circulation
For instance, if the surrounding environment has a higher air circulation, the seal will dry faster.
Usually, flex seals dry faster outdoors than indoors. The moisture in the solution will evaporate more quickly.
The ideal humidity level for flax seal is between 30% and 50%. A slightly increased humidity level can decrease the cure timescale.
ii) Coating Thickness Level
Most experts recommend applying several thin coatings of flex seals to refill cracks or holes.
You can’t apply the second coat until the first coating is dry enough and hard. Otherwise, the bottom coating will take more time to carefully.
The curing period will be lengthy, and the bottom sealant may need to be more effective.
Hence, several coating layers will take more time to dry and cure.
iii) Temperature
The range of flex seal cure temp can be anywhere from -80 to 350 degrees Fahrenheit. A cool, dry environment is better for applying flex seals.
However, most experts apply flex seals when the temperature is between 32 and 120 degrees Fahrenheit. This will get the optimal result and make your seal more effective.
iv) Cracks Or Holes Size
What is the diameter of the cracks or holes? A large amount of flex seal paste needs to be applied if the holes or cracks are too large.
Hence, it will take more time to dry. All the moisture must get off from the solvent to make the sealant hard and dry.
How To Make Flex Seal Cure Faster?
The average flex seal cure time can be anywhere between 24 hours to 48 hours. If you apply the rubberized sealant in an enclosed area, the curing time might be longer.
1. Increase Airflow
The higher the airflow, the faster a flex seal will cure. If you apply flex seals indoors, open the windows and turn on your ceiling fan or table fan.
For faster drying, you can use a hairdryer. It will blow low heat or air to speed up the drying process. But don’t depend entirely on it as it is not too effective.
2. Apply in Dry Conditions
Do you want to apply flex seals outdoors? Choose sunny and dry weather.
It must be fully dry if you plan to apply the rubberized sealant on a recently worked area.
Besides, the area should be free from rain, snow, sleet, or hail. Otherwise, the seal will take more time to cure. Wipe any moisture or water from the surface before applying the solution.
3. Use A Heat Gun Or Blow Dryer
You can use a heat gun or blow dryer on lower settings to evaporate moisture from the flex sealant faster.
But be careful not to apply direct heat on the sealant area. Otherwise, it will soften the sealant and make it less effective to adhere to the surface.
4. Make The Flex Seals Less Thickness
Flex seals are thicker than regular sealants. You can make this sealant slightly less thick.
Mineral spirits or acetone come in handy for this purpose. Less thickness means faster drying.
Make sure to add at most 2-3 drops. Otherwise, it will alter its chemical composition.
This will affect its sealant effectiveness and compromise durability.
5. Use Specialized Primers
Some manufacturing companies sell specialized primers for flex seals. They ensure the best possible bond and durability. Plus, the sealant will sit on the surface perfectly.
Besides, these specialized primers also can decrease the dry time as you won’t have to apply too much sealant.
The primer will create a thin layer on the holes or cracks.
So, what primer to use for flex seals? Dozens of options are available in the market. But SEM Flexible Primer is my top favorite due to its high effectiveness and compatibility.
6. Use a Dehumidifier
Does your indoor area have too much humidity? It will undoubtedly affect the dry time as too much moisture is already in the surrounding area.
This will cause a slower evaporation process. It is a common issue when there are no windows and fans. So, what is the solution?
You can use a Dehumidifier to reduce the air’s moisture. Use the device for at least 24 hours to get the best result. Also, make sure to follow the manufacturer’s instructions.
7. Use A Roller Or Brush
Do you want effective control in your application process? Paint brushes or rollers are more effective than spraying devices.
It gives you more control. You can apply the flex seal evenly. Spraying devices may sometimes cause over-application in some areas.
A roller or brush comes in handy to apply a thin sealant layer. This will reduce the dry and cure time.
FAQ’s
Can I speed up the Flex Seal curing process?
It’s not recommended. Let nature take its course.
Does Flex Seal work underwater?
Yes, but it needs to be cured first!
How long does Flex Seal usually take to cure?
It takes about 24 to 48 hours, depending on conditions.
Is Flex Seal safe for all surfaces?
Most, but always check the manufacturer’s guidelines.
What happens if Flex Seal freezes?
It can become brittle and lose its effectiveness.
Final Thoughts
If you want a long-lasting and effective seal, correctly applying the flex seal and giving enough time for drying and curing is vital.
Choose a free schedule where you don’t need to use the outdoor water source. Or use an alternative option.
Make sure to keep kids and pets away until the seal is fully cured. Now, you know what happens if flex seal gets wet before it cures.
I am Robert Sandin, a professional sealing expert with a diverse range of expertise. From concrete to various other materials, I possess in-depth knowledge and experience in the art of sealing. On my website, I offer valuable tips and expert recommendations on sealing techniques and products for different materials. Whether it’s concrete, wood, metal, or more, I am committed to providing you with the guidance you need for successful sealing projects.
