Use and Care Manual
FLEX SEAL LIQUID FAQs
Q: How much will one can of it cover?
A: Coverage will vary depending on number of coats used and what type of surface you are applying
Flex Seal Liquid to. However, our available sizes typically cover the following area:
1 Large 16oz – up to 20 Sq. Ft.,
1 Jumbo 32oz – up to 40 Sq. Ft.,
1 Giant Gallon – up to 150 Sq. Ft.
Q: What is the shelf life of FLEX SEAL LIQUID?
A: Flex Seal Liquid has a shelf life of 24 months when properly stored. If the can remains open for an
extended period of time a skin may form on the surface. In order to avoid skinning over, remove lid,
use immediately and always replace the lid after each use. If skinning does occur, remove the top
layer and use product.
Q: Is it safe to use around plants and animals?
A: Yes, Flex Seal Liquid is safe around plants and animals (once fully cured).
Q: Will it expand and contract in the summer and winter?
A: Yes, Flex Seal Liquid stretches, stays flexible, expands and contracts.
Q: Can I use it on the inside of my rainwater barrel?
A: Yes, Flex Seal Liquid is safe on rain barrels (once fully cured).
Q: How much pressure will it withstand?
A: The maximum pressure Flex Seal Liquid can withstand will vary based on the surface and the
conditions under which it is applied. It’s always best to test a small area first.
Q: What temperatures will it withstand?
A: Flex Seal Liquid has a wide temperature range from -80 to 350 degrees Fahrenheit. For best
results, we recommend applying it to surfaces and substrates in temperatures between 32 and 120
degrees Fahrenheit.
Q: Can I dilute it?
A: Flex Seal Liquid is ready to use and should be used right out of the can. Do not dilute it with
solvents or water.
Q: How do I clean it up?
A: You can clean up excess or spilled product with a dry cloth or paper towel and mineral spirits
(BEFORE the liquid begins to cure). DO NOT USE water or alcohol based solvents.
Q: Can I apply it on a wet surface or when it’s raining?
A: It’s always best to apply Flex Seal Liquid on a clean, dry surface free of grease and oil. If applied
during a heavy rain, some of the product may wash away. Therefore, we recommend applying it 24
hours prior to any heavy rain, hail or snowfall (if possible).