How to Use Flex Seal Spray – Official Guide
//How to Use Flex Seal

How to Use Flex Seal

Put the phone down. Aren’t you tired of calling your repairman for every leak or break around the house? That gets expensive.

Unless you don’t mind wasting thousands of dollars, there’s another way you can fix those pesky leaks without breaking the bank.

Flex Seal can be used on almost every surface: wood, metal, tile, concrete, masonry, fabric, glass, plastic, aluminum, porcelain, drywall, rubber, cement, and vinyl.

Just use Flex Seal, a liquid rubber sealant coating that’s perfect for almost any DIY project inside or outside your house. It won’t sag or drip in the summer heat. And it won’t crack or peel in the winter cold. It even prevents corrosion.

There are many practical and creative ways to use Flex Seal. But what counts most is that you use it properly. 

Make sure to have all of the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.

Required Flex Materials:
-Flex Seal
-Drop Cloth
-Painter’s Tape

Step 1: Prepare Your Project Area
Before using Flex Seal, make sure that you have a well-ventilated area. Your garage could be the perfect space (with the door open). Or you could use a room in your house with windows opened and a fan running. If you’re more of an outdoor kind of guy (or gal), try your backyard. But make sure you pick a dry weekend to do your project. That means no rain, sleet, snow, dew – you get the picture.

Once you’ve picked your area, cover it with a drop cloth. If you are spraying an entire object this will prevent you from spraying Flex Seal on any unwanted areas.

Step 2: Prepping a Clean Surface
Wipe off any dirt or dust from your surface. If the dirt is a little hard to get off, wipe the surface down with a damp rag and cleaning solution.

Flex Tip: If there’s any rust on your surface, sand it off before moving ahead. Sanding your surface will increase adhesion for Flex Seal.

Once your surface is clean, wipe it dry. Flex Seal works on wet areas, but it’s more effective on dry surfaces. Depending on your project type, you may need painter’s tape to section off the areas you’re looking to treat.

For example, if you’re fixing leaks in a gutter outside, you’d tape off the edges around the gutter before you start spraying the holes with Flex Seal.

Step 3: Spray It
Shake your can of Flex Seal vigorously for about a minute. Then aim the nozzle at your surface and spray it in a sweeping motion from a distance of 8 to 12 inches. Take your time to focus on those holes and the larger surrounding area around them. Feather the edges.

Let the first coat dry for 24 hours before applying the next coat. Allow 48 hours to fully cure.

Flex Tip: Apply several even coats so ALL cracks and holes are filled. If you aren’t sure if you have enough coats, run a test. But only run the test after your last coat has dried for 48 hours. For example, if your project is to seal a flower pot, put water in the pot. If water is seeping through cracks and holes, you need more coats. Just dry the area, and spray it with another coat.

Where have you used Flex Seal?
We’d love to hear about how well this DIY guide worked for you. Just leave a comment on any of our social media pages. Follow us on Facebook, Twitter, Pinterest, Instagram, and Youtube. If you have a video of you applying Flex Seal, tag us.

By: Nick Wade

P.S. Flex Seal comes in 12 different colors: black, clear, white, brite, brown, almond, gray, green, blue, red, terra-cotta, and yellow. You can find it at your nearby retailer or just click here to grab your favorite colors.