Thinking About Using Flex Glue? Here’s What You Need to Know

This blog was written by a member of the Flex Seal Editorial Team. All photos were taken by Flex Seal Studios.

When it comes to reliable adhesives, Flex Glue is a name that often comes up in DIY and professional circles. Whether you're fixing a broken chair or working on a major home improvement project, Flex Glue provides a strong, waterproof bond that can adhere to a variety of materials.

If you're considering using Flex Glue, you likely have some questions. In this post, we’ll answer five frequently asked questions about this powerful adhesive to help you get the best results for your project.

1. Does Flex Glue Really Work?

The short answer? Absolutely. Flex Glue is trusted by DIYers, contractors, and professionals alike because it works. It's waterproof and weatherproof and can be applied to a variety of surfaces—even underwater! Whether you're making emergency repairs or tackling a long-term project, Flex Glue provides a secure, lasting bond you can count on.

2. How Strong is Flex Glue?

Flex Glue is incredibly powerful, with instant grab technology that locks into place and holds on tight. Independent tests show that Flex Glue can support hundreds of kilograms under the right conditions. From securing a broken piece of furniture to attaching heavy materials, Flex Glue delivers unmatched strength and durability.

3. Is Flex Glue the Same as Silicone?

Flex Glue is not the same as a silicone sealant. While both are used for bonding and sealing, Flex Glue is a high-strength, rubberized adhesive designed to bond to almost any material, including wood, metal, tile, plastic, and more. It provides a super-strong hold that remains flexible even after curing. Plus, Flex Glue can be painted over, a benefit most silicone-based sealants don’t allow for.

4. How Long Does Flex Glue Take to Dry?

One of the biggest concerns when using an adhesive is drying time. Flex Glue begins to form a skin within about 10 minutes of application and will be dry to the touch in 1 hour. It fully cures within 12 to 24 hours and reaches maximum strength in 7 days. Keep in mind that exact drying times can vary depending on temperature, humidity, and the materials being bonded.

Flexpert Tip: For best results, apply firm pressure to ensure proper adhesion.

5. How Long Will Flex Glue Last?

Flex Glue is built to withstand the elements. Once fully cured, it creates a long-lasting, weatherproof seal that can endure extreme temperatures, UV exposure, and moisture. Repairs made with Flex Glue can last for years without shrinking, cracking, or peeling. Whether used indoors or outdoors, this powerful adhesive is designed to hold strong over the long haul.

Flex Glue has earned its reputation as a reliable, high-strength adhesive for a reason. Its waterproof, durable, and versatile formula ensures a secure bond that lasts. Now that you have answers to some of our most common questions, you’re ready to grab some Flex Glue and repair with confidence!