When using Flex Seal Spray, the thickness of each coat impacts how quickly the product cures. While it may be tempting to apply a single, thick layer to cover a crack or gap, thicker applications take significantly longer to dry and cure, which can impact performance.

Why Thickness Matters

Flex Seal Spray is designed to be applied in multiple light coats. Spraying it too thickly in one pass can lead to uneven curing, soft spots, or extended drying time. Thin coats allow the product to dry quickly and evenly, helping you build a durable, flexible barrier with better long-term adhesion.

Best Practices for Application

• Apply in layers: Two to four thin coats are recommended for most projects.
• Dry between coats: Allow each coat to dry at least 24 hours before applying the next.
• Don't overdo it: A thick layer may seem efficient, but it can slow drying and reduce performance.
• Use the right technique: Hold the can 8–12 inches from the surface and use even, sweeping motions.

Still have questions? Check out our Flex Seal FAQs for answers!