Can I put drylok over Flex Seal?

While Drylok is designed to be applied directly to masonry surfaces, applying it over Flex Seal may affect adhesion. Flex Seal creates a smooth, rubberized, waterproof barrier, which might prevent Drylok from properly bonding. If you need to use both, it’s best to apply Drylok first to the masonry surface and then use Flex Seal to reinforce any cracks or leaks. Always check adhesion on a small test area before committing to a full application.

To learn more about what Flex Seal can do for you, click here.