Add to cart AquaFlex® 5400 Crack Repair $95.00 AquaFlex® Pool Crack Repair – Pool Repair Product 24 oz. (1:1 mix ratio) Container Kit. A thick viscous trowel applied chemical resistant epoxy novolac poly sulfide designed to be applied as a flexible base coat for concrete or steel surfaces and provides 40% elongation. Crack bridging capabilities recommend applying Biaxial Fiberglass over all crack repairs. Install on clean dry surfaces, and can be sanded in 4-6 hours.