Your single solution for waterproofing and crack isolation. Visit tecspecialty.com to learn more. ©Copyright 2018 H.B. Fuller Construction Products Inc. TEC® , the TEC® logo, and HydraFlex™ are trademarks of H.B. Fuller Construction Products Inc. Water. Proof. Designed to protect your tile installations, HydraFlex™ has proven to be your trusted solution for 1 /4" crack isolation and waterproofing applications. Now, accelerate your installation and set tile in just 60-90 minutes with our new single coat, 1 /8" crack isolation application. HydraFlex™ is now available in a 3.5 gallon pail to complete your most common job sizes with an easy-to-carry solution. No Mesh Required for Waterproofing Install Tile in as soon as 1 hour Isolates cracks up to 1/8" or up to 1/4" based on application Introducing HydraFlex™ Rapid Installation System Isolate. Cracks.