HYDRO-BLOK Joint Sealant has been developed as the optimal sealant/adhesive for use with HYDRO-BLOK shower system components. The low VOC polyurethane formula provides a strong, flexible & watertight seal. Also available in 20oz Sausage. HYDRO-BLOK Joint Sealant features a 20-year performance warranty. Refer to the product label and MSDS for additional health and safety information. Not classified as hazardous. 12-month storage/shelf life at a temperature of 41 to 77 degrees fahrenheit in the original sealed cartridge. Available in 10oz cartridges and 20oz sausages.