ROBERTS 7250 is a professional-grade adhesive for cork underlayment with a strong initial grab and good tack. It is formulated to adhere unfinished cork underlayment to concrete and APA-rated plywood above, on, or below grade. Powered by Microban, this antimicrobial product protection helps fight the growth of stain and odor-causing bacteria that can cause product degradation. This adhesive covers up to 190 sq. ft. per gallon depending on trowel type, substrate and installation conditions. It offers an open time of up to 60 minutes, a working time of up to 90 minutes, and a 24-hour cure time. It offers a 2-year shelf life from date of production when stored in original unopened container, and a 10-year limited adhesive bond warranty. This is an environmentally friendly formulation with a low VOC: less than 1 g/L. Made in the USA.