Frank Wall WFB30 Wall Board and Foam Bonder The 30lb adhesive spray canister will spray a complete pool in 3-5 minutes. Simply place canister in middle of pool with 25’ hose and spray all of the pool. There is a 30 minute work time to apply wall board or foam. the canister will spray 20-30 pools with minimum application and 6-10 pools with full coverage.