After 4 weeks I recieved my order of tank sealant. Pg. 22-03 Step 4: After mixing an 11gr batch, smeared a thin film on the top surface of the top flange of the Firewall Bottom. Clecoed then riveted the Firewall Shelf to the Firewall Bottom. Cleaned up the area using MEK and paper towels. Put the clecoes in a covered coffee can and covered them with MEK to disolve the tank sealant.