Sealing Solution is shipped in a one-gallon container that will contain only four ounces of concentrate. Upon receipt, fill the bottle with water to yield a full gallon of High Performance Sealing Solution. This non-OEM product is a compatible replacement for OEM sealing solution from all postage meter brands. Our powerful sealing solution concentrate arrives in a one gallon jug. Just dilute with water to instantly make 1 gallon of solution. This sealing solution is for use in all postage meters.