Cold Spray Endo-Frost – 200 ml Produces a rapid response. Needs no refrigeration. Spray nozzle for precise application. Neat - no dripping. Easy to use. ROEKO Endo-Frost is a cold spray applied with cotton pellets for vitality checking the pulp. The normal response of nerve fibers can be tested by stimulating the nerve endings of the pulp with the cold spray. As a result of this test, the vitality (existing blood flow) of the tooth can be verified. With a temperature of -50°C, the effective Endo-Frost spray is much colder than ice or ethyl chloride. The diagnostic spray contains no chlorofluorocarbons and is odourless.