Foam Sealer Oil

A Sealer Oil must be added to the surface of all National Foam foam concentrates, except the Vaporshield and High Expansion types, immediately after the concentrate is placed in a storage tank. Sealer Oil serves as a sealing barrier between the foam concentrate and air and reduces the effects of evaportation and concentrate deterioration. A depth of approximately ¼” (6.35 mm) is required to provide an adequate seal. This procedure is not recommended for apparatus concentrate tanks or tanks subjected to excessive vibration.

Sealer Oil is a technical or U.S.P. grade white mineral oil having a viscosity between 200 to 500 SSU (44-110 centistokes) at 100°F (38°C).

  • NFPA June, 17-20 2019

    National Foam will be exhibiting at the NFPA in San Antonio in June, 17-20. Visit us on booth # ...

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    National Foam are exhibiting at ILTA in Houston, June 3-5 2019. Come and see us on booth # 982. ...

  • Next Engineering Seminar June 4 – 6, 2019

    The next Foam Fire Protection Engineering Seminar is on June 4-6, 2019. Please register here. As a participant, you will be among ...