Definition(s)
Alcohol–resistant foam concentrate (AR)
Alcohol–resistant foam concentrate (AR) is a foam concentrate that is resistant to breakdown when applied to the surface of alcohol or other polar solvents.
Source: IMO MSC.1/Circ.1312, Revised Guidelines for the performance and testing criteria, and surveys of foam concentrates for fixed fire-extinguishing systems, 10 June 2009, International Maritime Organization. Regulatory Guidance