Note: This rating only applies when the vinyl is applied to substrates of a density greater than or the same as plasterboard, which is 800kg/m3, since the substrate to which a self-adhesive product is applied to will affect its fire performance. This includes steel, aluminium, glass. The above classification is defined as suitable for construction applications, excluding flooring and linear pipe thermal insulation.

There is no official correlation between Class B and other standards such as BS 476. A product that meets Class B may also meet BS Class 0 and vice versa but one is not directly equivalent to the other.