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Xtratherm phenolic foam is a phenol based insulation foam for use in solid insulation products. It is not sold as a foam alone, but is faced with a range of facers to create insulation boards, to be sold under the product range name of Safe-R. The Safe-R range covers insulation products for use in a wide range of building applications including walling, cavity walls, roofing, framing, and solid and suspended flooring. The Xtratherm phenolic insulation boards are made in a range of foam thicknesses (40 -160mm) and using various combinations of two types of facer.