Phenolic Foam

Product description

Phenol-formaldehyde, or phenolic foam, is still available as an insu­lation product but is not as common because of its corrosive cata­lysts. It uses air as a blowing agent and has very good fire-resistance properties. It does exhibit some shrinkage over time, which degrades its thermal performance. Phenolic foams still have a high strength-to-weight ratio and are less flammable than most other plastic foams. Typically used in board product form, the major disadvantage of phenolic foam is its shrinkage. Tripolymer foam is a non-CFC, non-HCFC cavity-fill insulation that is essentially a phenolic foam. It is discussed in the next section of this chapter.6