Urea Formaldehyde Foam Insulation (UFFI) is a type of insulation that was widely used in the 1970’s for insulating and retrofitting industrial, commercial and older residential buildings. UFFI is a low-density foam that has the appearance and consistency of shaving cream, and becomes stiff and self supporting when it dries or cures (hardens).
The insulation is typically made on-site where the urea formaldehyde-based resin is mixed with a catalyst and water and foamed in place in walls or used for block fill. The foam can be forced through small openings and delivered to the entire area of any cavity before it cures.
UFFI has been prohibited from advertising, sale or importation into Canada under item 34, Part I of Schedule I to the Hazardous Products Act since December 1980. The prohibition includes all urea formaldehyde-based thermal insulation, foamed in place, used to insulate buildings. This includes melamine urea and other urea formaldehyde resins.