AS 4075-1993 pdf free.Urea-Formaldehyde Foam Thermal Insulation - Installation Requirements For In Situ Set Foam. AS 4075 sets out recommended practice for the installation of urea-formaldehyde (UF) foam, which is manufactured and dispensed on site into the cavities of suitably constructed walls, ceilings and floors for thermal insulation purposes. This Standard defines constructions to which this application is limited. 2...