Phenol formaldehyde resin was used as an adhesion promoter additive to two bonding system: resorcinol and m-phenylenediamine. These two systems were used to produce butyl rubber-polyester proofed fabric. The addition of resin led to better adhesion properties. The coated fabrics were exposed to heat aging and ionizing radiation: The permeability, dielectric properties, and the electrical resistivity of the coated fabrics were examined.