IKO Glass Fibre Underlay 3B is intended for use as an underlay or intermediate layer within a bituminous built-up roofing system.
This product is also used as an underlay to bitumen shingles in boarded pitched roofing applications.
IKO Glass Fibre Underlay 3B is manufactured with a glass fibre base and coated on either side with APP modified bitumen.
Both the upper and lower surfaces are sanded to facilitate adhesion by means of hot bitumen or cold bitumen adhesive.
