Foam Grade A1

Guardian 4 Foam Grade A1, which is the basis of the product range is an open celled acoustic/thermal/fire impregnated polyurethane foam. Originally developed as a safety critical foam.

Duct Wrap Roll And Liners

Guardian duct wrap roll and liners are designed to give acoustic and thermal protection to ductwork and large vessels with a class O fire performance.


GIS faced slab range is manufactured using with a rock or glass slab core with a range of suitable fire, acoustic and external facings applied to one or two sides or by encapsulating the whole slab.


Guardian 4 Fire acrylic is a halogen free, polymer emulsion based sealant that swells when subjected to temperatures in excess of 125°C and forms a char coat that restricts the passage of smoke and fire.


GIS-PBQ is a range of a three or four part laminate. The acoustic barriers core product is made from a lead free polymeric.

Sound Damping Membrane

G4A-SDM is a high density membrane manufactured from bitumen modified core with a self-adhesive backing used as an anti-resonant material, being a lead substitute.

Ultimate Barrier Slab

GIS-USB is designed and tested to prevent the spread of fire and smoke in a cavity void in both the vertical and horizontal plains, is tested up to 4 hours as well as offering high acoustic reductions.