THERM-A-BEAD – a high expansion phosphate based intumescent contained in a PVC sleeve designed to provide a masking effect on the beads with maximum insulation between the glass and the bead.
To be used alongside THERM-A-LINE to create THERM-A-GLAZE 60.
THERM-A-GLAZE 60 one hour glazing system has been developed to provide protection to the glazing panel in FD60 and FD60S rated timber fire doors using hardwood glazing beads. The beads do not require any treatment. Depending on the particular leaf construction and doorset arrangement employed, permitted glazed areas may be up to 0.47m2. The glass types that can be used are 6mm thick Georgian wired plate glass, Borosilicate or Ceramic glass. Door constructions incorporating Flaxboard or Particleboard cores require the glazing aperture to be lipped with a minimum of softwood for 54mm thick doors and with hardwood of minimum density 600kgm-3 for 45mm thick doors.