Sealmaster, a division of Dixon International Group Limited, of Cambridge in the UK.

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Certifire Certificate No CF221:
FireGlaze Compound in timber door leaves for periods of 30 minutes fire resistance.

The glazing material shall be FireGlaze Compound 2mm thick between glass and the beads, full height of the beads. Hardwood or non-combustible material setting blocks shall be used to achieve the required edge cover. The glazing beads shall be of hardwood sections, 25mm wide by 15mm high, chamfered by 20^o and fixed using No 8 wood screws 50mm long or 38mm steel pins at a maximum of 150mm centres.

The apertures may be cut directly into a solid core or lined with softwood or hardwood.

This Certificate of Approval relates to apertures of the sizes and using the glasses shown in the table below, when used in conjunction with FireGlaze Compound glazing method:

Glass type	Maximum Pane dimension	Maximum Pane	Maximum Pane
	(mm) at any aspect ratio	dimension (mm) at	Area
	other than 1: 1	an aspect ratio of 1 : 1	(m2)
Pyroshield	824	741	0.55
Pvran S	824	741	0.55
Firelite	824	741	0.55
Pyrodur*	824	741	0.55
Pyrobelite*	824	741	0.55
Pyrostop"	824	741	0.55
Pyrobel*	824	741	0.55
* Reduce width of beads accordingly but beads fixed with screws only
The aspect ratio of the glass may be unlimited within these pane dimensions

For this application, the following conditions shall also apply:

The doorset, including door frame and associated building hardware, should have achieved at least 30 minutes fire resistance when tested, or subsequently assessed by one of the laboratories approved by CERTIFIRE as acceptable for this purpose, to BS 476: Part 22: 1987.

If the proposed doorset is to be used in double-leaf configuration, the test or assessment evidence should be applicable to double-leaf configurations. Likewise, if the proposed doorset is to be used in the unlatched configuration, the available evidence should be applicable to unlatched doorsets.

The proposed doorset should also have included a glazed aperture or apertures of the intended size, shape, area and number.

When used to glaze CERTIFIRE approved doorsets which have smaller apertures than allowed in this certificate, the aperture sizes specified in the doorset certificate shall take precedence.

The door leaves shall consist of timber faces coupled with timber or other cellulosic cores of minimum overall leaf thickness, 44 mm.

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