Recommended Glazing Methods

Slenderpane manufacture slim doubled glazed units (Slimlite) that are thermally efficient with ultra slim sightlines, below are guidelines for glazing using Slenderpane units

All units should have a minimum tolerance all round of 1.5mm, this includes all templated work. Templates will all need to be cut and sent to us in actual glass size using hard board or MDF. Templates should have all instructions written on e.g. inside/outside of room, left or right-handed.

Guarantee with method of glazing

All putty, sealants and glazing methods will need to be as specified as without adhering to these instructions the warranty will become invalid.

Apertures must be dry before glazing. It is imperative that the glazed unit is set on glazing packers and is totally sealed with Silfix U9 sealant so that no moisture can find its way into the rebate and make contact with the seal on the unit.

Putty Glazing

A non-setting glazing compound should be applied to the back of the rebate and the unit to be equally compressed to provide an even all-round bed of approximately 2mm between timber and glass.

The unit should be seated onto suitable glazing packers to avoid glass to timber contact at the bottom of the unit and held in position by non-corrosive sprigs or brads, such as copper, sherardized, stainless steel or ideally glazing gun diamond points.

The gap around the perimeter or the unit should then be sealed with Silfix U9 silicone and allowed to dry for 24 hours this is essential. The unit can then be face puttied with a non-linseed oil putty in the usual way.

Glazing with beads

Back rebate with a non-setting glazing compound such as Arbo or Silfix U9 silicone, seat unit on to glazing packers and seal the perimeter with a Silfix U9 silicone then place bead in and pin into place, (you do not have to wait for silicone to cure, its better to put bead into wet silicone). The pins should be non-corrosive panel pins. If desired, you may cap the bead with silicone.

If glazing with security tape, use glazing packers at the bottom of unit, you will then need to seal around the perimeter of the unit with a Silfix U9 silicone and install beads while silicone is still wet.


Puttied or beaded methods require overpainting so that the paint makes a good seal on the glass and the putty or bead, this is to stop any water egress. Painting can be carried out around 14-28 days after putty is applied, or please see label on putties used.


We recommend glazing to be carried out by an experienced glazier.
We do not tape our units as recommended by Bostik butyl hot melt data sheet.