The glazing of units should be in strict accordance with the GGF Glazing Manual. Never use incompatible glazing compounds (e.g. containing solvent) for the solid bedding of insulating glass. The sealant/glass interface should always be adequately protected against exposure to UV radiation. Rebate height must be sufficient to accommodate adequate depth of seal, edge cover, perimeter clearance and manufacturing variations.


Before glazing, frames should be allowed to dry completely after staining, preservative treatment or painting. Solvent should not be used either to soften the glazing compound or to clean the unit.


Some types of silicone sealant when in contact with the edge seal can cause an adverse reaction in the sealant, leading to premature failure.


If it is necessary to use a silicone when glazing then we recommend the use of ‘Low modulus – Neutral cure’ product, ensuring that it does not in any way come into contact with the perimeter seal.


Please note that our hot melt sealant is not intended for structural glazing applications. It is a thermoplastic and should not be subjected to the weight of an unsupported pane. Frame design must provide proper support for the unit and prevent the glass from slipping. Stepped units are becoming an obsolete design.