Why is Cementitious Grout no Option for Glass Embedded Solutions
The use of cement-based grouts for external glazing of glass has been common practice; however, there are several risks incorporated with cement-based grouts which must be highlighted when installing any laminate product.
These are the following areas of concern:
Cement-based products are caustic and can react when in contact with sensitive
materials e.g. laminated interlayers.
There are many different grades of grouts available; some seriously shrink as they harden.
Cement-based grouts have a level of porosity, allowing water to penetrate, which can freeze and leave hairline cracks.
More water can penetrate. Freeze and thaw cycles destroy the cementitious
grout.
Altogether Sika does not recommend using cement-based products to instal glass balustrades. Use SikaForce® GG instead.
"Glass Embedding with cementitious grout is high risk concerning incompatibility with the interlayer and glass breakage."