The hidden frame glass curtain wall is a system that adhesives the glass panel to the aluminum transom frame & sub-frame directly with silicone structural sealant. And in most cases, no need to use an extra metal connector to press & fixing the glass panel to the sub-frame & transom frame from the exterior side, so there's no horizontal frame that can be seen when viewing from outside of the building. Making the structural glass assembly components is one of the key processes for the hidden frame glass curtain wall, which is finished in the professional workshop, to make sure the quality of glue injection and processing accuracy. More's more, shortening the installation time is another huge advantage for hidden frame glass curtain walls. The installation process flow is clear and easy to understand for job site workers, as the columns, beams, and glass panels installing piece by piece. A small deviation can be adjusted easily, to match a perfect original design.