The extrusion is adhered to the blocks using Easifix adhesive.
It should be applied either in a zig-zag manner from side to side or as two perpendicular beads within the grooves of the profile.
Easifix adhesive is odourless and therefore ideal and for use in small enclosed areas. It will expand and contract by 50% of its own volume. Combining this with the Easifix extrusion (which is manufactured from PVC) allows the panel to expand and contract.