Sealants

In respect to sealants – closed cell backing rods should be used – this requires the correct selection of rod given limitation of compressibility of the rod itself (talk to the quality team if subcontractors raise concerns with this including claims of ‘outgasing’ etc

Above: Closed cell back rod

Above: Open cell backing rod

Above: Incorrect use of open cell but indicative of cross section of sealant joint

It is essential that sealant joints are constructed to the correct cross section - refer to above detail.
Regardless of sealant manufacturers claims - primer must be used on all sealants.