In the Betektect thermal insulation system, these are used to attach Betektect thermal insulation panels to roofs and protect the system against wind erosion.
The BETEKTECT standard nail (or plastic nail) is used on concrete, solid brickwork, perforated brickwork, gas concrete, and solid and perforated lightweight concrete blocks.
On gas concrete roofs, the concrete gas dowel is recommended, and on brick roofs, the brick dowel is used.