Backing Rod

Concrete Panel Joints – Backing Rod

It is important to use backing rod when sealing joints as it is only when the joint materials are installed as specified that the joint will perform in accordance with its advertised flexibility.

Open Cell (usually orange or grey) backing rod has several advantages over Closed Cell (usually white) backing rod. For example;

•   It is more pliable and so fits into a greater range of joint widths for any given diameter
•   The open cell nature allows air through to the reverse side of the sealant which improves curing time

However, it also absorbs moisture. Therefore if there is a likelihood that the backing rod will get wet before it is installed and sealed it should not be used – use closed cell instead.
 
Backing Rod Open Cell
Standard sizes:
10mm x 210m
16mm x 150m
18mm x 120m
22mm x 100m
29mm x 60m
30mm x 60m
38mm x 30m
40mm x 30m
50mm x 20m
 
Backing Rod Closed Cell
Standard sizes:
6mm x 50m
10mm x 50m
15mm x 50
20mm x 50m
25mm x 50m
30mm x 50m
40mm x 2m 
50mm x 2m
​
Foam Joint Fillers of almost any size -
Plain or Adhesive backed
  50mm Sof-Form 10mm x 25m
  75mm Sof-Form 10mm x 25m
100mm Sof-Form 10mm x 25m
125mm Sof-Form 10mm x 25m
150mm Sof-Form 10mm x 25m
200mm Sof-Form 10mm x 25m
250mm Sof-Form 10mm x 25m
300mm Sof-Form 10mm x 25m