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Repair Crack Joints Closed cell backer rod:   


 

  

Wrimco  Polyethylene foam Backing Rod  is highly resistant to weathering, ultra-violet rays, most common chemicals and oxidation. It is non-toxic and odourless. It meets the requirements of Australian Standard AS2170, "Plastic Materials for Food Contact Use".  The closed cells give backer rod its excellent dimensional stability enabling it to withstand many years of compression and expansion and also gives the product its superior water proofing properties.   

To obtain a good seal, the backer rod should be compressed 30% when in position. Therefore specify a diameter of rod 30% larger than the width of the opening to be sealed. 

physical properties: 

Weather Resistance: Wrimco backer rod was subjected to 400 hours of UV irradiation in a Weatherometer, which is equivalent to two years exposure to sunlight. See table below for results.

No moisture absorption. No adhesion to sealants

Chemical resistance:  White backer rod is unaffected by domestic effluent or by most common industrial chemicals, e.g. hydrochloric acid, ammonium hydroxide, urea, kerosene, methylated spirits for example.  

Heat ageing: Shrinkage after 24 hours at 70 oC, less than 1%. Shrinkage after 24 hours at 90 oC, approx. 1%

Typical Applications: 

  • Building: Vertical and horizontal joint filler in concrete and between precast concrete panels, interior walls, sealing skylights, shop fronts and curtain wall construction. 
  • Industrial: Swimming pools, draught proofing, dust sealing, electrical sealing control boxes, truck and trailer construction. 
  • Furniture: Piping around chairs.  

Size: Diameter Length 

Roll Length 

Joint Width

6 mm

250 m Roll

4-5mm

10mm

250m Roll

6-8mm

13mm

50m Roll

9-11mm

15mm

50m Roll

12-13mm

20mm

50m Roll

14-17mm

25mm

50m Roll

18-20mm

30mm

50m Roll

21-27mm

40mm

2m each

28-35mm

50mm

2m each

>35mm

 

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