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Expansion joint Backing Rod:


           


Wrimco Backer Rod is an ideal non-absorbent compressible backup material. It is inserted into a joint to control sealant depth to create a backstop to: Allow proper sealant tooling. Allow proper sealant wetting of the joint surfaces. And yield a proper bond breaker between the Backer Rod and sealant. It can also be used as a temporary seal. 

Compatibility: Wrimco Backer Rod is compatible with butyl, polysulfide, acrylic polyurethane, silicone and most other cold applied sealant compositions. 

Specific Uses: Commonly used in glazing installations, window and door applications, expansion joints, curtain wall joints, partitions, log construction, pavement joints, repairs, precast units and copings. 

Composition and Materials: Wrimco Backer Rod is an extruded round, closed cell, low density polyethylene foam material with a skin-like outer texture. It is highly flexible and compressible for easy installation. Available in a range of diameters. 

It is chemically inert and will resist oil, gasoline and most other solvents. This material will not stain nor adhere to sealant materials and is non-exuding. 

Installation

Joint or opening must be clean, dry and free of obstructions. Select proper rod diameter and cut to length or use directly from spool. With a blunt instrument or roller, uniformly install rod at the level recommended by the sealant manufacturer, specifier or architect involved. Generally, the depth of the joint after the backer rod is installed is one half the width. Very large and very small joints vary in terms of this depth to width ratio. Do not puncture, stretch or overly compress. 

Diameter

Meters per reel

Shipping format

Joint width

1/4 " (6mm)

609 metre

Reel

4-5mm

3/8 " (10mm)

320 metre

Reel

6-8mm

1/2 " (13mm)

380 metre

Reel

9-11mm

5/8 " (15mm)

235 metre

Reel

12-13mm

3/4" (19mm)

165 metre

Reel

14-17mm

1 " (25mm)

9 metre

Reel

21-23mm

30mm

60 metre

Reel

26-28mm

2" (50mm)

35 metre

Reel

>47mm

   

Property

Value

Test method

Density

2.0 lbs/cu. ft.

ASTM-D-1622

Tensile Strength

50 PSI

ASTM-D-1623

Compression Deflection

5 PSI@25%

ASTM-D-1621

Water Absorption

0.03 gm/cc

ASTM-C-1016

Water Absorption

0.02% by volume

ASTM-C-509

Temperature Range

-32 to 99 oC

 

 

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