Product Data Sheet Show all documents

Sika® Backer Rod

¾" Closed Cell Backer Rod

Sika® Backer Rod is used to partially fill fill expansion joints and cracks before the application of sealant. Its helps to prevent 3-sided adhesion while allowing you to control the depth of the sealant. 

  • Prevents 3-sides adhesive
  • Highly flexible & compressible
  • Good temperature resistance
  • Won't absord water
  • Controls sealant depth in joint or crack
  • Resists oil & gasoline
Product Data Sheet Show all documents

Usage

  • Partial filling of deep expansion joints
  • Partial filling of cracks
  • Typical applications:
    • Glazing installations
    • Window & door perimeters
    • Copings
    • Pavement joints
 

Advantages

  • Prevents 3-sides adhesive
  • Highly flexible & compressible
  • Good temperature resistance
  • Won't absord water
  • Controls sealant depth in joint or crack
  • Resists oil & gasoline

Packaging

¾" diameter by 20ft per bag. 

Color

Light gray

Product Details

Product Information

Chemical Base

Closed cell polyethylene foam

Shelf Life

N/A

Storage Conditions

Store in a cool, dry, and well ventilated location. 

Density

2.0 lbs/ ft3

ASTM D1622
Technical Information

Tensile Strength

50 psi

ASTM D1623

Service Temperature

-90°F to 210°F

Water Absorption

0.03 gm/cc

ASTM C1016

Application

Application steps

EQUIPMENT

  • Safety glases & gloves
  • Bag of Sika® Backer Rod
  • Blunt tool or roller
  • Utility knife
  • Wire Brush

APPLICATION

  1. Wearing protective gloves and safety goggles, clean joints with wire brush, removing all dirt, grass, debris and old filler material.
  2. Carefully push backer rod into the joint with a blunt tool & cut to desired length. If necessary, use the blunt tool or roller to secure backer rod in the joint.
  3. Joint width to depth ratio should be 2 to 1 with a minimum depth of ¼” or a maximum depth of ½”.
  4. For best results, diameter of the backer rod should be 1/8” larger than the width of the joint.
 

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