MSDS PAGE: CAS N/A MSDS nomaco_com---HBR-Hwy-BackerRod.asp

Name: HBR®
HIGHWAY SEALANT
BACKER ROD
HBR® is a closed-cell, polyethylene foam backer rod
that is placed into the joint reservoir of expansion
Transforming Foam into Innovation
or contraction joints of old or new portland cement,
concrete, or asphalt pavement joints.

FEATURES Physical Property Requirements
�? Meets all of the requirements of the 1990 Clean Air Act
�? Is a “Domestic End Product�? as defined in the Buy American Property Value ASTM Test Methods
Act, Title 41 USC 10 Water absorption (g/cc) <.03 C 1016—Procedure B
�? Easy to apply
Density lb/ft3 (kg/m3), max 1.3-2.3 (20-37) D 1622
�? Chemically inert
�? Waterproof Outgassing (No. of bubbles) <1 C 1253
�? Will retain its flex or compressibility
Compression recovery, %, min >90 D 5249
25% Compression deflection force,
DESCRIPTION 15 (1.05) D 5249
psi (kg/cm2), max
TYPE: 3 - Round rods of various diameters for use with cold-
applied joint sealants per ASTM D 5249 Tensile Strength psi (kg/cm2), min 24 (1.69) D 1623
FORM: Round Foam Rod
TEMPERATURE LIMITS: -45oF to 160oF
TABLE 1
APPLICATIONS Product Packaging Information and
HBR®
Expansion/Contraction Joints where cold applied sealants are Recommended Diameter Use for Joint Width
used. HBR is the preferred choice for use with gun grade highway
Nominal Joint Linear Ft./ #/
sealant in jointed PCC concrete pavements. Other typical Carton
Diameter Dimension Carton Carton
horizontal joint sealing applications are bridge decks, parking Dimension
in. - mm in. - mm lft. - m lbs. - kg
decks, airport runways and other flatwork applications.
1/4�? 6 6400 1951 18”x18”x31�?
3/16�? or less 5 or less 12 5.4
3/8�? 10 1/4�? 6 3600 1097 18”x18”x31�? 12 5.4
BENEFITS
1/2�? 13 3/8�? 10 2500 762 18”x18”x31�? 12 5.4
Limits depth of the sealant, and prevents excessive sealant use.
5/8�? 16 1/2�? 13 1550 472 18”x18”x31�? 12 5.4
Helps sealant assume the optimum shape to prolong sealant
3/4�? 19 5/8�? 16 1100 335 18”x18”x31�? 12 5.4
service life. Will not absorb water or wick water to the joint
7/8�? 22 11/16�? 18 850 259 18”x18”x31�? 12 5.4
walls to cause adhesive failure. HBR acts as a bond breaker thus
1�? 25 3/4�? 19 550 168 18”x18”x31�? 12 5.4
preventing bottom side adhesion of the sealant to the joint
1 1/4�? 32 7/8�? 22 400 122 18”x18”x31�? 12 5.4
reservoir.
1 1/2�? 38 1 1/8�? 29 552 168 12”x22”x74�? 18 8
SIZE SELECTION (Table 1) 2�? 51 1 5/8�? 41 360 110 12”x22”x74�? 18 8
Proper profile selection is important to control the shape of the 2 1/2�? 64 2�? 51 240 73 12”x22”x74�? 18 8
sealant bead. It must be oversized to suit the application . 3�? 76 2 1/2�? 64 144 44 12”x22”x74�? 18 8
4�? 102 3�? 76 90 27 12”x22”x74�? 18 8

JOINT PREPARATION
Pavement joints should be dry, clean of all scale, dirt, dust, curing compound, and other foreign matter. The sidewalls of the joint space to be sealed should
then be thoroughly sandblasted, blown clean of loose sand by high-pressure air, and sealed. If joints are cleaned by jet waterblasting, the jet waterblast
machine shall be capable of discharging water up to 10,000 psi (69 MPa) pressure and 22 gal. of water/min. Joints shall be
thoroughly dry before sealing.
INSTALLATION
Just prior to placing the backer rod, clean all joints with high-pressure compressed air. Air compressors used for this purpose must be equipped with traps
for removal of oil and moisture. Install the backer rod at the depth recommended by the sealant manufacturer. The backer rod can be installed by hand, but
an easily constructed roller device will simplify and expedite installation. It will also ensure a consistent, uniformly placed backer rod at the proper depth.

The sealant bead must be applied at least 1/4�? below the pavement surface (refer to sealant manufacturer’s recommendations).
PRECAUTIONS
Do not puncture, over compress or stretch HBR® during insertion. Do not use with hot applied sealants. Tests for outgassing of cold applied sealants
shall be made in accordance with ASTM Test Method C 1253. Sealant compatibility should be confirmed by the sealant manufacturer. Compatibility
characteristics of sealants in contact with sealant backings can be determined by ASTM Test Method C 1087.

Although every effort has been made to assure the accuracy of this information and the safety and suitability of its products, Nomaco Inc. accepts no responsibility for results obtained by
the application of this information or for the safety and suitability of its products, either alone or in combination with other products. Users are advised to make their own tests to determine
the safety and suitability of each such product or product or product combination for their own purposes. In view of the various conditions under which this information and our products or
the products of other manufacturers in combination with our products may be used, Nomaco sells its products without warranty, and buyers and users assume all responsibility and liability
for loss or damage from handling and use of these products, whether used alone or in combination with other products.

Nomaco Inc �? 501 NMC Drive, Zebulon, North Carolina 27597 •Phone: 919.269.6500 or 800.345.7279 �? Fax: 919.269.7936 �? www.nomaco.com

December 2007

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