Name: Green Rod
BACKER ROD
Round, flexible, continuous lengths of extruded,
closed-cell polyethylene foam backer rod for use as
a backing material for elastomeric and other cold
Transforming Foam into Innovation
applied sealants.
FEATURES Physical Property Requirements
鈥? Meets all of the requirements of the 1990 Clean Air Act
鈥? Is a 鈥淒omestic End Product鈥? 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
鈥? Easy to apply
鈥? Chemically inert Density lb/ft3 (kg/m3), max 1.3-2.3 (20-37) D 1622
鈥? Waterproof
Outgassing (No. of bubbles) <1 C 1253
Compression recovery, %, min > 90 D 5249
DESCRIPTION
TYPE: C 鈥? Per ASTM C 1330. - Cylindrical, flexible sealant backings 25% Compression deflection force, 15 (1.05) D 5249
psi (kg/cm2), max
composed predominantly of closed cell material, for use with
cold applied sealants. Tensile Strength psi (kg/cm2), min 24 (1.69) D 1623
FORM: Round Foam Rod
TEMPERATURE LIMITS: -45掳F to 160掳F TABLE 1
Product Packaging Information and
Green Rod
APPLICATIONS Recommended Diameter Use for Joint Width
Commonly used in new Expansion/Contraction Joints where cold
Nominal Joint Linear Ft./ #/
applied sealants are used, such as curtain walls, construction Carton
Diameter Dimension Carton Carton
partitions, precast assemblies and copings, parking decks, bridge Dimension
in. - mm in. - mm lft. - m lbs. - kg
construction, building rehabilitation, etc.
1/4鈥? 6 6400 1951 18鈥漻18鈥漻31鈥?
3/16鈥? or less 5 or less 12 5.4
3/8鈥? 10 1/4鈥? 6 3600 1097 18鈥漻18鈥漻31鈥? 12 5.4
SIZE SELECTION (Table 1)
1/2鈥? 13 3/8鈥? 10 2500 762 18鈥漻18鈥漻31鈥? 12 5.4
Proper size selection is important, as it controls the depth of the
5/8鈥? 16 1/2鈥? 13 1550 472 18鈥漻18鈥漻31鈥? 12 5.4
sealant bead. It must be oversized to fit tightly into the joint, and
3/4鈥? 19 5/8鈥? 16 1100 335 18鈥漻18鈥漻31鈥? 12 5.4
function as a bondbreaker to prevent back-side adhesion of the
7/8鈥? 22 11/16鈥? 18 850 259 18鈥漻18鈥漻31鈥? 12 5.4
sealant.
1鈥? 25 3/4鈥? 19 550 168 18鈥漻18鈥漻31鈥? 12 5.4
1 1/4鈥? 32 7/8鈥? 22 400 122 18鈥漻18鈥漻31鈥? 12 5.4
BENEFITS
1 1/2鈥? 38 1 1/8鈥? 29 552 168 12鈥漻22鈥漻74鈥? 18 8
Limits sealant depth, and prevents excessive sealant use. Helps
2鈥? 51 1 5/8鈥? 41 360 110 12鈥漻22鈥漻74鈥? 18 8
sealant assume optimum shape, prolonging sealant service life.
2 1/2鈥? 64 2鈥? 51 240 73 12鈥漻22鈥漻74鈥? 18 8
Will not absorb water or wick water to the joint walls to cause
3鈥? 76 2 1/2鈥? 64 144 44 12鈥漻22鈥漻74鈥? 18 8
adhesive failure. Prevents back-side adhesion of the sealant.
4鈥? 102 3鈥? 76 90 27 12鈥漻22鈥漻74鈥? 18 8
6鈥? 153 4 1/2鈥? 114 72 22 12鈥漻25鈥漻113鈥? 35 16
JOINT PREPARATION (Pavements)
New joints must be cleaned thoroughly, removing any concrete form-
release agents, curing compound residue, laitance, or any foreign materials. Freshly sawed joints should be washed with water immediately
afterward to remove any loose material from the joint faces. Wire brushing, sandblasting, high-pressure water, or any combination of techniques
should be used to remove contaminants remaining on the joint face. To ensure a good sealant bond, joints must be clean and dry when the new
sealant is installed. In repairing old joints, all old sealant or filler must be removed. This can be done by cutting or blowing out the old material or
using any other procedure found to be effective.
INSTALLATION & SEALANT PLACEMENT (Buildings)
Just prior to placing the backer rod, clean all joints per the sealant manufacturer鈥檚 recommendations. 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 with a blunt
tool or roller. Refer to sealant manufacturer鈥檚 recommendations.
PRECAUTIONS
Do not puncture, over compress or stretch Green rod庐 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 鈥? 501 NMC Drive, Zebulon, North Carolina 27597 鈥hone: 919.269.6500 or 800.345.7279 鈥? Fax: 919.269.7936 鈥? www.nomaco.com
December 2007
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