Backer Rod
Products
Our
Backer Rod is available in all types and sizes. We also provide related
sealants. We carry Soft Cell,
Closed Cell,
Open Cell and
Hot-Rod Hot-Pour
backer rod. Our backer rods are
designed to work with popular sealants including
NP1
polyurethane,
Novalink Polyether, M1,
Duralink, glazing
sealants and self
leveling sealants like
Novalink
SL or
SL1 & SL2, as well as
butyls, polyurethane, silicones, tri-polymers, polysulfide, acrylic, etc.
The "Hot-Rod XL" Hot-Pour and "Open" celled backer rods are used with hot applied products.
Expanding foam sealant tape for sealing and metal roof closure is also
available.
All Backer
Rod
is
an easy to compress rope-like celled foam. It is inserted into a clean joint at
the required depth before caulking/sealing. Backer Rod creates an even depth and
supports the sealant / caulk allowing it to form the proper shape (about 2x
as wide as deep). It is especially important to use it with
Self Leveling Expansion Joint Sealants. Soft Backer Rod is
also used for filling gaps and for
sealing in
general construction.
Instructions for placing and applying Backer Rod.
Size Selection: Select a backer-rod diameter that is about
30% larger than the nominal width of the joint
(but not less than 10% of the largest gap).
Material: Closed Cell Backer Rod is the least expensive. It can be
used for either vertical or horizontal joints, and on-grade (ground).
Soft Cell is more adaptable to irregular joint widths (it will easily
compress up to 70%) and commonly
used in vertical tilt-wall construction. Soft Cell is not used on-grade.
Hot-Rod is used on-grade and is compatible with hot-pour and
chemical sealants. Open Cell is compatible with hot-pour
and is resistant to gas, oil and most solvents, but is
more expensive. It reduces bubbles and out-gassing. It can also
enables quicker cures in some joint designs.
Questions? Email
Sales@bestmaterials.com
Or call
1-800-474-7570 / 602-272-8128
You'll get a
prompt response !
Backer Rod
Pricing & Ordering:
Click links below
to get cost, detailed information and to order products. Freight can be
estimated by adding items to cart and pressing ESTIMATE SHIPPING button.
We have special freight for large orders and multiple boxes. Email us for a quote.
Backer Rod Shipping Notes.
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BACKER ROD PRODUCTS & PRICING:
Backer Rod By-The-Foot (all types).
CLOSED CELL Backed Rod: Lowest
cost. For ground or vertical. Color may be
medium charcoal OR gray, and is
not selectable.
Product Data Sheet
Joint Width
CLOSED CELL Backer
Rod Size (all)
1/16 - 3/16"
1/4"
<-- click link for pricing &
specs
3/16 - 1/4"
3/8"
1/4 - 3/8"
1/2"
5/16 - 1/2"
5/8"
7/16 - 5/8"
3/4"
1/2 - 3/4"
7/8"
11/16" - 7/8"
1
"
13/16 - 1"
1-1/4"
1 to 1-1/4"
1-1/2"
1-3/8 to 1-3/4"
2"
1-3/4 to 2-1/8"
2-1/2"
2 to 2-5/8"
3"
2-3/4 to 3-1/2"
4"
3-1/2 to 4-1/2"
5"
4-1/2
to 5-1/2"
6"
SOFT CELL Backer-Rod: For
more irregular joints, on
tilt-wall / vertical joints, and to fill large construction gaps. Easily compressed. Color may be
light or dark gray,
and is not selectable.
Product Data Sheet
Joint
Width* SOFT
CELL
Backer Rod Size
1/16 - 3/16" use
closed cell -->
1/4"
1/8 - 1/4"
3/8
<-- click link for pricing & specs
5/16 -
1/2" 5/8
7/16 -
3/4" 7/8
5/8 -
7/8"
1-1/8
7/8 -
1-1/4"
1-1/2
1-1/8 -
1-1/2"
2
1-1/2 -
2
2-1/2
1-3/4
- 2-1/2" 3
2-1/4 -
3-1/2"
4
* SOFT backer rod is highly
compressible and can be easily used at widths as low as 40% of
product diameter (lower in small sizes). CLOSED CELL product can be used in all applications
where SOFT is specified.
HOT-ROD XL Backer Rod:
Chemically cross-linked closed cell. High-Temperature
resistant to 410F. For hot-pour, rubber-asphalt, and thermo-plastic
sealants. Resistant to gas, oil and most solvents. Commonly used in roadways,
runways, airplane hangers.
Product Data Sheet
Joint Width
3/16 - 1/4"
3/8"<-- click for pricing & specs
1/4 -
3/8"
1/2"
3/8 -
1/2"
5/8"
7/16 - 5/8" 3/4"
9/16 - 3/4"
7/8"
11/16" - 7/8" 1"
13/16 to 1" 1-1/4"
1 to 1-1/4"
1-1/2"
1-1/4 to 1-1/2"
2"
OPEN
CELL Foam Backer Rod: For
hot pour where out-gassing and bubbling is a problem, or where quicker curing
is needed (it enables 2-sided air exposure). Open cell foam is
enable air to reach both sides of joint. Its VERY soft and compressible. Resistant to gas, oil and most solvents. For Hot
Pour applications, generally the joint is thicker and closer to 1:1 size.
Small joints should have at least 3mm (.12" compression).
Available in black or yellow color.
Product Data Sheet or
Metric Open Cell Foam Rod
Joint Width
OPEN CELL
Backer Rod (all)
1/8" -
1/4" 3/8"
or 9mm
<-- click
5/16" - 7/16" 5/8"
(15mm)
7/16" -
5/8" 7/8"
(22mm)
9/16" -
7/8" 1-1/8"
(28mm)
3/4" -
1-1/4" 1-1/2"
38mm)
1-1/8" -
1-1/2"
2"
(50mm)
D-Shaped
Backer Rod
1/2
width
D-Shaped
Backer Rod
(= 1/2 size of the above yellow rod, Half-Rod) in yellow open foam material.
Ideal for
log-homes and tight-fitting, very shallow or V-shaped joints.
7/8" x 1650
feet
<-- click link for
pricing & specs
1-1/8" x 1100
feet
1-1/2" x 500
feet
2" x 400 feet
Product Data Sheets:
Closed Cell Backer Rod
(ground or wall)
Other
High Temp, Cross Linked, Closed Cell (hot pour, lower
cost)
Open Cell Backer Rod or
Metric Open Cell Foam Rod
(for lowest out-gassing,
hot pour,
most compression, resistant to gas, oil and most solvents)
Soft Cell
Backer Rod (wall applications / large gap variation)
MSDS
Sheets:
Closed Cell
and
Closed Cell
High Temp, Cross Linked, Closed Cell
Open
Cell Backer Rod
Soft Cell Backer Rod
Related
Backer Rod Products
Backer Rod Insertion Tools
Caulking Guns (Quality caulking guns at great prices).
Complete Information on Sealants
Diamond Blades (for grinding,
sawing crack chasing)
Expansion Joint
Expansion joint products
includes covers & seals for
roof-to-wall expansion
joints, curb mount / curb flange expansion joints,
corner and crossover
expansion joint covers, and straight flange
expansion joint covers.
Primers for sealants
Sealant Products By Family Type:
Expansion Joint Sealants (SL-1, SL-2 Self Leveling sealants)
Exterior Grade Sealants
(NP-1, TX-1, Duralink, Novalink, etc)
High Performance
Sealants (M-1, Sonolastic 150, Ultra)
Metal Roof & Siding Sealants (Duralink, etc)
Quick Cure, High Strength & Low Temp Cure Sealants (SB-1800
etc)
Structural Adhesive Sealants (Clear 25, M-1, SB-190,
Ultra)
Window & Glass-Roof Sealants (Clear 25, Sonolastic
150, M-1, Ultra)
Removing Old Joint Sealants, Cut-Out Tools
Placing
Backer Rod:
(photo courtesy ITP)
More Placement & Joint Illustrations:
Concrete Drive / Garage Expansion Joint Drawing
Concrete Drive / Garage Control Joint Drawing
Other Design Ideas for Many Types of Interfaces (see sections 4 to 14)
Joint Design (typical specification):
"Design and install all joint applications
per ASTM and SWRI recommendations and guidelines. Joints shall be designed
with a depth to width ratio of 1:2 (joint depth one-half the width). It is
recommended that the joint shall be no less then ¼” wide by ¼” deep (6 mm x
6 mm). The maximum depth of sealant shall be ½” (13 mm). The maximum width
is 2" (certain materials; some are limited to 1"). Control the depth of the
sealant by using a backer rod that is 25% larger then the joint opening at
75F temperature. Where the joint configuration will not permit a backer rod,
it is recommended that an alternative bond breaker be used. Prevention of
three-point adhesion is necessary through the use of a backer rod or bond
breaker tape to ensure proper joint movement and a long lasting weatherproof
seal."
Guide to
Joint Designs (see sections 4-14).
Applying Backer-Rod:
Backer Rod Insertion Tools
When working on concrete expansion joints, backer rod is used together with
SL1 & SL2
self-leveling sealants.
1. Joint or opening should be clean and dry and free
of all contaminates, loose materials, dry, and free of water or frost.
2. To install, compress backer-rod into the
joint before sealants are applied. Install backer-rod using a blunt tool or a plain faced
roller.
3. Force the rod to the depth recommended by sealant manufacturer, (typically
about 1/2 of joint width measured at the crown of the backer rod). A template or roller gauge may be used to
control the depth at which the rod is placed.
4. Don't stretch,
puncture or tear backer-rod during installation
but gently force into the joint so that the backer-rod
fits tight against the sides of the joint. Use a backer-rod roller or smooth
tool to set backer rod to proper depth.
5.
IMPORTANT NOTE FOR SELF-LEVELING SEALANT APPLICATIONS:
All Backer Rod sides, joints and end areas must be completely sealed against a
joint surface, otherwise Self Leveling sealants WILL run out of any gaps. Use
heavy masking tape on sidewalk edges.
Priming:
1. If joint priming is needed, follow suggestions for joint-sealant
application
as directed by sealant manufacturer.
2. Where necessary, primer
should be applied only to the edges of the joint surface and allowed
to dry before Backer-Rod is placed. DO
NOT prime Backer-Rod.
How Much Sealant?
Link to Calculator
Applying Sealants:
1. Where priming of the surface
material is necessary, primer should be applied only to the sides of
the joint surfaces and allowed to dry
tack-free before the Backer-Rod is placed. DO NOT prime the Backer-Rod.
Many primers ARE STAINING, be careful where they are applied.
2. Follow suggestions for joint-sealant application as directed by
the sealant manufacturer.
3.
As needed, tool to desired shape using a caulking
tool or old spoon.
Hint: For polyurethanes, wet the tool regularly with water or
toluene to enable a smooth
surface. Soapy water is not recommended as some soaps can interfere
with joint bonds.
4. Most products need 24 hours
minimum cure before applying any type of over-coating. Follow the
manufacturers recommended cures.
HINT: For
those not who are not professional applicators, use masking tape on
surfaces where you do not want sealants. Sealants are very difficult
to remove from unwanted areas.
Soft Backer Rod vs.
Closed Celled Backer Rod:
-
Soft Cell
is generally used in vertical applications, above ground, or where
joints are more irregular, and to fill air-gap spaces in general
construction.
-
Closed
celled is generally used for ground level applications and high moisture
environments. It can be used anywhere the soft-celled is used.
-
Soft
celled compresses up to 90% in smaller sizes and 50% in larger
sizes.
-
Closed
celled compresses up to 50% in smaller sizes and 30% in larger
sizes.
-
Either
can be used with Self-leveling sealants and Vertical Joint Sealants.
-
Both
closed and soft cell are Polyethylene based (polyolefin).
-
Both have
color variation in the
manufacturing process or suppliers.
Open Cell ("Denver Foam") Backer Rod:
-
Open-cell
soft backer rod is highly compressive. It serves as a
backing for caulking, sealants and all types of hot pour, chemical
sealant and cold sealant products.
-
It is
yellow in color, odorless and chemically inert, made from Polyurethane.
-
Open cell
backer "Denver Foam" rod can take up to 500F during hot applications
and is compatible with all types of ASTM D3405, D1956 and C1330 hot pour
and chemically cured sealants.
-
Open cell
allows air to reach sealant from BOTH sides during cure, providing a
bubble free, faster, more uniform cure.
-
Open cell
construction eliminates out-gassing and cold flow problems sometimes
associated with certain materials.
-
Open cell
backer rod can also be
"saturated" with sealant and used to "carry" sealant to difficult-to-reach
repair areas and to create underwater "plugs" (normally it
will not absorb sealant without "working it" in).
Backer
Rod Applications:
-
General
Purpose Sealant backing
-
Expansion
joints
-
Irregular
joints
-
Log home
chinking
-
Metal
roof seam and pre-cast panels
-
Around
perimeters of door and window frames
-
Concrete
Expansion Joints
-
Parking
Garages
-
Coping
and glazing joints
-
Swimming
Pool Decks
-
Highways,
roads, bridges, concrete joints
-
Airstrips
and Runways
-
Glazing
- Log Cabin Chinking
| |
| Meets ASTM
C1330 |
X
|
X
|
|
X
|
| Meets
ASTM D5249 |
X
|
X
|
X
|
|
| Meets ASTM
C717 |
X
|
|
|
|
| Cold Applied
Sealant Use |
X
|
X
|
X
|
X
|
| Hot Pour Sealant Use |
|
|
X
|
X
|
| Round Foam Rod |
X
|
X
|
X
|
X
|
| Non-gassing |
|
|
|
X
|
| Polyethylene |
X
|
X
|
X
|
|
| Polyurethane |
|
|
|
X
|
| Non-absorbing Skin |
X
|
X
|
X
|
|
| Cross-linked |
|
|
X
|
X
|
| Prevents Bubbling |
X
|
|
|
X
|
| Closed Cell |
|
X
|
X
|
|
| Type B |
X
|
|
|
|
| Type C |
|
X
|
X
|
|
| Type 1 |
|
|
X
|
|
| Type 3 |
X
|
X
|
|
|
| Type O |
|
|
|
X
|
TECHNICAL DATA, TYPICAL PHYSICAL PROPERTIES:
CLOSED
& SOFT
Cell Backer Rod:
- Density: 2.0 lbs/ft3 ASTM D-1622
- Tensile Strength: 50 lbs/sq inch ASTM D-1623
- Moisture Absorption: Less than 1% by volume
ASTM C-1083
- Temperature Service Range: -90ºF to +210ºF
- Compression Deflection, 5 PSI @ 25%, ASTM D-1621
(Closed Cell)
- Compression Deflection, 5 PSI @ 50%, ASTM D-1621
(Soft Cell)
- Water Absorption: 0.02% by volume,
ASTM-C-509 (Closed Cell)
- Water Absorption: 0.05% by volume,
ASTM-C-509 (Soft Cell)
- R-Value = 3 per inch of thickness.
- Thermal Conductivity (W/M.°C) =
0.036
HOT ROD XL, Hot Pour Backer
Rod:
- Density: 2.0 lbs/ft3 ASTM D-1622
- Tensile Strength: 31.4 lbs/sq inch ASTM D-1623
- Temperature Range: -90ºF to +410ºF
- Compression Deflection, 4.7 PSI @ 25%, ASTM D-1621
(Closed Cell)
- Water Absorption: 0.02% by volume,
ASTM-C-509
- Water Absorption: 0.03 gm/cc,
ASTM-C-1016
OPEN
Cell Backer Rod:
- Density: 1.7 lbs/ft3 ASTM D 1622
- Tensile: 25 lbs/sq inch ASTM D 1623
- Moisture Absorption: .024% by volume ASTM C 509
- Out Gassing: None Open Cell
- Temperature Service Range: -60ºF to +400ºF
U.S. Department of Commerce National Institute of Standards
- R-Value = 3 per inch of thickness.
- Thermal Conductivity (W/M.°C) =
0.036
- Auto Ignition: 700-800ºF
- Elongation: 90% ASTM D 3574
- Air Flow: 90% ASTM D 3574
- Compression set 5% or less (after 80% compression for 30 days)
ASTM D 3574
Our Soft, Closed
Celled and Hot Rod backer rods are all polyolefin based. A polyolefin is a
polymer produced from a simple
olefin (also called an
alkene
with the general formula CnH2n) as a
monomer.
For example,
polyethylene is the polyolefin produced by polymerizing the olefin
ethylene.
Polypropylene is another common polyolefin which is made from the
olefin
propylene.
SOFT Backer Rod
& Construction Uses: Soft Backer Rod for residential
construction is also commonly used to seal air gaps around wall or joint
cavities, between pre-hung doors and windows and rough openings in
wood frame homes. The low compression deflection and high compression
recovery of these products will not bow windows or door jambs and
adapts to seasonal joint movement. Specific uses for Soft Backer Rod
includes log homes, marriage joints, sealing at attic access openings,
casement window joints, some dry wall applications, wall to wall
joints, wall to floor joints, and roof to wall joints, and around
doors and windows in wood frame structures.
Compatibility:
Our our backer rod products are an inert composition and therefore
compatible with all known cold applied sealants including butyl,
polysulfide, vinyl acetates, PVA, acrylics, polyurethanes,
tri-polymers and silicones. They are chemically inert and will resist
oil, gasoline and most other solvents. These materials will not stain
nor adhere to sealant materials and are non-exuding. For HOT pour and
chemical sealants, use Hot-Rod or the Open Cell Foam. If bubbling /
gassing is a problem, Open Cell Foam is best. More Information can be
found in the Technical Data Sheets.
EIFS Construction
and Joint Design: See the
EIFS Guide for details.
Trouble-free EIFS application is accomplished by
forming a 1/2" to 3/4" sealant gap wherever EIFS meets a non-EIFS
material, such as roofing, trim, or doors and windows, according to
the EIMA EIFS Guide. The correct gap makes it possible to finish the
exposed edges of the expanded polystyrene, which should be wrapped
with reinforcing mesh before the EPS is secured to the sheathing with
a waterproofing application of base coat. Then the rest of the finish
goes on. Finally, the gap is filled with soft or closed-cell backer
rod and a bead of compatible sealant.
Novalink Polyether Sealant is an excellent sealant for this
applications.
Textured Sealants are also available which cure textured to look
stucco-like.
Shipping Backer Rod: Backer Rod
although inexpensive, can be expensive to ship. This is because of the
large volume of space it takes in boxes. Dimensional weight applies.
More information is here: UPS
Dimensional Weight and Oversized Packages
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