Product Details:
Allows Easy Control of Sealant Application Thickness
Won't Adhere to Sealants; No Bond Breaker Needed
Compatible with All Cold-Applied Sealants
CRL Closed Cell Backer Rod is a round, flexible,
closed cell polyethylene foam with an exterior "skin"
used as a backing and thickness control device for elastomeric and
other cold-applied sealants. The Backer Rod becomes an integral
part of the joint into which it is installed, and therefore is
available in a range of diameters to accommodate joints from
3/16" to 1-5/8" (5 to 41 mm). It limits the depth of the
sealant, thereby preventing excessive use of the sealant, which
promotes proper joint design. Because the sealant will not bond to
the "skin" of the rod, it can stretch and recover with
joint movement, with minimal stress being put on the points of
adhesion to the substrate.
Diameter of Rod: 1/2 in (13 mm)
Feet per Bulk Case: 800 ft.
CRL Closed Cell Backer Rod will not absorb water or wick water to
joint walls, which could cause adhesive failure. It is compatible
with cold-applied sealants, and its round shape promotes the
preferred "hourglass" shape for joint sealants. It
withstands hot and cold temperature extremes from -45° to 160°F
(-43° to 71°C).
CRL Closed Cell Backer Rod is chemically inert, and resistant to
oils, gasoline, and solvents. It will not stain or
"bleed" into sealant material. Backer Rod is typically
used in expansion/control joints where cold-applied sealants are
used. These joints would normally be found in curtain walls,
construction partitions, precast panels, parking decks, door and
window frame perimeters, coping, floor and deck joints, horizontal
traffic joints, and building rehabilitation projects.
Proper size selection of CRL Closed Cell Backer Rod is important as
it controls the depth of the sealant bead. It must be approximately
25% wider than the joint to fit tightly, and function as a bond
breaker to prevent bottomside adhesion of the sealant. Always
install using a blunt tool or roller. Cat. No. SBRR Backer Rod
Roller is designed specifically for the smooth installation of all
types of backer rods.
NOTE: Do not tear, puncture, crease, over compress or
stretch during insertion. Always use the correct size Backer Rod
for the particular application. Refer to the size selection chart.
Do not use with hot-applied sealants or hot melt adhesives where
their surface temperature is over 160ºF (71ºC).