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).