BACKER ROD - 1/2" X 20FT FILLER

Large gaps need a filler behind the caulk, and backer rod keeps the sealant at the right depth while saving material. This 1/2" poly foam rod in a 20' length presses into joints and openings before sealing, so far less caulk is needed to fill the gap. It works with virtually every type of caulk and sealant.

Key Features:

• Reduces Caulk Needed -- Fills the depth of a large gap so only a bead of sealant is required.
• 1/2" Diameter -- Sized for common joints and gaps around windows, doors, and trim.
• 20' Length -- A long roll for multiple joints in a single job.
• Durable Poly Foam -- Resilient foam holds its shape under the sealant.
• Works With Any Sealant -- Compatible with virtually every type of caulk and sealant.

Where to Use:

• Window and door joints -- Filling wide gaps before caulking.
• Siding and trim -- Backing joints in exterior trim and siding.
• Draft sealing -- Pressing in place to block air leaks before sealing.