Backer Rod 7/8" Bulk 850' Roll

Get the caulk joint right from the start. This backer rod controls sealant depth and shape for stronger, longer-lasting joints that flex without cracking.

Key Features

• Closed-cell foam
• Controls sealant depth
• Bulk roll

Common Applications

• Concrete, siding and window joints
• Expansion joints

Related Products & Sizes

• Also available in: 1" 600'
• Caulking and sealants

Installation & Use Notes

• Choose a rod about 25% larger than the joint
• Don't puncture the rod