The M-D Building Products pro pack 3/8 inch x 350 feet green backer rod acts as a filler in small gaps before applying caulk. It insulates as well as cushions. Use in pavement cracks， wall joints and foundations. Backer rod is easily trimmed to size with scissors.

• Brand Name: M-D
• Color: Gray
• Material: Foam
• Product Type: Caulk Backer Rod
• Application: Door and Window
• Length: 350 ft.
• Thickness: 3/8 in.
• Self Adhesive: No
• Hardware Included: No
• Packaging Type: Boxed
• Fills gaps and openings to prevent drafts
• For small gaps
• Pro Pack
• Provides a sound surface for caulking projects
• Saves on caulk usage