Frost King C21H Caulk Saver Backer Rod, 3/8 In. x 20 Ft.

A caulk saver backer rod is a polyfoam insert that sits behind caulk in wide gaps and cracks, significantly reducing the amount of expensive caulk needed to complete the job. This foam rod fills space efficiently while providing a stable base for caulk application, making it an essential tool for both contractors and DIY home improvement projects.

The Frost King Caulk Saver works with virtually every type of caulk and sealant. Simply press the rod into the gap, then apply caulk over it. The durable, resilient polyfoam resists moisture, delivering professional results while reducing project costs.

Features and Benefits

• Reduces Caulk Consumption: Fills large gaps efficiently, lowering the cost of materials by using less expensive caulk to complete the same project.
• Works with Virtually Every Type of Caulk and Sealant: Compatible with standard caulks and sealants without limitation.
• Moisture-Repellant Material: The polyfoam resists moisture to maintain integrity over time.
• Press-in-Place Installation: No tools or special equipment required—simply press the rod into the gap and apply caulk on top.
• 20-Foot Length: Provides sufficient material for most projects from a single roll.

Specifications

• Brand: Frost King
• Model: C21H
• Diameter: 3/8 inch
• Length: 20 feet
• Material: Polyfoam
• Color: Gray