ASIN B000BQWOC0Image via Amazon
MD Building Foam Backer Rod, Gray, 1/2in x 20ft for Medium Gaps | Closed-Cell Foam, Prevents Caulk Waste, Cuts With Scissors, Blocks Drafts Moisture Dust Insects, Indoor/Outdoor
- Quality Construction
- Concrete Gap Filling Excellence
- Complete Gap Solution
- Effortless Installation
$4.47
Price as of Oct 16, 2026, 7:48 AM UTC. Prices and availability are subject to change. The price shown on Amazon at the time of purchase applies.
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Key features
Quality Construction
This gap filler is made from high-quality, weather-resistant materials, ensuring long-lasting durability and performance. It effectively seals medium gaps between surfaces, preventing drafts and dust from entering your home. Suitable for both indoor and outdoor use, it withstands various weather conditions, providing consistent protection and improved comfort.
Concrete Gap Filling Excellence
Our product excels in filling concrete gaps, creating a strong foundation for caulking projects. Utilize this foam to effectively fill joints between surfaces, ensuring dependable adhesion for caulking applications that promise enduring durability and resilience.
Complete Gap Solution
This product provides versatile gap filling, preventing drafts and offering a sturdy base for caulking. Perfect for expansion joints in driveways and sidewalks, it can be twisted for larger gaps and easily trimmed with scissors to the desired size.
Effortless Installation
Enjoy a hassle-free setup by effortlessly pushing the backer rod into most joint openings until it fits snugly. Once installed, enhance the seal further by applying caulk on top—no need for messy sealants or adhesives.
Versatile Application
From repairing leaky roofs and window sills to addressing drafty doors, the Backer Rod is your go-to solution! Beyond sealing surface gaps, it excels in insulating, enhancing airtightness, and damp-proofing your home—offering multifaceted benefits for various household needs.
MD Building Foam Backer Rod, Gray, 1/2in x 20ft for Medium Gaps | Closed-Cell Foam, Prevents Caulk Waste, Cuts With Scissors, Blocks Drafts Moisture Dust Insects, Indoor/Outdoor
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