Our 1/4 inch backer rod, crafted from high-quality foam rubber, is the perfect solution for concrete expansion joint filler and caulking needs. Measuring 100 feet in length, it's easily customizable to fit any project size, ensuring no waste. Its flexible and resilient material conforms to irregular joints, providing a strong foundation for caulking adhesion. Non-absorbent and self-recovering, it prevents moisture ingress and ensures a durable seal. Ideal for concrete caulking but also suitable for pavement collisions, wall joints, and foundations, its versatility is unmatched. The classic grey color seamlessly integrates with various styles, making it the go-to choice for professionals and DIY enthusiasts alike. Simplify your concrete caulking projects with our efficient and reliable backer rod.