Foam Backer Rods are versatile, closed-cell polyethylene foam rods designed to provide precise control over sealant depth. Available in a range of sizes from 5mm to 40mm, they’re perfect for inserting into joints or expansion joints to regulate sealant depth and create a reliable barrier against moisture and weather elements. These soft and pliable foam rods effectively fill in cracks and gaps, making them ideal for various applications such as glass installations, expansion joints, door and window seams, pavement joints, and even craft projects. Craft Foam Rods offer excellent resistance against water, oil, and most solvents, ensuring long-lasting durability and reliability.”