3 Seals Under Door Threshold Seal is a heavy duty under door weatherstripping seal designed with 3 sides featuring 3 different dimensions to fill up to a 1" gap, offering versatile protection for garage and door applications. Made from lifetime silicone rubber, it effectively shields against water, wind, debris, and rodents, making it ideal for hurricane-prone areas. This durable seal reflects 3 Seals’ commitment to providing reliable, high-quality rubber products that enhance home and commercial protection. Portable and easy to install with no tools necessary, it delivers a convenient weatherproofing solution that stands up to tough conditions. Trust 3 Seals for a professional, long-lasting seal that keeps your space secure year-round.