- Complete Light Blockage: Our white weather stripping features a dark gray foam core that effectively blocks all light from entering around your door, ensuring a dark and comfortable environment. Ensure your door jamb has a groove for proper kerf-style installation. - Extra Long Coverage: With a generous length of 40 feet, this weather stripping is perfect for various door sizes. Designed with a 5/32 inch spine, it fits 1/8 inch grooves and seals gaps from 1/4 inch to 1/2 inch. Be sure to measure your groove size before purchasing for the best fit. - Durable PVC Flange: Our kerf door seal includes a robust PVC flange, ensuring a secure attachment to grooved door frames. The tear-resistant PE cover combined with high-resilience PU foam provides long-lasting durability and flexibility, maintaining a reliable seal in all temperature conditions. - Hassle-Free Installation: No adhesive is required—simply measure, cut, and insert the flange into the groove for a tight, secure seal that stays in place. Use scenarios: - Block light in bedrooms or home theaters by installing this weather stripping around doors. - Reduce drafts and improve energy efficiency in your home by sealing gaps around exterior doors. - Enhance privacy in office spaces or studios by effectively preventing light infiltration around your office door.