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Weatherstripping for Windows & Doors | Foam-Filled Bulb, Q-Lon, T-Slot | AmesburyTruth Parts

Foam-filled bulb, Q-Lon, and T-slot weatherstripping provide superior sealing against drafts, moisture, and noise for windows and doors. These durable, flexible seals help maintain indoor comfort and energy efficiency while extending the lifespan of your window and door systems. Products in this collection are manufactured by AmesburyTruth, ensuring reliable fit and long-lasting performance.
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Foam-filled bulb weatherstripping, Q-Lon seals, and T-slot bulb weatherstrips are essential components for achieving top-tier insulation and weather protection in residential and commercial window and door systems. These parts deliver a tight, flexible seal that prevents air and water infiltration, supports quieter interiors, and increases energy efficiency by minimizing heat loss. Whether you're upgrading aging seals or completing a full restoration, this collection features industry-leading weatherstripping engineered for both ease of installation and lasting durability.

Key Features and Benefits

  • Foam-filled bulb weatherstripping uses a resilient foam core to maintain shape and maximize compression, providing a reliable barrier against air and water leaks.
  • Q-Lon weatherstripping features a durable polyethylene cladding over flexible urethane foam, offering UV resistance, low friction, and long-lasting spring-back for repeated opening and closing cycles.
  • T-slot weatherstripping is designed to slide into matching window or door slots, ensuring a secure, consistent fit for popular systems, including those using a .187 t-slot foam filled bulb weatherseal.
  • All products in this collection are authentic AmesburyTruth parts, trusted by industry professionals for reliable performance and compatibility with major window and door brands.

Use Cases and Compatibility

These weatherstripping solutions are ideal for replacing worn or damaged seals in casement, double-hung, sliding, and patio doors and windows. Foam-filled bulbs and Q-Lon weatherstrips are commonly used in wood, vinyl, or aluminum frames, and are precise replacements for original equipment on brands supported by AmesburyTruth. Homeowners, maintenance professionals, and window installers choose these products for their proven sealing performance and straightforward installation process. For example, a popular Q-Lon foam seal is commonly used in casement window frames, while a T-slot foam filled bulb offers a secure slide-in fit for vinyl window systems.

Installation and Replacement Tips

Replacing weatherstripping is typically a DIY-friendly project, but professional techniques ensure the best results. Key steps include carefully removing the old seal, cleaning the kerf or slot, and measuring lengths for an exact fit. Many products, such as this kerf-back polyflex foam bulb, can be pressed or slid into place without adhesives. For best performance, check the manufacturer's dimensions for your specific window or door model. Always confirm compatibility with your frame's slot style, such as the .187 t-slot, to ensure the replacement stays firmly in place and seals reliably.

About AmesburyTruth Weatherstripping

All weatherstripping in this collection is manufactured by AmesburyTruth, a respected leader in door and window components. Their products are engineered for precision fit, excellent resilience, and resistance to UV exposure, moisture, and daily use. As an authorized reseller, TruthParts guarantees you will receive genuine, high-quality AmesburyTruth replacement parts every time.

Frequently Asked Questions

  • What's the difference between Q-Lon and foam-filled bulb weatherstripping? Q-Lon incorporates a foam core with a polyethylene cladding for extra durability and UV resistance, while standard foam-filled bulbs focus on compressible sealing for a variety of frame types.
  • How do I know which T-slot size to choose? Measure the width of your current T-slot; the .187 t-slot foam filled bulb weatherseal is a common size but always verify with your existing frame or original specs.
  • Can I use these weatherstrips on doors as well as windows? Yes, most profiles are suitable for both window and door applications as long as the slot and compression fit match your frame.

For further options, see the T-slot style Q-Lon weatherstrip or the kerf style foam-filled bulb for different frame configurations and reach lengths.