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Timber Foam Flipper Seals

Over time the seals around your timber windows and doors become less effective at preventing damage to your home, saving you money and keeping you warm and comfortable. Replacing these seals when they begin to perish is essential for protecting your property from damp and draughts. Aquamac 21 from Schlegel is a flipper seal manufactured from high-quality Polyurethane foam. It is designed to be used as a replacement seal in timber frames on windows (Casement and Sash) and doors.

Seals within the Aquamac range offer excellent recovery so return to their original shape after compression. They will not shrink or stretch and are resistant to dirt, grime, mould and mildew. They are fitted into a groove in your frame creating an air and watertight seal when the window or door is closed. They can be easily cut with a pair of scissors.

All Glazing, Door & Window Seals


Schlegel Aquamac 21 White Foam Flipper Seal (QL3009)

Colour: White
Fits 3mm x 6mm Groove
Seals Gap 4 to 7.5mm
Coil Length: 50m
£ 6.80 £ 6.80 6.8 GBP
Per Metre


Schlegel Aquamac 21 Bronze Foam Flipper Seal (QL3009)

Colour: Bronze
Fits 3mm x 6mm Groove
Seals Gap 4 to 7.5mm
Coil Length: 50m
£ 6.80 £ 6.80 6.8 GBP
Per Metre

Frequently Asked Questions

Q-Lon is a type of weatherstripping commonly used in doors and windows to provide an effective seal against air, noise and weather elements. The key characteristics of Q-Lon include:

Material: Q-Lon weatherstrips are manufactured with a polyurethane foam core, which is highly resilient and durable, combined with a polyethylene outer skin. These sections also contain a polypropylene base insert to provide rigidity. This combination provides excellent compression and recovery properties allowing for repeated compression with confidence that the profile will return to its original shape.

Durability and Performance: Q-Lon seals are known for their long-lasting performance. They are resistant to weather, moisture, temperature variations and UV light. This makes them suitable for a wide range of climates and conditions. Their durability ensures that they do not degrade, crack or wear out quickly, providing a consistent and reliable seal for an extended period.

Energy Efficiency: Due to their excellent sealing capabilities, Q-Lon weatherstrips are effective in reducing air infiltration and improving energy efficiency in buildings. By sealing gaps around doors and windows, they help to maintain indoor temperature, reduce energy costs and increase overall comfort.

Noise Reduction: Q-Lon seals also offer good acoustic properties, helping to reduce noise transmission through gaps in doors and windows, which contributes to a quieter indoor environment.

The Aquamac 21 is renowned for its high performance sealing properties, enhancing insulation and energy efficiency in buildings by keeping out cold drafts and retaining indoor temperatures. It offers robust protection against weather elements like rain and wind. The Aquamac 21 also plays a key role in reducing external noise pollution, creating a quieter indoor environment.

Known for their durability and versatility, seals within the Aquamac range fit various window and door designs, making them a cost-effective and practical choice for both new constructions and renovations.

Schlegel Q-Lon foam flipper seals push into the groove around the frame on your window or door. You need to ensure that this groove is clean, dry and free from dirt or debris before inserting the seal. Cut the seal to the required length and gently push it into the groove all the way around the frame. It is important to make sure that the flipper does not sit too high in the groove as this may over compress the section and cause it to fail.

When tested in accordance with the requirements given in BS En 12365-1, the Schlegel Q-Lon foam flipper seal has the following classification;

Category of Use: W
Working Range: 3
Linear Compression Force: 2
Working Temperature Range: 2
Deflection Recovery: 6
Recovery After Aging: 6

Deciding on the best replacement foam flipper seal for your window or door may seem like a complicated task. Although this section may not seem like the most important part of your window or door, it is essential for reducing draughts, water ingress and keeping your home warm and comfortable.

Our extensive range of Schlegel seals allows you to choose a replacement section that fits the gap you are looking to fill. All of these products are manufactured from a high-quality Polyurethane and Polyethylene and have been specifically designed for residential and commercial windows and doors.

For further information or technical support with choosing the best replacement section for your home, you can get in touch with our knowledgeable team. If you would prefer, you are welcome to send us a sample of your existing section for identification. We can use this to help you identify a suitable replacement.