Sliding Window Seal Strip Set | 9m Outer Inner & Middle Kit

Complete Sliding Window Seal Strip Set – Outer, Inner & Middle Gap

Upgrade your plastic steel sliding windows with this comprehensive 9-metre Window Seal Strip Complete Kit. Designed specifically for plastic steel (uPVC) sliding windows, this three-part set covers every gap to keep your home draught-free, quieter, and better insulated year-round.

What's Included

• 3m Outer Seal Strip – Blocks exterior draughts and moisture from entering around the window frame edge
• 3m Inner Seal Strip – Creates a snug internal barrier to improve thermal efficiency and reduce noise
• 3m Middle Gap Seal Strip – Fills the central track gap between sliding panels for a tight, secure closure

Key Features

• 🪟 Designed for Plastic Steel Sliding Windows – precision-engineered profile fits standard uPVC window tracks
• 🌬️ Draught & Dust Resistant – seals all three critical zones for maximum coverage
• 🔇 Noise Dampening – cushioned seal material reduces wind and external sound transmission
• 💧 Moisture Barrier – helps prevent condensation and water ingress around window edges
• 🔧 Easy Self-Installation – no tools required; simply press and fit into the window track
• ♻️ Durable Plastic Material – resists wear, compression set, and seasonal temperature changes
• 📏 9 Metres Total – generous length provides full coverage for most standard sliding window setups

Specifications

How to Install

1. Clean the window track thoroughly and allow it to dry completely.
2. Measure the required lengths and cut the seal strips accordingly.
3. Press the outer seal firmly into the exterior groove of the window frame.
4. Fit the inner seal along the interior channel for an insulating barrier.
5. Insert the middle gap seal into the centre track between the two sliding panels.
6. Test the window slide action and adjust as needed for smooth operation.

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For general home improvement guidance, visit the U.S. Department of Energy – Air Sealing Your Home resource.

Frequently Asked Questions

Q: What type of windows is this seal strip set compatible with?

A: This seal strip set is specifically designed for plastic steel (uPVC) sliding windows. The profile dimensions are engineered to fit the standard track channels found on most plastic steel sliding window frames. It is not intended for aluminium or wooden framed windows without verifying the track size first.

Q: How much total sealing coverage does this kit provide?

A: The complete set provides 9 metres of seal strip in total — 3 metres each of outer seal, inner seal, and middle gap seal. This is generally sufficient to seal a full standard sliding window or two smaller windows, depending on their dimensions.

Q: Is any special adhesive or tools needed for installation?

A: No special tools or adhesives are required. The seal strips are designed to press-fit directly into the window track grooves. Simply clean and dry the tracks beforehand, then press each strip firmly into its corresponding channel for a secure fit.

Q: Will these seal strips affect how smoothly the window slides?

A: When correctly installed, the seal strips maintain smooth window operation while filling gaps tightly. They are flexible and designed not to impede the natural sliding action of the panels. If resistance is felt, check the strip is seated evenly and trim any excess length.