The 3mm Flexible Secondary Glazing Kit is a complete DIY secondary glazing solution designed for use with 3mm glazing sheet, helping to improve thermal insulation, reduce draughts, minimise condensation, and reduce external noise. Ideal for upgrading existing windows without the cost of replacement, this kit provides a clean, professional finish for homes, offices, listed buildings, and conservation properties.

Each kit includes 15 metres of flexible edging specifically designed for 3mm glazing sheet, along with turnbuttons, fixing screws, and a mitre gauge for creating accurate 45° corner joints. Designed for use with the Clipglaze secondary glazing system, the flexible edging is easy to install and can accommodate straight runs and gentle curves for a secure, reliable fit.

Manufactured from high-quality, durable materials, the 3mm Flexible Secondary Glazing Kit is suitable for both DIY enthusiasts and professional installers. Compatible with 3mm acrylic and other suitable glazing sheets, it provides a long-lasting, low-maintenance solution for improving energy efficiency, reducing heat loss, and enhancing comfort while maintaining the appearance of existing windows. Additional sizes, accessories, and colour options are available to suit a wide range of secondary glazing applications.