Horizontal Sliders are a flexible and slimline Secondary Glazing method that is on the market with a combination of two to 5 panels, they include things like twin brush seals that supply ideal thermal and acoustic insulation. Horizontal sliding for 4mm glass or plastic sheet using specially built self-adhesive tracks. https://beauty-products68999.mybjjblog.com/5-easy-facts-about-secondary-glazing-described-45060354