Complete Your 4" LED Slim Light Installation the Right Way The Ortech VB-S4 Vapour Barrier is the essential companion accessory for your 4" LED slim recessed light installation. Designed specifically to create an airtight seal between your LED slim light and the ceiling cavity, this vapour barrier plays a critical role in maintaining your home's thermal envelope — especially important in Canada's demanding climate. Why a Vapour Barrier Matters When installing recessed LED lighting in insulated ceilings, gaps and air leakage can lead to energy loss, moisture infiltration, condensation, and even mold issues over time. The VB-S4 is engineered to prevent exactly that. By sealing the fixture opening, it keeps warm interior air from escaping into the attic space, helping you maintain energy efficiency and meet building code requirements across Canadian provinces. Built for Compatibility and Ease of Use Sized precisely for 4" LED slim recessed lights, the VB-S4 installs quickly and cleanly without special tools. Whether you're a contractor, electrician, or dedicated DIYer, this vapour barrier ensures a professional-grade finish every time. It pairs perfectly with compatible Ortech 4" slim LED downlights for a complete, code-compliant installation. Available at Lumibox.ca At just , the VB-S4 is a low-cost upgrade that protects your investment and improves long-term performance. The full technical documentation (PDF spec sheet) is available for download directly on this product page. Stock up today and install with confidence.