Heat Block - Efficiently blocks drafts by sealing gaps, reducing energy consumption and helping indoor temperatures stay stable for comfortable living and working conditions. Versatile Compatibility - Designed for casement and roof windows, making it suitable for both home and workplace use. Easy to Install - Peel and stick installation with no professional tools required. Simple to apply and remove, enabling convenient adjustments. Tough and Sturdy - Built with high-density sponge material for lasting use and dependable stability, maintaining effective window AC sealing across varying temperatures. 2-3 Practical use scenarios - Home cooling and comfort: Use with a window air conditioner in a living room to prevent cool air from escaping and to reduce energy bills. - Office or workshop climate control: Apply to a casement or roof window to maintain a consistent temperature and lower HVAC load. - Seasonal or rental applications: Install before guests or seasonal occupancy for quick, tool-free sealing; easy removal afterward for flexible use.