DuraSeal™ Windows from Window Mart Windows & Doors Nearly 65% of a window's surface area is made up of glass. That's why it's so important to choose well insulated glass units. Window Mart uses DuraSeal™ technology on its windows for better performance and efficiency over the standard U-channel roll formed metal spacer: Less Conductivity - 50% better insulation of frame and edge of glass (90% better than aluminum spacer bar) for increased energy savings Improved Condensation Resistance - 10% increase in edge of glass temperature for warmer windows Superior Argon Gas Retention - DuraSeal™ adhesive minimizes gas loss to maintain thermal properties Reduced Total Window U-Value - up to 3% (and up to 6% compared to aluminum spacer bar), which can mean the difference in meeting the Energy Star® requirements Extensive Testing Under All Conditions - maintains excellent adhesion in hot or cold climates, exceeding the challenges of every major durability test in the U.S. Window Mart also offers other glass options: Bronze Glass with more tint to reduce glare, Obscure Glass for privacy without shades or blinds. Series 2600 / 2900 Double Hung, Double Slider, Picture, Replacement Only Virgin Sunshield™ PVC Vinyl DuraSeal™ Warm Edge Flexible Spaer System E-Z Tilt (double hung only) Sloped Sill 7/8" Insulated Glass Units Fusion welded sash and main frame Twin vent locks (double hung only) Dual cam locks (sash size permitting) Head and Sill Expanders Multi-point weather-stripping 3 1/4" Frame Depth Full Screen (Double hung and slider only) Series 4300 Casement, Awning, New Construction or Replacement Virgin Sunshield™ PVC Vinyl DuraSeal™ Warm Edge Flexible Spaer System 3/4" Insulated Glass Units Fusion welded sash and main frame Multi-point weather-stripping 3 1/4" Frame Depth Full Screen Extruded Nail Fin (removable for replacement applications) Garden Units Custom built to your design specifications Specialty shapes available Window Mart windows are built to last a lifetime, and warranted for life. To learn more about Window Mart windows and how we can customize your installation options, contact us today for an appointment!