To maintain the integrity of the product, units to be installed in or shipped through high altitude areas may not include argon gas. Also, small cutlites may not include argon gas. The primary seal of the dual seal construction is compressed polyisobutylene, while the secondary seal is silicone. Single-pane glass is available. Tempered glass is a standard safety feature on doors, and may be requested for windows as well.
Laminated glass is available for the ultimate in uv blockage.
LoE Sun-145 is an available glass option. It is useful in very warm climates where maximum solar control is necessary. It is less expensive than tinted glass and achieves solar control over a wider range of the spectrum than other types of glass. LoE Sun-145 may be ordered with or without argon gas. For more visual interest, patterned, bronze and gray-tinted glass may be requested.