Our window spacer is different than any other spacer on the market. It is made of silicone foam which has supreme condensation performance and extremely low thermal transmittance. The multi Mylar barrier provides superior insulating gas retention. It’s long term durability sets it apart from other spacers on the market. It won’t warp or melt like other spacers out there. Dual acrylic adhesive seal and butyl perimeter sealant provide triple seal performance. Your new home windows will stay energy efficient for life with these spacers.