ASWF window tint The latest enhancement to our signature Excel product, Excel IRP, (IR Performance) incorporates an IR nano-particle coating that maximizes optical clarity while building a comprehensive shield of protection from heat, glare and harmful UV and IR rays. The remarkable solar control and color stability of the non-metal Excel IRP, along with its uncompromising aesthetics, places it a cut above other IR blocking films. As with all other ASWF products, it is endorsed with a lifetime factory-backed warranty.