Ultrex is 8X more rigid than vinyl and is built to last.

Patented performance.

The strength of Ultrex starts with our patented fiberglass pultrusion process.

What starts as strands of glass finishes as the strongest window material on the market. Ultrex is lightweight and as strong as steel.
Ultrex is much stiffer than vinyl and wood/vinyl composites. Ultrex has a higher tensile strength than steel.

Strong as steel.

You won't find a stronger window or door material than Ultrex. Just one inch of Ultrex can hold up to 34,000 pounds. It’s so tough we use diamond edge blades to cut it!