Ultrex and Fiberglass Facts

  • Marvin’s patented Ultrex® fiberglass is an inert material that is nonpolluting.
  • Ultrex® fiberglass rovings and mats are made from pure silica sand, requiring less energy to produce into a finished product than vinyl.
  • Sand is a naturally occuring product that does not contribute to environment degradation or deforestation.
  • Infinity from Marvin replacement windows and patio doors are made from exclusive Ultrex, a pultruded fiberglass material 8.5 times stronger than vinyl, 3.5 times stronger than composite, and 3 items stronger than wood.

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