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Aptra® UV8
Powerful roof underlayment

The powerful solution
for roof underlaymenent


  • Highest barrier properties
  • Consistent breathability
  • Composite with other materials
RKW Group - Product Aptra


Aptra® is a breathable film used as a composite with other materials. Though it barely registers on the scales, this unique film provides an exceptional combination of barrier properties and breathability. Aptra® is easily laminated with a wide variety of substrates using several methods. Composite structures utilizing spunbond nonwovens are one of the many configurations possible. Lamination can be accomplished by point bonding with heated calenders, sonic bonding, heat sealing and spray adhesives.



  • Construction/roofing underlayment and housing wrap
  • Industrial