VI-20 Geomembrane

Benefits of VI-20 geomembrane

• VI-20 geomembrane combines the advantages of a spray-applied membrane with performance of a technically advanced geomembrane.
• 60 mil LIQUID BOOT® plus 20 mil VI-20 provides excellent resistance to punctures and tears.
• VI-20 EVOH barrier technology provides superior protection against diffusion of chemicals when compared to typical HDPE geomembranes.
• Major applications for EVOH:
  • Food packaging to extend shelf life of perishable food
  • Automotive fuel tanks to control emissions of hydrocarbons

How it does it

VI-20 geomembrane is a 7-layer co-extruded EVOH geomembrane made using high quality virgin-grade polyethylene and barrier resins to provide unmatched impact strength as well as superior resistance to VOC vapor transmission. EVOH technology has been shown to have VOC diffusion coefficients 20 times lower than an 80 mil HDPE geomembrane and serves as a highly resilient underslab and vertical wall barrier designed to restrict methane, radon and other harmful chemicals.

EVOH is a copolymer of polyethylene (extrudes easily and improves bonding) and polyvinyl alcohol and ethylene vinyl alcohol (provides gas barrier). Applications for EVOH originated in the manufacturing of automotive fuel systems to control emissions of hydrocarbons, whose use was mandated by the U.S. EPA and the CA Air Resources Board (CARB) to reduce VOC emissions.

Applications

Typical uses for VI-20 include installation under slab and on below grade vertical walls as a vapor barrier to minimize vapor and nuisance water (non-hydrostatic conditions) migration into buildings. It is also ideal for application with chlorinated solvents, BTEX, and other PAHs.