Although Klerks is recognized as the leader in long life additive film technology, did you know that we also pioneered many advances for the nursery film user as well? RKW Klerks was the first company to use tri-layer technology for one year and overwinter films. We start with top quality resins that produce great tensile strength, but we don’t just stop there. We offer a veriety of choices for overwinter film users. Film is available in 3, 4, 5, and 6 mil. Clear film as well as white opacities of 35%, 55%, and 70% are also available. Widths from 4’ up to 60’ are available.

Designed specifically for dutch houses venlo style houses. EVA resins produce a 4 year, 4 mil film that is super clear. Available in 14.4’ and 15.4' sheets and tubes, and 28.8’ sheets. Has Klerks patented AC additive.

K50 Clear

A 4 year, 6 mil covering for single or double layer applications. Starting with strong EVA resin for excellent durability and light transmission, it comes standard with an anti-static additive to repel dust and dirt and keep the light shining through. Klerk’s UV protection uses the latest HALs technology for superior film life. Tri-layer construction gives maximum physical properties with less weight. Available in Clear or 55% White, sheet or tubes.


Keep the heat and lose the drips! Klerks sets the standard in the industry for long lasting anti-condensation, the standard to which all other companies compare. All anti-condensates work when they’re new, but no other film’s anti-condensate additive keeps on working for you after that first or second year like Klerks does.

  • Anti-condensation - Removes the condensation from the film surface by providing an industrial soap additive. That keeps the films surface tension low where droplets will not form. Water will spread out and “sheet” to the gutters.
  • Infra-Red - This film helps conserve energy by holding longer IR wavelengths in the house at night. This keeps the heaters from cycling as often and saves on energy. Has one of the highest thermal ratings of any film in the industry.
  • Diffusion – breaks up the light and spreads it around your greenhouse. Gives your plant even, cool light that can reach below the canopy.

KoolLite Plus

  • New advanced technology allows higher light transmission (84% PAR) plus the same great daytime heat reduction that growers have depended on with KoolLite 380. KoolLite Plus will typically lower greenhouse air temperature by 10 degrees compared to tradtional greenhouse films. Cooler temperatures lengthen daytime growing periods during hot weather and decrease crop production times.
  • Special IR addivites absorb and re-radiate nighttime infrared heat back down to the crop saving up to 15% on nighttime heating costs.
  • Reduced water droplet formation - Grower proven longest lasting 2 sided anti-condensate control in the industry
  • High light diffusion (53% of transmitted light per layer) means uniform plant growth and crop dry down times
  • Reduces the need for greenhouse shading while providing improved PAR light transmission
  • Ultraviolet light stabilized for long life outdoor exposure
  • Bee friendly film

Designed for the northern latitudes where ice sheets become extreemly heavy and abrasive, or anywhere extra structural strength is needed.

  • Hyticlear – Clear, with anti-dust additive.
  • Hytithermic – has a thermal additive that retards IR wavelengths, holding heat in your greenhouse at nights better.
  • Hytilux – has the patented Klerks ac technology and IR additive.