Blackout Poly Film White/Black, 40'x100'

This white-and-black blackout polyethylene film measures 40 by 100 feet and is approximately 5 mil thick. The layered agricultural film is intended for high-opacity applications such as photoperiod control, reflective greenhouse surfaces, silage covering, and stale-seedbed preparation. The white side reflects light and heat, while the black side limits light transmission.

• 40 by 100 feet roll
• White surface and black backing
• Approximately 5 mil thickness
• Multi-layer construction for outdoor agricultural use

The 40-foot width provides broad coverage for greenhouse or ground applications; confirm roll orientation before unrolling so the intended surface faces outward. Measure the structure or ground area before ordering and allow material for fastening and overlap. Support the film so wind cannot whip against sharp edges, use attachment hardware suited to polyethylene, and avoid excessive tension. Blackout performance depends on sealed seams and edges; inspect for punctures after storms or equipment movement. Keep folded film away from heat and flame, and store unused material dry and protected from rodents and sunlight.

Browse related materials in our Season Extension collection.