Warp's Poly-Cover Construction & Agriculture Film - 4mil - 20ft x 100ft - Clear

Heavier-Duty Clear Barrier Film for Demanding Construction Work, 20ft x 100ft

Standard-weight sheeting isn't always tough enough for demanding construction or agricultural jobs that put more stress on a plastic barrier. Warp's Poly-Cover Construction & Agriculture Film is seamless, full-weight polyethylene rated to ASTM D-4397 and built to NBS PS17-69 and Handbooks 130 and 133, and this 4mil clear version steps up to a heavier-duty gauge while still letting light pass through.

At 20ft x 100ft, this wider roll covers broad heavy-duty runs in a single pass, cutting down on overlapping seams for larger jobs.

Key Features & Benefits

• Heavier-Duty 4mil Gauge — built for more demanding construction and agricultural work than a general-purpose 2mil film.
• Continuous Full-Weight Construction — produced in one unbroken run instead of a seamed or patched film that can develop weak spots.
• Clear, Light-Transmitting Finish — lets light pass through while still functioning as a robust vapor and moisture barrier.
• ASTM D-4397 Rated — satisfies ASTM D-4397 along with NBS PS17-69 and Handbooks 130 and 133 for polyethylene construction film.
• Made in the USA — produced domestically by Warp Bros. rather than sourced overseas.

Who Should Use This Film

This heavier gauge suits contractors and agricultural operators who need a more robust barrier than a general-purpose film provides — for demanding concrete curing jobs, extended temporary covers, or protection needs that a lighter film can't handle — while still allowing some light transmission.

About Warp Bros

Warp Bros. traces back to 1924, when Harold Warp started the company in Chicago on the strength of an early plastic glazing patent. Over a century later, the company still manufactures its polyethylene sheeting in the United States, at facilities in Chicago and Dixon, Illinois.

Frequently Asked Questions

How does the 4mil clear gauge compare to lighter films?

At 4mil, this is a heavier-duty thickness designed for demanding construction and agricultural work that calls for a more robust barrier than a general-purpose gauge provides. It stands up to more handling stress and extended exposure than Warp's lighter films.

Is this film independently rated for construction use?

Yes. This sheeting satisfies ASTM D-4397 along with NBS PS17-69 and Handbooks 130 and 133, the specifications commonly required for professional construction and agricultural sheeting.

Why choose clear film instead of black at this thickness?

The clear finish lets light through while still providing a strong moisture and vapor barrier, which suits concrete curing and temporary protective covers where blocking light isn't the point. Choose Warp's black film instead when light exclusion, such as for weed suppression, is the priority.

Can this heavier film be used in greenhouse settings?

Yes, growers use this heavier-gauge film as a ground cover, floor liner, or vapor barrier where extra durability matters. Its ASTM-rated polyethylene construction holds up well to repeated use in controlled growing facilities.