White Tarps Heavy Duty 20 MIL - Made in USA

Our Heavy Duty White Tarps are made in the USA from 20 mil woven reinforced polyethylene — the heaviest poly tarp we offer and the top of our poly lineup. They are waterproof, highly UV-resistant, and built with outstanding cold-crack resistance, so they stay flexible and tough through cold winters instead of going brittle. Finished with heavy-duty solid brass grommets approximately every 2 ft on all four sides, they are made for long-term outdoor cover that holds up season after season.

What Is a 20 mil White Tarp?

A 20 mil white tarp is a thick, heavy-duty polyethylene tarp measuring a true 20 mil — roughly double the thickness of a standard 10 mil heavy-duty tarp. The extra material and cold-crack resistance make it the premium choice for demanding, long-term, and cold-weather use, where a thinner tarp would wear out or crack. The clean white color also keeps the space underneath brighter than dark tarps.

Quick Specifications

Origin: Made in USA
Material: Woven reinforced polyethylene (poly)
Thickness: 20 mil (true, measured — our heaviest poly)
Cold-weather performance: Outstanding cold-crack resistance for winter use
UV protection: High UV resistance
Performance: Waterproof, mildew & rot resistant
Color: White
Grommets: Heavy-duty solid brass, approximately every 2 ft on all 4 sides
Sizes: 6′ × 8′ through 100′ × 100′ (37 options, incl. 60′ × 120′)
Note: Listed dimensions are cut size; finished size is up to 6 in (3–5%) smaller

Best Uses

Canopy & carport covers — durable, bright white replacement tops sized for standard frames
Winter building enclosures — cold-crack resistance keeps the tarp flexible in freezing weather
Long-term roof & structure cover — the heaviest poly for extended outdoor protection
Equipment, machinery & material covers — heavy-duty protection on the jobsite or farm
Wind-break & curtain walls — large-format sizes for big enclosures

How It Compares

This is the heaviest tier in our poly tarp family. Step up to 20 mil USA for maximum durability and winter performance, or choose a lighter tier to save cost or pass more light:

Tarp	True thickness	Origin	Best for
Heavy Duty White Tarps 20 mil (this collection)	20 mil (heaviest)	Made in USA	Premium canopy/carport + cold-crack winter enclosures
Silver/White Tarps – Made in USA	12 mil	Made in USA	Reversible reflective/light-passing canopy & carport
Heavy Duty White Tarps	10 mil	Imported	Light-passing carport & canopy at an economical price

Want a different thickness or color? Compare the full range from 5 mil to 20 mil on the Poly Tarps hub.

Need a Custom White Tarp?

MyTarp.com makes custom tarps in the USA. If you don’t see the size you need, call us at (404) 800-8888 and we’ll build it to your dimensions. Located in metro Atlanta with fast shipping across the Eastern and Midwest states.

Frequently Asked Questions

What is a 20 mil white tarp, and how heavy duty is it?

A 20 mil white tarp is a thick, heavy-duty polyethylene tarp measuring a true 20 mil, which is roughly double the thickness of a standard 10 mil heavy-duty tarp. It is the heaviest poly tarp we offer, made from woven reinforced polyethylene for long-term, demanding outdoor cover.

Why is this the heaviest poly tarp you offer?

At 20 mil it sits at the top of our poly ladder, above our 10-12 mil heavy-duty tarps. The extra material means more durability, longer outdoor life, and better resistance to wind and wear, which is why it is our premium poly choice.

Are these good for winter and cold weather?

Yes. These tarps have outstanding cold-crack resistance, so they stay flexible and tough in freezing temperatures instead of becoming brittle and cracking. That makes them a strong choice for winter building enclosures and cold-weather outdoor cover.

20 mil USA white vs 10 mil imported white vs 12 mil silver/white - which should I choose?

Choose the 20 mil Made-in-USA white for maximum durability and cold-weather performance. Choose the 12 mil Silver/White Made-in-USA for a reversible reflective or light-passing face. Choose the 10 mil imported Heavy Duty White for a lighter, more economical light-passing cover. In short: 20 mil is the heaviest and toughest, 10 mil is the budget option.

Are 20 mil white tarps waterproof and UV-resistant?

Yes. They are waterproof and have high UV resistance for long life in the sun, and they are also mildew and rot resistant.

What grommets do they have, and how far apart?

They have heavy-duty solid brass grommets spaced approximately every 2 ft on all four sides for secure, durable tie-downs.

What is the difference between cut size and finished size?

The listed dimensions are the cut size of the material before finishing. After hemming and grommeting, the finished tarp is up to 6 inches (about 3 to 5 percent) smaller. If you need to cover an exact area, size up accordingly.

Can I get a custom size, and what sizes are available?

This collection offers 37 sizes, from 6 ft x 8 ft up to 100 ft x 100 ft, including 60 ft x 120 ft. We also make custom tarps in the USA. If you do not see the size you need, call us at (404) 800-8888 and we will build it to your dimensions.