20ft x 30ft Brown Super Ultra Heavy-Duty Tarp 20 Mil - Waterproof

In this review the 20' x 30' Brown Super Ultra Heavy-Duty Tarp is presented as a heavy-use protective cover for people who need a reliable all-weather barrier. The bottom line: it is best for homeowners, contractors, and outdoor gear owners who prioritize a thick, waterproof sheet with reinforced edges and frequent grommet spacing. The reviewer found the tarp's single biggest selling point is its 20 mil thickness combined with a tight 16x16 weave, which delivers noticeable weight and water resistance compared with thinner covers.

Key Features

• 20 mil thickness: Provides a dense, heavy-duty layer that resists punctures and holds up under wet conditions for extended coverage.
• 100% waterproof: The polyethylene construction blocks moisture and condensation, keeping equipment, firewood, and vehicles dry.
• 16x16 weave: Tight weaving improves tear resistance and overall durability during demanding outdoor use.
• Reinforced corners and perimeter rope: Border piping and a sewn-in rope reduce stress at tie points and help prevent tearing when secured.
• Aluminum grommets every 2 ft: Frequent, rust-resistant anchor points make securing large loads and odd shapes much easier and more stable.
• UV resistant: Built to resist sun damage so it maintains performance in prolonged outdoor exposure.

Who It's For

This tarp is ideal for homeowners protecting outdoor furniture, campers covering tents, and contractors needing a robust weatherproof cover on job sites. Its size and build make it suitable for truck beds, boats, RVs, and pallets where a heavy, waterproof barrier is required.

It is less suitable for very long-term stationary installations where professional-grade, coated fabrics or custom-fitted covers are preferred, and buyers who need an ultra-light or compact tarp for backpacking should look for a lighter, more packable option.

Pros & Cons

Pros

• Very thick 20 mil construction that feels substantial and blocks water effectively.
• Reinforced corners, sewn perimeter rope, and grommets every 2 ft provide solid tie-down durability.
• Tight 16x16 weave and UV protection enhance longevity in outdoor conditions.
• Large 20' x 30' size covers big loads and multiple applications without seams.

Cons

• Mixed user reports on long-term durability mean some units may degrade faster than expected under extreme or continuous stress.
• At 20 mil and large size, it is heavy and less convenient to fold or store compared with lighter tarps.

Specifications

Size	20' x 30' (ft)
Thickness	20 mil
Material	100% polyethylene with 16x16 weave
Grommet Spacing	Every 2 ft, aluminum
Edge Reinforcement	Border piping with heavy-duty rope sewn around perimeter
Weather Protection	100% waterproof and UV resistant

Our Verdict

The 20' x 30' 20 mil tarp is a solid choice for anyone needing heavy-duty, waterproof coverage at a reasonable value. Its thick polyethylene, reinforced edges, and frequent grommets make it especially useful for seasonal protection and demanding outdoor uses, though buyers should be aware that a few users reported shorter lifespans under severe conditions. Overall, it performs well for most household and job-site needs.

Frequently Asked Questions

Is this tarp fully waterproof?
Yes. The tarp is made from 100% polyethylene and is described as fully waterproof to keep moisture and condensation away.

How often are the grommets placed?
Aluminum grommets are spaced every 2 ft around the perimeter to allow secure tie-downs.

Will it resist sun damage?
It includes UV protection to reduce sun degradation, improving outdoor longevity compared with untreated tarps.