Black Tarps Heavy Duty Waterproof 20x30 - 12 Mil Thick Durable Tarp

In this review of the Black Tarps Heavy Duty Waterproof 20x30 tarp, the bottom line is simple: it is a straightforward, heavy-duty cover for outdoor protection when you need thick, waterproof material and reinforced attachment points. The tarp is aimed at homeowners, campers, and DIYers who want a durable plastic cover for equipment, roofs, boats, or temporary shelters. The single biggest reason to consider this tarp is its 12 mil thickness combined with heat sealed seams and anti-rust grommets, which provide tangible resistance to water and wear compared with thin, economy tarps.

Key Features

• 12 mil thickness: The 12 mil vinyl-like density provides a thicker barrier that helps block water and holds up better against regular outdoor use than lighter tarps.
• 100% virgin polyethylene: Using virgin material improves tear resistance and reduces any plastic odor often found in lower-grade tarps.
• Heat sealed seams: Seams are heat sealed to minimize water ingress along joins, improving overall waterproof performance.
• Anti-rust grommets every 20 in: Metal grommets placed at regular intervals make it easier to secure the tarp and resist corrosion in wet conditions.
• All-weather protection: The tarp offers waterproofing and UV resistance for typical outdoor exposures, aiding long-term outdoor coverage.

Who It's For

The tarp is best for homeowners covering patio furniture, sheds, or firewood, campers needing a thick shelter or ground cover, and tradespeople who require a heavy sheet to protect materials from rain and sun. Its 12 mil construction and regular grommets make it practical when durability and easy tie-downs matter.

Those who need a perfect, exact fit for a critical application or require reinforced corners and stitched hems for extreme wind loads should consider a purpose-built tarp with extra corner reinforcements, since a few users reported grommets or seams struggling under high stress or incorrect mounting methods.

Pros & Cons

Pros

• Thick 12 mil material provides noticeably better waterproofing and heft than thin tarps.
• Virgin polyethylene construction reduces unpleasant odors and improves tear resistance.
• Heat sealed seams and anti-rust grommets every 20 in make securing simple and increase longevity in wet conditions.

Cons

• Some customers reported instances of grommets ripping out or seams failing under heavy strain, so reinforcement may be needed for extreme loads.
• Size reports are mixed; a few buyers found the dimensions not exactly as expected, so measure and allow for some variance.

Specifications

Material	100% virgin polyethylene
Thickness	12 mil
Weight indicator	180 grams per square meter
Weave count	1414 weave
Grommet spacing	Every 20 in with anti-rust metal grommets
Seams	Heat sealed seams
Size	20 x 30 ft

Our Verdict

The Black Tarps Heavy Duty Waterproof 20x30 tarp is a solid value for general outdoor protection thanks to its 12 mil thickness, virgin polyethylene construction, and heat sealed seams. It suits homeowners, campers, and workers who need reliable, all-weather coverage, though those requiring extreme load-bearing attachment points should reinforce grommets or seams. Overall it offers dependable waterproofing and durability for routine outdoor jobs.

Frequently Asked Questions

Is this tarp truly waterproof?
The tarp uses heat sealed seams and polyethylene material to provide waterproof performance suitable for covering equipment and temporary shelters.

How often are the grommets placed?
Metal anti-rust grommets are placed every 20 in to allow secure tie-downs at regular intervals.

Will the tarp smell of plastic?
Made from 100% virgin polyethylene, the tarp is designed to avoid the strong plastic odor common to lower-grade tarps.