CARTMAN 20x30 ft 12 Mil Heavy Duty Poly Tarp - Extra Thick Protection

In this review of the CARTMAN 20x30 ft 12 Mil Heavy Duty Poly Tarp the bottom line is clear: this tarp is aimed at homeowners, contractors and outdoor gear owners who need a heavy, finished-size cover that resists sun and water. The single biggest reason to buy is its 12 mil thickness combined with finished sizing and reinforced hems, which delivers a sturdier, more secure cover than typical thin tarps. The review finds it a dependable option for seasonal storage, jobsite shielding and general multipurpose protection.

Key Features

• 12 mil thickness: The extra-thick material gives improved puncture and tear resistance for heavier duty use around the house or on the job.
• Finished size: The tarp is cut to the exact size ordered so buyers receive a true 20x30 ft cover rather than a noticeably smaller piece.
• 100% virgin polyethylene: Using non-recycled polymer improves material integrity so the tarp resists rot and degrades less quickly than mixed-material alternatives.
• Aluminum grommets every 18 in: Evenly spaced grommets make it easier to secure and tension the tarp for stable coverage in wind and rain.
• Reinforced hem with poly rope: A sewn-in rope in the hem increases tear resistance at attachment points for longer usable life.
• UV and shrink-proof treatment: Sun protection and shrink resistance extend the tarp's outdoor lifespan compared with untreated covers.

Who It's For

This tarp fits homeowners who need reliable seasonal protection for firewood, patio furniture, trailers, or stacked building materials, and for small contractors who want an affordable heavy-duty cover on job sites. Its finished 20x30 ft dimensions and robust construction suit uses where a true large footprint and secure tie-down are important.

Those seeking a lightweight, packable shelter tarp for backpacking or ultralight camping should look elsewhere, as this 12 mil product is designed for durability and coverage rather than minimal weight or compactness.

Pros & Cons

Pros

• Thick 12 mil material offers solid protection against punctures and heavy weather.
• Finished exact sizing reduces surprises at installation and ensures planned coverage.
• Reinforced hems and grommet spacing help keep the tarp secure under tension.
• UV treated and shrink-proof surface increases outdoor longevity.

Cons

• Some buyers report mixed long-term durability, with occasional rips after extended outdoor exposure.
• Heavier construction makes it less convenient to carry or fold for frequent transport.

Specifications

Brand	CARTMAN
Finished size	20 x 30 ft
Material thickness	12 mil
Material	100% virgin polyethylene
Grommet spacing	Every 18 in
Edge reinforcement	Poly rope sewn into hem
Weather treatments	UV treated and shrink-proof

Our Verdict

The CARTMAN 20x30 ft 12 mil tarp is a practical, value-minded choice for anyone needing a large, heavy-duty protective cover. It delivers clear advantages in thickness, finished sizing and reinforced edges, making it well suited to storage, construction and outdoor protection tasks where durability and secure tie-down points matter.

Frequently Asked Questions

Is this tarp waterproof?
The tarp is waterproof and designed to shed rain and snow for typical outdoor storage and coverage needs.

Will the listed size be accurate?
Yes, the product is sold as a finished size so the tarp is cut to the advertised 20x30 ft dimensions rather than being undersized.

How often do grommets fail?
Grommets are aluminum and spaced every 18 in; proper tie-down techniques and tensioning reduce the chance of pull-through, though heavy abrasion at a few points can shorten life.