12x20 Heavy Duty Tarp 10 Mil Thick - Waterproof, UV Treated

In this review the focus is a heavy duty 12 x 20 ft tarp that aims to protect gear without fuss. The bottom line: this tarp is best for people who need a thicker, worksite-grade cover rather than a light camping sheet. Its single biggest selling point is the 10 mil double-laminated construction combined with metal grommets every 18 in and capped reinforced corners, which together give real confidence when securing it in wind or over bulky loads.

Key Features

• 10 mil thickness: The heavier material provides increased puncture and tear resistance compared with thin camping tarps, making it better for tough outdoor jobs.
• Double lamination: Two layers of material add durability and help the tarp hold up under repeated use and abrasive contact.
• Metal grommets every 18 in: Frequent tie points make it easy to lash the tarp down securely and distribute tension to reduce stress on any single point.
• Capped reinforced corners and rope-reinforced hems: Reinforcement at stress points prevents early fraying and helps the tarp survive heavy use and high winds.
• Waterproof and UV treated: The tarp sheds water and resists sun fade so it can be used season after season for outdoor storage and shelter.

Who It's For

This tarp suits homeowners, contractors, and outdoor hobbyists who need a reliable cover for firewood, equipment, vehicle loads, or temporary shelter where a more durable material is required. It works well for protecting stacked lumber, covering a barbecue or small boat, and as a groundsheet or tent footprint when added ruggedness matters.

Those who should look elsewhere include buyers who need a very wide or custom-sized tarp - some customers noted fit can vary with advertised dimensions - and anyone who prefers an ultralight tarp for backpacking or minimalist camping, where weight and pack size are critical.

Pros & Cons

Pros

• Sturdy 10 mil construction and double lamination deliver clear protection from punctures and tears in demanding conditions.
• Frequent metal grommets and reinforced hems make securing this tarp straightforward and reliable.
• Waterproof and UV treated finish preserves contents and reduces fading for longer outdoor life.

Cons

• Size perceptions vary: a few users reported the tarp did not match expected width in a couple of cases, so check fit for specific applications.
• Heavier construction means more weight and bulk compared with lightweight camping tarps, limiting backpacking use.

Specifications

Brand	KING-A-MA-JIGS
Finish size	12 x 20 ft
Thickness	10 mil
Grommet spacing	Metal grommets every 18 in
Corners and hems	Capped reinforced corners and rope-reinforced hems
Construction	Double lamination, reversible silver/brown sides
Weather protection	Waterproof and UV treated

Our Verdict

The 12 x 20 ft, 10 mil tarp is a practical choice for anyone who needs a rugged, waterproof cover that will last through regular outdoor use. Its reinforced corners, frequent grommets, and heavier material make it good value for protecting equipment, firewood, and worksite supplies, though those needing ultralight or guaranteed exact-width gear should verify fit first.

Frequently Asked Questions

Is this tarp waterproof?
Yes, the tarp is described as waterproof and its double-laminated finish helps keep water out.

How often are the grommets placed?
Metal grommets are spaced every 18 in to provide frequent tie-down points for secure fastening.

Can it resist sun damage?
Yes, the tarp is UV treated to resist fading and degradation from sun exposure.