Core Tarps Extreme Heavy Duty 20 Mil Tarp Cover Silver/Black 12 x 20

In this review of the Core Tarps Extreme Heavy Duty 20 Mil tarp (Silver/Black 12 x 20) the bottom line is simple: this is a heavy, weatherproof tarp built for protective outdoor use where thickness and finished sizing matter. The reviewer found it most useful for roof patches, boat covers and long-term outdoor storage because the manufacturer uses 100% virgin polyethylene and delivers the full finished size instead of a slightly smaller tarp. Durability and reliable coverage are the single biggest reasons to buy.

Key Features

• Finished Size: The tarp is sold at its stated finished dimensions so you get the full 12 x 20 size without losing inches on the edges, which makes planning coverage straightforward.
• 100% Virgin Polyethylene: Made from pure non-recycled material, the fabric feels substantially thicker and resists rot better than mixed-material tarps.
• Reinforced Edges: Heavy folded hems increase tear resistance at stress points so corners and sides hold up under tension.
• Metal Grommets Every 18 in: Metal grommets spaced at 18 in intervals allow secure tie-downs with rope or bungee cords and make mounting easier on irregular shapes.
• Weatherproof and UV Resistant: The tarp is designed to shed water and withstand sun exposure so it can be used seasonally for roof, patio, pool or camping protection.

Who It's For

This tarp is best for homeowners, contractors and outdoorspeople who need a heavy-duty protective cover for equipment, furniture, roofs, boats or seasonal storage. The finished sizing and weight make it practical for projects that require predictable coverage and abrasion resistance.

It is less suitable for ultralight backpacking or situations where a very compact, low-weight tarp is needed; users seeking a thin, emergency tarp or a specialized breathable cover should look elsewhere.

Pros & Cons

Pros

• Thick material and reinforced edges make it feel durable for heavy use.
• Finished sizing removes guesswork when measuring objects to cover.
• Metal grommets every 18 in provide reliable tie-down points for multiple configurations.
• Waterproof and UV resistant for all-season outdoor protection.

Cons

• Some users report occasional tearing under extreme strain, so highly abrasive or sharp-edged loads may still damage it.
• Weight and bulk are significant compared with lightweight tarps, making handling and storage less convenient.

Specifications

Brand	Core Tarps
Model Variant	Extreme Heavy Duty 20 Mil
Finished Size	12 x 20 ft
Material	100% virgin polyethylene
Grommet Spacing	Every 18 in with metal grommets
Weave Count	16 x 16
Features	Reinforced edges, UV resistant, waterproof

Our Verdict

The Core Tarps Extreme Heavy Duty 20 Mil Silver/Black 12 x 20 tarp is a solid, no-nonsense cover for users who need dependable, full-size protection. Its finished sizing, metal grommets and virgin polyethylene construction offer real value for roof patches, boat covers and outdoor storage, though the weight makes it better for planned projects than emergency ultralight use.

Frequently Asked Questions

Is this tarp waterproof?
Yes. The tarp is described as waterproof and weatherproof and will shed rain in typical outdoor conditions.

How are the grommets spaced?
Metal grommets are placed every 18 in along the reinforced edges for secure tie-down points.

Will it resist UV and rot?
It is UV resistant and made from non-recycled virgin polyethylene, which improves resistance to rot and sun degradation compared with mixed-material tarps.