20 x 40 White 20 Mil Tarp Cover - Extreme Heavy Duty Waterproof

Our review of the 20 x 40 White 20 Mil Tarp Cover finds it best suited for homeowners and contractors who need a heavy, reliable protective sheet for roofs, boats, or seasonal storage; the single biggest reason to buy is its robust construction made from 100% virgin polyethylene, which delivers tear resistance and weather protection where thinner, recycled tarps fail. This review covers how the finished sizing, reinforced edges and frequent metal grommets contribute to long-term use rather than being a short-term fix.

Key Features

• Finished size: Delivered at the full 20 x 40 finished dimensions so customers get the exact coverage they order without unexpected shrinkage.
• 100% virgin polyethylene: Uses non-recycled material for improved strength and resistance to tearing, rot, and premature degradation.
• Reinforced edges and grommets: Metal grommets every 18 in and reinforced hems provide reliable anchor points for bungee cords or rope and reduce edge fraying under tension.
• 16 x 16 weave count: A dense weave gives the tarp added durability and weight for stability in wind and winter conditions.
• Weatherproof protection: Waterproof and UV resistant treatment helps shield objects from sun damage, rain, and snow year-round.

Who It's For

The 20 x 40 White 20 Mil tarp is ideal for homeowners covering a shed roof, contractors needing a temporary protective cover, and outdoor enthusiasts who want a durable canopy or groundsheet that withstands wind and UV exposure. Its heavy weight and reinforced edges suit semi-permanent outdoor use where a flimsy tarp would quickly fail.

It is less appropriate for users who need a very lightweight packable tarp for backpacking or for decorative patio covers where appearance and breathability matter more than rugged protection. If frequent folding into a small pack is required, a lighter tarp material would be better.

Pros & Cons

Pros

• Heavy construction and virgin polyethylene make it durable against tears and rot.
• Grommets every 18 in and reinforced edges simplify secure tie-downs and reduce stress on corners.
• Finished sizing delivers reliable coverage without the surprise of undersized sheets.
• Waterproof and UV resistant for year-round outdoor protection.

Cons

• The tarp's thickness and weight make it bulky to store and less suited for ultralight or backpacking use.
• There may be slight variation in thickness between batches, as noted by the manufacturer.

Specifications

Our Verdict

The 20 x 40 White 20 Mil Tarp Cover is a practical choice for anyone needing a heavy-duty, weatherproof cover that holds up to wind, sun and winter conditions. Its finished sizing, reinforced edges, and frequent metal grommets deliver dependable protection and good value for projects where longevity matters more than light weight.

Frequently Asked Questions

Is this tarp waterproof?
Yes, the tarp is advertised as waterproof and weatherproof to protect against rain and snow.

How often are grommets placed?
Metal grommets are placed every 18 in along reinforced edges to provide multiple secure tie-down points.

Will the size be the full 20 x 40?
Yes, sizes are finished size so you receive the full 20 x 40 coverage rather than a smaller cut.