20x20 Multi-Purpose White Heavy Duty Dry Top Poly Tarp - Full Size

In this review the 20x20 Multi-Purpose White Heavy Duty Dry Top Poly Tarp is judged as a straightforward, utilitarian cover for outdoor gear and work projects. The biggest reason to consider it is that it is a true finished size tarp, meaning you get the full 20 ft by 20 ft coverage claimed rather than a smaller cut size. That reliability in dimensions, combined with laminated polyethylene and reinforced corners, makes it a practical choice for homeowners, contractors, and RV owners who need predictable protection without paying for specialty fabrics.

Key Features

• Full finished size: Cut larger so the tarp finishes true to size within +/- 3%, giving reliable coverage for a full 20 ft x 20 ft area.
• Heavy duty material: Made from 5.5 oz per sq yd polyethylene with a 14 by 14 cross weave for a thicker, more tear-resistant sheet than lightweight tarps.
• Laminated both sides: Lamination on both faces improves waterproofing and helps the tarp shed water rather than soaking through after extended exposure.
• UV treated: UV treatment increases weather resistance, helping the tarp stand up to sun exposure longer than untreated poly sheeting.
• Reinforced perimeter: Rope-reinforced hem and industrial capped corners add strength at stress points, reducing the chance of edge fraying under load.
• Grommet spacing: Rust-resistant grommets at corners and about every 18 in around the edge provide frequent secure points for tie-downs.

Who It's For

This tarp is best for homeowners, landscapers, construction crews, and RV owners who need an economical, full-size cover for equipment, patio furniture, or temporary shelter. Its true finished dimensions are particularly useful when exact coverage matters, such as covering a specific RV roof or a square stack of lumber.

Shoppers who need long-term heavy industrial covers, flame-resistant fabrics, or specialized breathable tarps should look elsewhere; this product is a heavy-duty polyethylene tarp optimized for general weatherproofing rather than specialized performance in extreme industrial or fire-prone environments.

Pros & Cons

Pros

• True finished size provides predictable 20 ft x 20 ft coverage without unpleasant surprises in dimensions.
• Thicker 5.5 oz./sq yd laminated polyethylene and 14 x 14 cross weave feel durable and shed water well.
• Frequent rust-resistant grommets and rope-reinforced hem make tie-downs easier and reduce tear propagation.
• Good value for general outdoor protection over boats, patio sets, or RVs compared with single-use sheeting.

Cons

• Some customers report mixed long-term durability around grommet areas, so very heavy or prolonged stress can lead to tearing.
• Polyethylene construction is not a substitute for breathable or flame-retardant industrial covers when those features are required.

Specifications

Brand	Dry Top
Finished size	20 ft x 20 ft (true finished size +/- 3%)
Material weight	5.5 oz per sq yd
Weave	14 by 14 cross weave
Lamination	Laminated on both sides
Grommet spacing	Approx every 18 in around perimeter; industrial capped corners
Hem	Rope-reinforced perimeter hem

Our Verdict

The 20x20 Dry Top poly tarp is a sensible, budget-friendly choice for anyone needing reliable, full-size coverage and decent weather resistance. It delivers good build quality for general outdoor protection and is particularly useful when accurate dimensions matter; buyers who require specialty fabrics or extreme long-term durability at grommet points should consider higher-end options.

Frequently Asked Questions

Is this tarp really 20 ft x 20 ft?
Yes, the tarp is advertised as a finished size and is cut larger so it finishes true to the 20 ft by 20 ft dimensions within +/- 3%.

Will it resist sun and rain for seasonal outdoor use?
It is laminated on both sides and UV treated for improved weatherproofing, making it suitable for seasonal protection from sun and rain though prolonged UV exposure can still degrade polyethylene over many seasons.

Are the grommets durable for tie-downs?
Grommets are industrial capped and rust resistant with about 18 in spacing, but some users report grommet tearing under heavy or constant stress, so use proper tie-down techniques and avoid concentrated loads.