GUARD SHIELD Blue Tarp Waterproof 20x40 ft 7mil Medium Duty

In this review of the GUARD SHIELD Blue Tarp 20x40 ft, the bottom line is clear: it is a straightforward, budget-minded weather cover for general outdoor protection. The tarp's single biggest reason to buy is its practical, waterproof construction that is large enough to serve as a groundsheet, tent footprint, truck bed cover or emergency roof patch. The review looks at durability, hardware, and everyday usefulness to help decide if this 7mil medium duty tarp matches a typical homeowner or camper's needs.

Key Features

• 7mil Medium Duty Construction: The thickness gives a balance of flexibility and strength for general-purpose outdoor protection without being overly heavy.
• Woven and Coated Polyethylene: The coated weave repels water and dirt, making the tarp washable and simple to clean after use.
• Heat Sealed Seams with Rope Hem: Seams are sealed and reinforced with rope in the hem to resist seam separation when tensioned.
• Rustproof Aluminum Grommets Every 3 ft: Grommets placed at 3 ft intervals make it easy to secure the tarp to frames, tents, or vehicles with tie-downs.
• Portable and Reusable: The tarp folds down for transport and storage, so it can be reused season after season for shelter or cover tasks.

Who It's For

The tarp is a sensible choice for homeowners, campers, and DIYers who need an affordable, waterproof cover for short- to medium-term projects: protecting patio furniture, covering a pool, lining a truck bed, or creating emergency shelter. Its size and grommet spacing also make it useful for campers who want a tarp for shade or a tent footprint.

Those seeking heavy industrial strength or long-term UV-stable roofing should look elsewhere; some users report stress at corners or eyelets under extreme or long-term loads, so this product is best for general-purpose and seasonal uses rather than permanent installations.

Pros & Cons

Pros

• Waterproof material keeps items dry even in heavy rain when properly secured.
• Good value for money compared with heavier specialty tarps, covering a lot of area at low cost.
• Aluminum grommets and rope-reinforced hem make securing the tarp straightforward and practical.
• Portable and washable for repeated use in a variety of outdoor roles.

Cons

• Material strength is mixed in customer feedback, with some reports of tearing at corners or eyelets under stress.
• As a medium duty 7mil tarp, it is not intended for permanent roofing or heavy industrial use.

Specifications

Size	20 ft x 40 ft
Thickness	7mil medium duty
Material	Woven and coated polyethylene
Seams	Heat sealed with rope in hem
Grommets	Rustproof aluminum grommets every 3 ft
Use	Portable, washable, durable, reusable cover

Our Verdict

The GUARD SHIELD Blue Tarp 20x40 ft is a practical, value-oriented choice for homeowners and campers who need a large, waterproof cover for seasonal use. Its 7mil construction, sealed seams and spaced grommets deliver reliable protection for tents, pools, vehicles and temporary shelters, but those needing heavy-duty, long-term roofing should consider a thicker industrial tarp.

Frequently Asked Questions

Is this tarp fully waterproof?
Yes, the woven and coated polyethylene with heat sealed seams provides waterproof protection when properly secured.

How often are grommets placed?
Rustproof aluminum grommets are spaced every 3 ft along the hem for tie-downs.

Can this be used as a permanent roof?
It is best suited for temporary or seasonal coverage; long-term or permanent roofing requires heavier-duty materials.