RAINDEWAY 20x40 ft 18 Mil Super Heavy Duty Brown Tarp - Weatherproof

In this review of the RAINDEWAY 20x40 ft tarp the bottom line is simple: this is a heavy, no-nonsense cover for outdoor protection when durability matters most. The reviewer found it best suited to users who need a rugged, long-lasting sheet for protecting equipment, vehicles, or construction materials because the 18 mil thickness and tightly woven 16 x 16 weave create a noticeably dense, weighty fabric. The tarp arrives with reinforced edges and metal grommets spaced about 18 in apart, which makes securing large loads or spanning a roof edge straightforward and reliable.

Key Features

• 18 Mil Super Heavy Duty: The thick 18 mil construction and average weight of 9.2 oz/sq yard give the tarp strong tear resistance for demanding outdoor use.
• Tightly Woven 16 x 16 Weave: The closely woven polyethylene fibers improve durability and help maintain waterproof performance over time.
• Metal Grommets and Reinforced Edges: Heavy-duty metal grommets spaced about 18 in apart and reinforced hems make tie-downs secure and reduce edge fraying.
• UV Resistant and Weatherproof: Built-in UV resistance helps limit sun damage and fading while providing protection from rain, wind, and dirt.
• Finished Full Size: The listed 20 ft x 40 ft finished size is usable as stated, suitable for covering a truck bed, roof section, boat, or stacked materials.
• Multipurpose Use: The brown tarp can be used for construction, camping shelters, pool covers, and general outdoor storage due to its weatherproof design.

Who It's For

The tarp is aimed at homeowners, contractors, landscapers, and anyone needing a substantial, reusable cover to protect gear from sun and wet weather. Its heavy weight and reinforced grommets make it a good match for semi-permanent covers and transport use where wind and movement are expected.

Those who should look elsewhere include buyers who need an ultra-lightweight or packable tarp for backpacking or minimalist camping, or anyone wanting decorative colors or transparent material. Also, customers sensitive to exact sizing should measure carefully, as some users find the full-size finished dimensions larger than expected.

Pros & Cons

Pros

• Very durable 18 mil material provides strong tear and abrasion resistance.
• Reinforced edges with metal grommets make it straightforward to secure and lash down.
• UV resistant and waterproof properties protect items from sun and rain.
• Good value for the weight and thickness compared with lighter tarps.

Cons

• The tarp is heavy and bulky to handle, which can be awkward for a single person to spread or fold.
• Size perception varies among buyers; some report it feels larger than expected for certain uses.

Specifications

Brand	RAINDEWAY
Finished Size	20 ft x 40 ft
Material Thickness	18 mil
Weight	Approx. 9.2 oz/sq yard
Weave	16 x 16 tightly woven polyethylene
Grommet Spacing	About 18 in apart
Color	Brown

Our Verdict

The RAINDEWAY 20x40 ft 18 mil tarp is recommended for anyone who needs a robust, weatherproof cover that stands up to sun and rough conditions. It delivers durable construction, practical grommet placement, and clear finished sizing, making it a solid value for outdoor storage, job sites, and heavy-duty covering tasks, though it is bulky to handle for one person.

Frequently Asked Questions

Is this tarp waterproof?
Yes, the tightly woven polyethylene and coating provide a waterproof barrier suitable for rain protection.

How are the grommets spaced?
The metal grommets are spaced about 18 in apart along reinforced edges for secure tie-downs.

Will it resist sun damage?
The tarp includes UV resistant treatment to reduce fading and degradation from sun exposure.