9 ft x 20 ft Blue Waterproof Shade Sail Rectangle - Strong UV

In this review the ShadeMart 9' x 20' Blue Waterproof Shade Sail is evaluated as a practical, no-frills canopy for patios, carports and small backyard areas; its biggest selling point is reliable sun and light rain protection paired with straightforward installation. The sail is made from polyester with a PU waterproof coating, offers up to 95% UV blockage, and lowers surface temperatures noticeably, so anyone wanting a cost-effective way to cool outdoor space will find it useful.

Key Features

• Waterproof coating: The PU finish prevents wind-driven spray and light rain from passing through so the area beneath stays drier than with standard fabric sails.
• High UV protection: Blocks up to 95% of harmful UV rays, helping reduce sun exposure and lowering surface temperatures by up to 15 degrees compared with no shade.
• Reinforced edges: Dual-layer white webbing under the fabric and curved edges reduce the chance of tearing at stress points and add durability.
• Stainless steel corners: D rings are attached to reinforced corners for secure anchoring and long-lasting connection points.
• Custom size option: ShadeMart offers customization and typically prepares custom orders within two business days, which suits awkward or nonstandard spaces.
• Easy install guidance: Designed to be tensioned tightly during setup to avoid sagging and water pooling, making maintenance straightforward.

Who It's For

The sail is aimed at homeowners and renters who need an affordable canopy for a patio or carport, want quick temporary or seasonal shelter, and appreciate a fabric that sheds light rain while cutting sunlight. It works well for people who value simple hardware-free fabric and who will anchor it to existing posts, walls or a dedicated frame.

Those who need a permanent, fully waterproof roof or plan to leave the sail up through heavy storms should look elsewhere; the sail withstands light rain but can be damaged by water accumulation or high winds, so it is best for fair-weather coverage and occasional wet conditions.

Pros & Cons

Pros

• Strong, reinforced stitching and corner loops improve longevity and feel like good build quality.
• Effective at shading and lowering temperature, delivering tangible temperature reduction on patios.
• Relatively easy to install when using proper tension and hardware, offering solid value for money.

Cons

• Not designed for heavy storms; users must prevent water pooling to avoid tearing or sagging.
• Size and color perceptions vary for some buyers, so verify custom dimensions carefully before ordering.

Specifications

Our Verdict

The ShadeMart 9' x 20' waterproof shade sail is a sensible, budget-friendly option for anyone wanting strong sun protection and light rain resistance on a patio, carport or backyard. It delivers solid functionality with reinforced construction and easy installation when paired with proper hardware, making it a good value for seasonal outdoor shade if you avoid leaving it up in severe weather.

Frequently Asked Questions

Is the sail fully waterproof?
It has a PU waterproof coating that withstands light rain but is not intended as a permanent roof during heavy storms or when water can pool.

Does the package include installation hardware?
Installation kit is not included; the manufacturer recommends using ShadeMart hardware kits or equivalent anchors for best results.

Can I order a different size?
Yes, custom sizes are available and typically take about two business days to prepare.