ShadeMart 13ft x 21ft Turquoise Rectangle Sun Shade Sail - UV Block

In this review the ShadeMart 13' x 21' Turquoise Sun Shade Sail Rectangle is evaluated for homeowners and small-business owners who need a durable, breathable canopy that cuts sun and heat without creating a waterproof roof. The biggest reason to consider this shade sail is its combination of woven HDPE fabric and stainless steel corner D rings, which delivers strong, long-lasting shade that blocks up to 95% of harmful UV while remaining water and air permeable. It is best for patios, carports, poolside equipment covers and other outdoor areas where airflow and UV protection matter.

Key Features

• Woven HDPE fabric: provides a lightweight but robust canopy that reduces temperatures by about 10 to 15 degrees and resists tearing under normal outdoor use.
• Stainless steel D rings: corner fittings on heavy duty white webbing give secure attachment points that hold up to repeated tension and weather exposure.
• Water and air permeable: the sail allows rain and airflow to pass through, preventing ponding while maintaining shade and ventilation beneath the canopy.
• High UV protection: blocks up to 95% of harmful UV rays to protect people and equipment from sun damage and reduce ambient heat.
• Custom size options: the brand offers custom sizing so the sail can be tailored to specific patios, pergolas or carports when standard sizes do not fit.
• Decorative rectangle styling: a simple rectangular shape and color choices let the sail integrate with existing outdoor design while providing practical shade.

Who It's For

The ShadeMart rectangle shade sail is well suited for homeowners who want an affordable, easy-to-install shading solution for patios, decks, pools, carports and outdoor equipment areas; it works particularly well where airflow and UV reduction are priorities rather than full waterproofing. It is also a practical option for small businesses that need temporary or semi-permanent shade over seating or walkways.

Those who should look elsewhere include buyers who need a fully waterproof canopy or a rigid, permanent roof replacement, and customers who prefer a custom-fitted structure provided and installed by a contractor rather than a fabric sail that requires accurate on-site measurements and hardware for mounting.

Pros & Cons

Pros

• High UV blocking and notable temperature reduction under the sail for more comfortable outdoor use.
• Durable construction with woven HDPE fabric and stainless steel corner D rings attached to heavy webbing.
• Water and air permeable design prevents water pooling and keeps airflow, making it suitable for many weather conditions.
• Good value for the price and easy to install with the proper hardware kit, according to customer experience.

Cons

• Not waterproof, so it will not provide full protection from heavy rain or serve as a substitute for a solid roof.
• Manual sizing can vary slightly in measurements, requiring careful measurement before ordering and adjustment during installation.

Specifications

Brand	ShadeMart
Shape	Rectangle
Size	13' x 21'
Material	Woven HDPE (High Density Polyethylene)
Corner Fittings	Stainless steel D rings on heavy duty white webbing
Functionality	Water and air permeable, blocks up to 95% UV
Customization	Custom sizes available; area remains constant despite manual measurement variation

Our Verdict

The ShadeMart 13' x 21' Turquoise Rectangle Sun Shade Sail is a sensible buy for anyone seeking a breathable, UV-blocking shade solution that is durable and easy to install with the right hardware. It delivers strong material quality and noticeable temperature reduction at a reasonable price, but it is not a replacement for a waterproof roof, so buyers should choose it when airflow and sun protection are the primary goals.

Frequently Asked Questions

Is this shade sail waterproof?
The fabric style is not waterproof; it is water permeable and allows rain to pass through to avoid ponding.

Will it reduce temperature under the canopy?
Yes, the woven HDPE fabric blocks sunlight and can lower temperatures under the sail by about 10 to 15 degrees in typical conditions.

Can it be attached to trees or poles?
Yes, with the proper hardware kits the sail can be attached to poles, trees, walls, roofs and other structures for a secure installation.