ShadeMart 17ft x 20ft Black Sun Shade Sail UPF50 Rectangle - Heavy

In this review of the ShadeMart 17' x 20' Black Sun Shade Sail, the bottom line is simple: it is a heavy duty, breathable rectangle canopy best suited for homeowners and RV owners who need reliable UV protection without trapping heat. The sail's woven HDPE fabric and stainless steel corner D rings deliver a sturdy feeling at installation, while the fabric's air permeable design blocks up to 95% of harmful UV rays and lowers shaded temperatures by around 10 to 15 degrees. This review focuses on real-world durability, ease of setup, and how the sail performs across patios, carports, and pool areas.

Key Features

• Material: Woven HDPE fabric provides a durable, tear-resistant surface that stretches less and holds shape under normal outdoor use.
• UV Protection: Blocks up to 95% of harmful UV rays to reduce sun exposure and cool the covered area by an estimated 10 to 15 degrees.
• Breathability: Water and air permeable design lets rain and breeze pass through, preventing pooling and reducing wind load on attachment points.
• Hardware Ready: Stainless steel D rings attached to reinforced white webbing make it straightforward to connect standard hardware kits or mounting points.
• Custom Options: Available in multiple colors and custom sizes so buyers can match existing outdoor aesthetics and fit unusual mounting layouts.
• Edge Construction: Double layered reinforced stitched seams and slightly curved edges resist fraying and help maintain tension when installed.

Who It's For

The ShadeMart rectangle sail is a good match for homeowners, renters, and RV owners who need a robust shade solution for patios, carports, pergolas, or poolside areas and value strong UV protection and airflow. It is also useful for people who want a decorative shade piece that integrates with an existing outdoor design and can be attached to poles, walls, or trees with the proper hardware.

Those who should look elsewhere are buyers who require a fully waterproof canopy or an ultra-light temporary sun tarp; this sail is intentionally water permeable and not sold as a waterproof shelter. Also measure carefully before ordering a custom size, since customers note sizing accuracy matters and sails are cut manually.

Pros & Cons

Pros

• Sturdy build with woven HDPE fabric and reinforced seams that resist fraying and hold tension well.
• Excellent sun protection that blocks about 95% of UV and noticeably lowers temperature under the sail.
• Stainless steel D rings and double webbing simplify secure mounting and improve long-term corrosion resistance.

Cons

• Not waterproof due to its breathable design, so it will not keep a space dry in heavy rain.
• Color selection and manual sizing can lead to small variations, so careful measuring is required.

Specifications

Our Verdict

The ShadeMart 17' x 20' rectangle shade sail is a practical, value-oriented choice for anyone wanting durable sun protection with airflow and strong UV blockage. It delivers on build quality, easy anchoring, and temperature reduction, making it a smart pick for patios, carports, and RV covers so long as you do not need a waterproof canopy and measure accurately for fit.

Frequently Asked Questions

Is this shade sail waterproof?
No, the fabric is water permeable and breathable, so it allows water to pass through rather than shedding heavy rain.

What hardware do I need to install it?
Use sturdy mounting hardware kits or anchors compatible with stainless steel D rings; posts, walls, trees, or roof anchors all work with correct fittings.

How much UV protection does it provide?
The sail blocks up to 95% of harmful UV rays and typically lowers shaded temperatures by about 10 to 15 degrees.