ColourTree Custom Size 21 ft x 23 ft Black Sun Shade Sail - Heavy Duty

In this review of the ColourTree custom size 21 ft x 23 ft black sun shade sail canopy, the bottom line is simple: this is a heavy duty, UV-focused shade for people who need long-lasting sun protection over patios, pools or carports. The reviewer found the standout reason to buy is the thick 190 GSM virgin HDPE fabric treated with a UV stabilized compound, which the manufacturer says passed extensive UV testing and resists fading and tearing better than recycled alternatives. Installation requires proper hardware but the finished canopy delivers noticeable shade and cooler spaces.

Key Features

• 190 GSM virgin HDPE: The thick, non-recycled fabric provides a denser weave that feels sturdier and is intended to extend service life under sun exposure.
• UV stabilized compound: Lab-tested UV treatment reduces fading and drying, helping the sail hold up through prolonged sun without becoming brittle.
• 95% UV blockage: The woven fabric blocks most harmful UV rays and lowers temperature beneath the canopy for more comfortable outdoor use.
• Breathable woven material: Air and water pass through to prevent pooling and reduce wind stress while still providing effective sun protection.
• Reinforced edges and stainless D-rings: Double-layer stitched seams and heavy corner stitching keep the sail taut and make for secure anchor points when paired with proper hardware.
• Three year warranty: A limited warranty covers normal weather and use, offering some assurance of durability.

Who It's For

The ColourTree 21 ft x 23 ft shade sail is best for homeowners or small commercial spaces needing a large, durable rectangle shade that prioritizes UV protection and longevity. It is a good fit where a breathable canopy is desirable, such as over patios, pools, porches or carports, and for buyers who will pair it with robust shade sail hardware and secure anchor points.

Those who should look elsewhere are buyers who want a fully waterproof tarp, a lightweight temporary cover, or an all-in-one mounting kit included with the sail. This product requires separately purchased hardware and is optimized for sun and breathability rather than complete water sealing.

Pros & Cons

Pros

• Durable 190 GSM virgin HDPE material resists fading and tearing in strong sun.
• Blocks up to 95% of harmful UV for cooler shaded areas and better sun protection.
• Breathable weave prevents water pooling and reduces wind stress on the fabric.
• Reinforced seams and stainless steel D-rings make attachment secure when installed correctly.

Cons

• Installation requires separate hardware and correct cable choice; nylon ropes are not recommended.
• Not fully waterproof - allows water through by design, which some users may interpret as only water resistant.

Specifications

Size	21 ft x 23 ft
Material	190 GSM 100% virgin HDPE
UV Protection	Blocks 95% of UV
Construction	Double layered reinforced stitched seams with stainless D-rings
Breathability	Breathable woven fabric, allows water and air through
Warranty	3 years limited warranty

Our Verdict

The ColourTree 21 ft x 23 ft black sun shade sail is a practical choice for anyone who needs a large, long-lasting canopy that focuses on UV protection and durability. It offers strong value when paired with proper hardware and is best for patios, pools and carports where breathability and reduced heat are priorities rather than complete waterproofing.

Frequently Asked Questions

Does this sail block a lot of UV?
The fabric is rated to block about 95% of harmful UV, providing significant sun protection and cooler shaded areas.

Is hardware included for installation?
No, mounting hardware is sold separately and the sail requires cables or hardware; avoid nylon ropes and use recommended shade sail fittings.

Will water pool on the sail?
No, the breathable woven fabric allows water to pass through to prevent pooling, so it is water resistant but not designed as a waterproof tarp.