ColourTree 18ft x 21ft Green Sun Shade Sail Canopy - Heavy Duty UV

In this review the ColourTree 18' x 21' green sun shade sail is judged on durability, sun protection and practical use around patios and pools. The bottom line: this shade sail is for buyers who want a heavy duty, breathable canopy that blocks sunlight and stands up to sun exposure. Its standout attribute is the 190 GSM 100% virgin HDPE fabric treated with UV stabilized compound, which is designed to resist fading, tearing and premature breakdown under prolonged UV exposure.

Key Features

• 190 GSM virgin HDPE: Thick, non-recycled fabric provides a stronger, longer lasting canopy than thinner or recycled alternatives.
• UV stabilized compound: Laboratory-tested for extended UV exposure so the sail resists fading and drying out in direct sun.
• 95% UV blockage: The woven fabric significantly reduces harmful UV and lowers temperature in the shaded area for patios, pools and balconies.
• Breathable weave: Allows air and water to pass through so rain does not pool on the surface and cooling is improved under the sail.
• Reinforced edges and stainless D-rings: Double layered stitched seams and heavy stitching at corners improve durability and make mounting points more secure.
• 3 year limited warranty: Coverage under normal weather and use gives added confidence in expected lifespan.

Who It's For

This shade sail suits homeowners and small businesses that need reliable sun protection over a patio, carport, pool area or balcony and want a product built to resist prolonged sun exposure. It is especially useful where breathability matters to avoid heat buildup and water pooling after rain.

People who need precise, custom-fit solutions or prefer full waterproof covers should look elsewhere, since this is a breathable UV-blocking fabric rather than a waterproof tarp. Also note that installation hardware is sold separately, so buyers without mounting points or experience should budget for a proper hardware kit and cables.

Pros & Cons

Pros

• Thick 190 GSM virgin material feels sturdy and is more durable in sun than recycled fabric.
• Blocks 95% of UV which noticeably reduces temperature and sun exposure in shaded areas.
• Breathable design prevents water pooling and improves air flow under the sail.
• Reinforced seams and stainless D-rings make attachments secure and long lasting.

Cons

• Installation hardware is not included and cables/attachments must be purchased separately.
• Size feedback is mixed among buyers, so measure mounting points carefully before ordering.

Specifications

Product type	Rectangle sun shade sail canopy
Size	18 ft x 21 ft
Material	190 GSM 100% virgin HDPE (non-recycled)
UV performance	Blocks approximately 95% of UV
Edges and fittings	Double layered stitched seams with stainless steel D-rings
Breathability	Woven fabric allows air and water to pass through
Warranty	3 year limited warranty

Our Verdict

The ColourTree 18' x 21' green shade sail is a practical, value-focused choice for anyone wanting strong UV protection and a long-lasting fabric canopy. Its 190 GSM virgin HDPE and UV-stable treatment make it a smarter pick for sun-exposed installations, while reinforced edges and D-rings improve reliability. Buy this if you need durable shade and plan to purchase a matching hardware kit for secure installation.

Frequently Asked Questions

Does this sail block a lot of UV?
Yes, the woven fabric is rated to block about 95% of harmful UV, reducing heat and sun exposure beneath the sail.

Is the material waterproof?
No, the fabric is breathable so water passes through to avoid pooling; it is not a waterproof tarp.

Are mounting fittings included?
No, installation hardware and cables are sold separately and high quality kits are recommended for best performance.