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

Our review of the ColourTree 21' x 21' Black Sun Shade Sail finds it best for homeowners and small commercial spaces seeking strong sun protection without permanent construction. The single biggest reason to buy is its thick 190 GSM virgin HDPE fabric, which is treated with a UV stabilized compound and laboratory-tested for long-term sun exposure, so it resists fading and degradation while blocking heat and harmful rays.

Key Features

• 190 GSM virgin HDPE: Thicker non-recycled fabric provides noticeably stronger feel and longer wear than typical lightweight sails.
• UV stabilized compound: Fabric is treated to resist drying, tearing and fading after prolonged sun exposure for better longevity.
• 95% UV blockage: The woven material blocks most harmful UV and reduces temperature in shaded areas for more comfortable outdoor use.
• Breathable woven design: Allows air and water to pass through to prevent pooling and reduce wind lift compared with solid canopies.
• Reinforced edges and D-rings: Double layered stitched seams and stainless steel D-rings improve attachment strength and help the sail keep its shape.
• 3 year limited warranty: Warranty covers normal weather and usage, offering added buyer confidence for outdoor installations.

Who It's For

The ColourTree 21' x 21' shade sail is aimed at patio, poolside and balcony owners who want a large, breathable canopy that blocks most UV and lowers surface temperature. It is well suited to people who prioritize heavier fabric and reinforced construction for seasonal or semi-permanent outdoor shade.

Those who need a permanent waterproof roof, tailor-made installations without hardware, or who require ultralight camp-style fabric should look elsewhere; installation hardware is sold separately and high-tension or high-wind coastal situations may need additional reinforcement beyond the standard D-ring attachments.

Pros & Cons

Pros

• High-quality 190 GSM virgin material feels durable and resists fading under sun exposure.
• Blocks 95% of UV to improve comfort and protect surfaces beneath the sail.
• Breathable fabric prevents water pooling and reduces uplift compared with solid tarps.
• Reinforced seams and stainless steel D-rings simplify secure mounting when paired with proper hardware.

Cons

• Hardware kits are not included, so buyers must purchase appropriate cables and fittings separately for a reliable installation.
• Some customers report mixed durability in extreme wind conditions, so additional anchoring or stronger fittings may be necessary.

Specifications

Our Verdict

The ColourTree 21' x 21' Black Sun Shade Sail is a practical, higher-weight option for homeowners and small commercial areas who want strong UV protection and a breathable canopy. It delivers good value when paired with quality hardware and is especially attractive for those who prefer virgin HDPE over recycled blends for longer life, though buyers should plan for separate installation fittings and consider extra reinforcement in very windy locations.

Frequently Asked Questions

Does the sail come with hardware?
The sail does not include mounting hardware; cable ropes and shade sail hardware kits must be purchased separately and nylon ropes are not recommended.

Is the fabric waterproof?
The woven HDPE is breathable and allows water to pass through, so it is not a waterproof roof but will prevent pooling.

How long is the warranty?
ColourTree provides a 3 year limited warranty under normal weather and usage conditions.