ColourTree Custom Size 18ft x 21ft x 27.7ft Grey Right Triangle Sun

In this review the ColourTree custom-size right triangle sun shade sail stands out as a practical choice for patios, pools and carports because of its heavy-duty 190 GSM virgin HDPE and industry-focused UV stabilization. For anyone needing a large, custom-shaped shade that reduces heat and blocks sunlight without trapping water, this sail delivers reliable sun protection and durability. The single biggest reason to buy is the fabric construction: a non-recycled, UV-tested HDPE that resists fading and tearing much longer than typical recycled sails.

Key Features

• 190 GSM virgin HDPE: Thick, non-recycled fabric provides a stronger, longer-lasting canopy compared with recycled alternatives.
• UV stabilized compound: Laboratory-tested material resists drying out and fading, helping the sail keep its strength under prolonged sun exposure.
• 95% UV blockage: Dense woven fabric significantly reduces harmful UV and lowers temperature in shaded areas for comfort on hot days.
• Breathable, water-permeable weave: Design allows air and rain to pass through to prevent pooling while maintaining shade and airflow.
• Reinforced edges and stainless D-rings: Double-layered stitched seams and heavy stitching at corners improve attachment strength and durability.
• 3 year limited warranty: Manufacturer warranty gives basic coverage under normal weather and use for added buyer confidence.

Who It's For

This shade sail suits homeowners and small businesses that want a large, custom-sized canopy for patios, balconies, pool areas or carports and who prioritize UV protection and long-term durability. Installers who plan attachment to poles, walls or solid anchors will appreciate the robust D-ring corners and heavy-duty seams.

It is less appropriate for people who need an off-the-shelf small square sail, or those who prefer a fully waterproof canopy rather than a breathable, water-permeable fabric. Also note that installation hardware is sold separately, so buyers who want a complete kit in one box should plan to purchase compatible cables and fittings.

Pros & Cons

Pros

• High-quality 190 GSM virgin HDPE fabric that resists UV damage and tearing.
• Blocks up to 95% of UV while remaining breathable to avoid water pooling.
• Reinforced seams and stainless steel D-rings provide sturdy attachment points.
• Backed by a 3 year limited warranty for normal use.

Cons

• Installation hardware and cables are not included, so extra purchases are required.
• Not fully waterproof by design, which is intentional but may not suit those needing complete rain protection.

Specifications

Shape	Right triangle
Custom size	18ft x 21ft x 27.7ft
Material	190 GSM 100% virgin HDPE
UV protection	Blocks 95% of UV
Hardware	Stainless steel D-rings on each corner (hardware sold separately)
Breathability	Woven, water-permeable fabric
Warranty	3 year limited warranty

Our Verdict

The ColourTree custom right triangle shade sail is a strong option for anyone who needs large-area sun protection with long-term durability. Its 190 GSM virgin HDPE and UV-stabilized treatment deliver reliable shade and color retention, and reinforced corners make installation secure when paired with proper hardware. It is a good value for outdoor living spaces where UV reduction and airflow matter most, provided buyers budget separately for quality mounting kits.

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 under the sail.

Is the material waterproof?
No. The sail is breathable and allows water to pass through to prevent pooling; it is not intended as a fully waterproof cover.

Are mounting kits included?
No. Installation hardware and cable ropes are required and sold separately; high-quality cables and fittings are recommended for best performance.