Custom Size 9ft x 9ft x 12.7ft Waterproof Blue Triangle Sun Shade Sail

In this review of the custom size 9' x 9' x 12.7' blue triangle sun shade sail, the bottom line is simple: it is for homeowners and small business owners who need a robust, water-resistant shade solution that also blocks significant UV. Our review finds the sail best for patios, carports, and yards where fast installation and tangible temperature reduction matter most, because the polyester material with a PU coating keeps water out while the fabric blocks up to 90% of harmful sun, delivering cooler, usable outdoor space.

Key Features

• Waterproof material: Polyester with a PU waterproof coating prevents water and wind from passing through, so the shaded area stays dry during light rain.
• High UV blockage: Blocks up to 90% of harmful UV, providing strong protection for people and outdoor furniture under the sail.
• Temperature reduction: The canopy can lower the temperature by as much as 15 degrees under the shade, making outdoor time more comfortable on hot days.
• Reinforced edges and corners: Dual-layer white webbing and stainless steel D rings at the corners increase durability and anchor strength for mounting.
• Quick to install: The lightweight triangular shape can be taken down or set up in roughly five minutes, enabling seasonal or temporary use.
• Warranty: A 3 year limited warranty is included, which helps protect the purchase against manufacture defects.

Who It's For

This shade sail is ideal for homeowners with patios, decks or small carports who want a practical, waterproof canopy that also offers strong UV protection. It suits gardeners and outdoor hosts who need quick installation and a durable solution that resists sun and light rain.

It is less suitable for those needing very large continuous coverage or for permanent roofing where structural snow load or heavy, prolonged rain is expected; heavy storms and persistent pooling are better handled by rigid awnings or solid roofing systems.

Pros & Cons

Pros

• Durable waterproof fabric with PU coating provides effective rain resistance and wind protection.
• Blocks up to 90% of UV, helping protect skin and furnishings from sun damage.
• Reinforced edges and stainless steel D rings give reliable anchor points and longer life.
• Easy to install and remove, useful for seasonal or temporary shade needs.

Cons

• Some buyers report size expectations vary, so custom sizing should be confirmed carefully before ordering.
• While waterproof for light rain, it is not a substitute for a rigid roof in heavy or prolonged storms.

Specifications

Product type	Triangle sun shade sail
Size	9ft x 9ft x 12.7ft
Material	Polyester with PU waterproof coating
UV protection	Up to 90% UV blockage (UPF50+)
Edge finish	Dual-layer white webbing with curved edges
Corner hardware	Stainless steel D rings attached to webbing
Warranty	3 year limited warranty

Our Verdict

This custom size triangle shade sail is a practical, cost-effective choice for anyone seeking a quick-install, waterproof canopy that offers strong UV defense and measurable cooling below the fabric. For patios, carports, and yard seating it delivers good value, durable construction and the convenience of seasonal removal, though buyers should confirm exact sizing needs and avoid using it as a permanent, structural roof replacement.

Frequently Asked Questions

Is this shade sail waterproof?
The sail is made of polyester with a PU waterproof coating, so it resists water and does not allow light rain or wind-driven moisture to pass through.

How much sun does it block?
The fabric blocks up to 90% of harmful UV, providing significant protection under the shade.

Can it be left up year round?
It is designed for outdoor use and durable materials, but it is best used seasonally or removed in heavy storms or snow to avoid damage.