ShadeMart 5 ft x 18 ft Waterproof Shade Sail Rectangle - 95% UV

In this review the ShadeMart 5' x 18' waterproof shade sail is evaluated as a simple, heavy-duty canopy for patios, carports and backyards that need reliable sun and light-rain protection. The bottom line: this rectangle sail is best for homeowners who want a durable, reinforced fabric that cuts heat and UV without complicated installation; the single biggest reason to buy is the combination of a PU waterproof coating and reinforced corners that make it effective as a seasonal canopy and easy to tension tightly for proper drainage.

Key Features

• Waterproof fabric: The polyester fabric with PU coating helps keep out light rain and wind, making the sail usable during brief showers.
• 95% UV blockage: The woven canopy blocks most harmful UV rays and reduces surface temperature by up to 15 degrees compared with no shade.
• Reinforced edges: Dual-layer white webbing under curved edges improves tear resistance and keeps the fabric stable under tension.
• Stainless steel corners: D rings attached to reinforced corners provide solid anchor points for a taut installation.
• Custom size option: Custom sizing is available and typically processed in about two business days for a better fit to specific outdoor layouts.
• Simple maintenance: The canopy is compact to install or uninstall seasonally and can be paired with a matching hardware kit for quicker setup.

Who It's For

Homeowners with small to midsize patios, carports or backyard seating areas who want a cost-effective way to cut heat and glare will appreciate this shade sail. It is particularly well suited to people who can install and tension the fabric properly and who need a shelter that holds up to light rain and provides significant UV protection.

Those needing an all-weather permanent awning or expecting heavy storm exposure should look elsewhere; the sail resists light rain but may not withstand significant water accumulation or storm forces, and an appropriate hardware kit and correct tensioning are required for best performance.

Pros & Cons

Pros

• Durable build quality with strong stitching and reinforced corner loops that customers praised for reliability.
• Effective shade and temperature reduction, often lowering patio surface heat by a noticeable amount.
• Good value for money given the waterproof coating, UV blockage, and reinforced construction.
• Relatively easy to install when paired with a proper hardware kit and correct tensioning technique.

Cons

• Not intended for heavy storms; water accumulation can cause sagging or stress if not kept taut.
• Color and exact size perception vary among buyers, so double-check measurements before ordering a custom cut.

Specifications

Product type	Rectangle shade sail canopy
Dimensions	5' x 18'
Material	Polyester with PU waterproof coating
UV protection	Up to 95% UV blockage
Edges and corners	Curved edges with dual webbing and stainless steel D rings
Installation	Requires tensioning; hardware kit sold separately (Shademart kit recommended)
Lead time	Custom sizes usually take 2 business days

Our Verdict

The ShadeMart 5' x 18' waterproof shade sail is a practical, value-oriented canopy for patios, carports and backyard seating that need reliable sun and light-rain protection. Buyers who install it with correct tension and use a suitable hardware kit will get strong UV blockage, measurable temperature reduction, and a durable reinforced build at a fair price.

Frequently Asked Questions

Can this sail handle heavy rain?
The sail resists light rain thanks to the PU coating, but it is not designed for prolonged heavy storms; keep the fabric taut to avoid water pooling.

Is installation hardware included?
No, the installation kit is not included; the manufacturer recommends using the Shademart hardware kit for easier and more secure installation.

Are custom sizes available?
Yes, custom sizes are available and usually processed in about 2 business days; confirm measurements carefully before ordering.