ShadeMart 17 ft x 18 ft Black Sun Shade Sail UPF50 - Cool, Durable

In this review the ShadeMart 17' x 18' black rectangle shade sail is evaluated as a practical, no-frills outdoor canopy for homeowners and small businesses who need reliable UV protection and airflow. The biggest reason to consider it is the fabric: woven HDPE construction that blocks up to 95% of harmful UV rays while remaining water-permeable and breathable, which keeps covered areas noticeably cooler without trapping moisture. The sail is best for patios, carports, pergolas and poolside shade where airflow and UV blocking are priorities.

Key Features

• Material: Woven HDPE fabric provides strong, tear-resistant coverage that delivers long-lasting sun protection and breathability.
• UV Protection: Blocks up to 95% of UV rays, helping to lower temperatures under the canopy by roughly 10 to 15 degrees.
• Hardware: Stainless steel D rings attached to heavy duty white webbing offer secure anchor points and durability at each corner.
• Water Permeable: The design allows water and air to pass through, reducing wind lift and preventing pooling compared with solid canopies.
• Custom Sizing: Multiple sizes and custom options let buyers match the sail to patios, carports or odd-shaped outdoor spaces when measured accurately.
• Styling: Rectangular shape and color choices let the sail integrate with existing outdoor decor while providing functional shade.

Who It's For

The ShadeMart 17' x 18' sail is ideal for homeowners who want a durable sun screen for a patio, poolside area or carport and who value UV resistance and airflow over full waterproofing. It also fits renters or DIYers who can use trees, poles or walls for attachment and want an affordable solution that holds up in normal weather.

Shoppers who need a fully waterproof shelter, or who cannot provide solid anchor points for the corner D rings, should look elsewhere. Also measure your site carefully before ordering a custom size since the sail dimensions are delivered based on manual measurement and fit matters for tension and performance.

Pros & Cons

Pros

• High quality woven HDPE fabric that blocks most UV and feels durable.
• Stainless steel corner D rings and heavy webbing provide secure attachment points.
• Breathable, water-permeable design prevents pooling and improves airflow.
• Good value and relatively easy to install with the proper hardware kit.

Cons

• Not waterproof, so it will not keep rain out during heavy storms.
• Size accuracy can vary due to manual measurements; careful measuring is required.

Specifications

Our Verdict

The ShadeMart 17' x 18' black shade sail is a solid choice for anyone who needs affordable, effective UV protection with good airflow and durability. It is especially good for patios, carports and pool areas where water permeability and wind performance matter; just remember it is not waterproof and accurate measuring is important. For the price and build, it represents good value for most outdoor shading needs.

Frequently Asked Questions

Is this shade sail waterproof?
No. The fabric is water permeable and breathable so it will not keep out heavy rain but will reduce sun exposure.

Can it be attached to trees or poles?
Yes. With proper hardware kits the stainless steel D rings and webbing allow attachment to poles, trees, walls or roofs.

Does it really block UV rays?
Yes. The woven HDPE fabric blocks up to 95% of harmful UV rays and helps lower temperatures under the sail.