ShadeMart 13 ft x 18 ft Black Sun Shade Sail Rectangle - UPF50

In this review the ShadeMart 13' x 18' Black Sun Shade Sail is evaluated for homeowners and small-business owners who need a breathable, durable canopy that cuts heat and blocks UV. The bottom line is simple: this rectangle shade sail delivers strong sun protection and airflow, making it a practical choice for patios, carports, pergolas and pool areas where reduced temperature and UV blocking are priorities. Installation is straightforward with basic hardware, and the woven HDPE fabric and stainless steel D rings give it a robust, weather-ready feel despite not being fully waterproof.

Key Features

• Material: Woven HDPE fabric provides a balance of strength and breathability so the sail resists tearing while allowing air and water to pass through.
• UV protection: The fabric blocks up to 95% of harmful UV rays, significantly lowering temperatures in shaded areas by around 10 to 15 degrees.
• Hardware: Stainless steel corner D rings attached to heavy duty white webbing give secure attachment points for long-term outdoor use.
• Water permeability: The sail is water permeable and breathable, preventing water pooling and reducing wind load during storms.
• Custom sizing: Available in a range of custom sizes so buyers can match the sail to irregular or large venues when measured accurately.
• Styling: Rectangle shape and multiple color options allow the sail to integrate with existing outdoor decor while serving as functional shade.

Who It's For

This shade sail is best for homeowners, renters, and small-business owners who want an economical way to cool outdoor areas and block UV without erecting a permanent structure. It suits patios, carports, poolside lounging spots, pergolas and yards where airflow and sun protection matter.

People seeking a fully waterproof canopy, a guaranteed perfect geometric finish, or a product preassembled with heavy-duty anchor kits may want to look elsewhere; this model is water permeable by design and customers should account for small variations from manual measurements when ordering custom sizes.

Pros & Cons

Pros

• High UPF50 sun protection reduces sun exposure and measurable heat in shaded areas.
• Durable woven HDPE fabric and stainless steel D rings stand up to regular outdoor use.
• Water permeable design prevents pooling and eases performance in rain and wind.
• Available custom sizes and multiple colors help match different spaces and styles.

Cons

• Not waterproof, so it will not keep a space dry in heavy rain.
• Some customers report size variation or shape irregularity due to manual measurements.

Specifications

Our Verdict

The ShadeMart 13' x 18' Black rectangle shade sail is a sensible value for anyone who needs effective UV protection and improved outdoor comfort without building permanent shade. Its durable fabric and stainless fittings make it a long-lasting choice for patios, carports and pools, though buyers should expect permeability to rain and allow for minor size variation when ordering custom dimensions.

Frequently Asked Questions

Is the sail waterproof?
No. The fabric is water permeable and breathable so water will pass through rather than collect on the surface.

Can it be attached to trees or poles?
Yes. With proper hardware kits the sail can be secured to poles, trees, walls or roofs and adapted to many mounting points.

Will it block most UV and lower temperatures?
Yes. The HDPE fabric blocks up to 95% of UV and typically lowers shaded temperatures by about 10 to 15 degrees.