ShadeMart 18ft x 19ft Blue Sun Shade Sail UPF50 Rectangle - Cool

In this review of the ShadeMart 18' x 19' Blue Sun Shade Sail UPF50, the bottom line is straightforward: this heavy duty rectangle canopy is for homeowners and small businesses who want reliable UV protection and noticeable cooling for patios, carports or poolside areas. It earns praise for durable woven HDPE fabric and stainless steel corner D rings, and it blocks up to 95% of harmful UV rays while remaining water and air permeable. The sail is best chosen when you need a sturdy, breathable shade solution rather than a waterproof cover.

Key Features

• Woven HDPE fabric: The high density polyethylene weave provides a tough, fade-resistant surface that holds up in sun and wind while allowing airflow.
• Stainless steel D rings: Heavy duty stainless steel corners attached to white webbing give secure attachment points for proper tension and long-term durability.
• Water permeable design: The sail lets water and air pass through, preventing pooling and reducing wind load compared with solid tarps.
• UPF50 sun protection: Blocks up to 95% of harmful UV rays to significantly lower temperatures beneath the canopy.
• Custom sizing available: A selection of custom sizes lets you match unusual spaces, provided you measure the venue accurately before ordering.
• Decorative rectangle shape: The simple rectangle form and color options integrate with existing outdoor designs while providing functional shade.

Who It's For

This shade sail is ideal for homeowners with patios, pergolas, carports or pool areas who want a durable, breathable canopy that reduces sun exposure and heat. It is a practical choice for yards with trees or posts for mounting, and for renters who need a removable shade solution without permanent construction.

Those who should look elsewhere include people needing a fully waterproof cover or anyone who cannot provide secure anchoring points; this style is expressly water permeable and relies on proper hardware and attachment locations to perform as intended.

Pros & Cons

Pros

• Durable construction from woven HDPE makes the sail long lasting and resistant to fading.
• Corner stainless steel D rings and heavy webbing provide secure mounting and improved strength.
• Breathable, water permeable fabric prevents water pooling and helps reduce temperature beneath the canopy.
• Blocks up to 95% of UV rays, offering strong sun protection and cooling effect.

Cons

• Not waterproof, so it does not replace a rainproof cover in wet climates.
• Size accuracy depends on careful measurement; customers report mixed impressions about sizing.

Specifications

Our Verdict

The ShadeMart 18' x 19' Blue Sun Shade Sail is a solid, cost-effective canopy for anyone seeking reliable UV protection and improved outdoor comfort without trapping water. Its sturdy HDPE weave and stainless steel corners make it good value for patios, carports and poolside areas; just be sure you want a breathable, not waterproof, shade solution and measure carefully before ordering.

Frequently Asked Questions

Is this shade sail waterproof?
No. The fabric is water permeable and breathable so it will not hold pooled water and is not intended as a rainproof cover.

How much UV protection does it provide?
The sail offers UPF50 protection and blocks up to 95% of harmful UV rays to reduce sun exposure and lower temperatures beneath the canopy.

Will it withstand strong winds?
With proper hardware and secure anchoring, customers report the fabric and stainless steel corners hold up well; extreme weather should still be avoided.