Custom Size 19ft x 21ft Blue Rectangle Sun Shade Sail - 95% UV Block

Our review of this custom size 19' x 21' blue rectangle shade sail finds it well suited for homeowners and small commercial spaces wanting heavy-duty sun protection without a permanent structure. The biggest reason to consider it is the combination of a true custom fit and high UV blockage: crafted from 200 GSM HDPE with up to 95% UV blockage, it reliably cuts sun exposure while remaining breathable and water permeable. Installation is straightforward for anyone comfortable with basic mounting hardware, and the reinforced corners and stainless steel D-rings give confidence for extended outdoor use.

Key Features

• 95% Sun Protection: The 200 GSM HDPE fabric blocks up to 95% of harmful UV rays to reduce sun exposure for people and furniture beneath it.
• Temperature Reduction: The canopy can lower temperatures by as much as 15 degrees compared with unshaded areas, making patios and play areas cooler.
• Customizable Fit: The sail is made to measure from D-ring to D-ring so users can specify a tailored fit for awkward or irregular spaces.
• Durable Construction: Stainless steel D-rings, reinforced edges, and double-layer stitching resist fraying and support heavier loads during wind events.
• Permeable Design: The material is water and air permeable, so rain and wind can pass through instead of collecting on the fabric.
• 3-Year Assurance: The product ships with a three-year assurance that covers manufacturing durability concerns.

Who It's For

This shade sail is ideal for homeowners with patios, decks, poolside areas, or lawns that need a customized rectangular cover and strong UV protection. It also fits small commercial settings like cafe patios or childcare play areas where a durable, breathable canopy that reduces temperature is desired.

People who want a quick pop-up or temporary fabric awning for occasional use should look elsewhere; this product is designed for a fixed installed look and relies on proper corner spacing and anchors for best performance. Customers needing a rigid or fully waterproof roof should consider rigid canopy options instead.

Pros & Cons

Pros

• High UV protection with up to 95% blockage to protect skin and outdoor furnishings.
• Breathable 200 GSM HDPE material that reduces temperature by up to 15 degrees beneath the sail.
• Reinforced edges and stainless steel D-rings increase longevity and resistance to fraying.
• Custom sizing from D-ring to D-ring allows a tailored fit for specific spaces.

Cons

• Not fully waterproof; the permeable fabric sheds some rain but will not provide a sealed roof.
• Proper installation requires attention to corner spacing and mounting hardware, which may be challenging for users without basic DIY experience.

Specifications

Size	Custom 19' x 21' (rectangle)
Material	200 GSM HDPE
UV Blockage	Up to 95%
Temperature Reduction	Up to 15 degrees compared to unshaded areas
Edges & Hardware	Reinforced edges with stainless steel D-rings
Permeability	Water and air permeable
Assurance	3-year assurance included

Our Verdict

The 19' x 21' custom blue rectangle shade sail is a practical, value-oriented choice for anyone needing strong UV protection and a cooler outdoor space without permanent construction. Its heavy-duty 200 GSM fabric, reinforced corners, and ability to be custom fitted make it especially good for patios and commercial seating areas where durability and temperature reduction matter.

Frequently Asked Questions

Is this sail waterproof?
The fabric is water and air permeable, so it sheds some rain but is not a fully waterproof roof.

How should I measure for a custom fit?
Measure from D-ring to D-ring for the final size; include recommended corner gaps of at least 0.5 ft or adjust 1 to 1.5 ft per side as advised for optimal tension.

How durable is the hardware?
The sail uses stainless steel D-rings and reinforced edges with double-layer stitching to resist fraying and handle demanding outdoor conditions.