Blue Rectangle Sun Shade Sail Canopy 20 ft x 21 ft - Heavy Duty UV

In this review of the Blue Rectangle Sun Shade Sail Canopy 20 ft x 21 ft, the bottom line is simple: this is a practical, heavy duty option for anyone who needs reliable sun protection over a patio or backyard spot. The biggest reason to buy is its fabric construction that claims up to 95% UV blockage, combined with sturdy stitched seams and stainless steel D-rings that make it feel like a product built for extended outdoor use. Installation is straightforward for a DIYer familiar with basic mounting points, and the breathable weave keeps the area cool while allowing rain and breeze to pass through.

Key Features

• 185GSM high density fabric: The polyethylene cloth is designed to resist fading and sun damage so the canopy stays effective over time.
• 95% UV blockage: The weave blocks most harmful UV rays, offering meaningful sun protection for people and furniture beneath it.
• Durable fittings: Reinforced stitched seams and stainless steel D-rings provide secure anchor points that reduce tearing when installed correctly.
• Breathable, water-shedding weave: The knitted fabric allows water and breeze to pass, reducing pooling and wind load compared with solid tarps.
• Custom sizes and Made in USA: The sail can be ordered to size, and the manufacturer offers support and a satisfaction guarantee.

Who It's For

This shade sail suits homeowners and renters who want a large, economical canopy for a patio, deck, pergola, pool area or carport and who value high UV protection and straightforward installation. It is also useful for small businesses or parks needing a versatile sunshade that can be tied to existing posts or trees.

Those who need permanent, rigid roofing or a fully waterproof structure should look elsewhere, as this product is a breathable fabric designed to reduce pooling rather than provide complete rain protection. Also, buyers expecting a lifetime of tear-free performance in extreme weather should plan for regular inspection and proper tensioning to avoid premature wear.

Pros & Cons

Pros

• Blocks up to 95% of UV, helping protect people and outdoor furnishings.
• Heavy 185GSM polyethylene fabric and reinforced edges give a sturdy feel on installation.
• Breathable knitted design reduces pooling and allows airflow to keep shaded areas cooler.

Cons

• Durability reports are mixed; some users experienced ripping after extended exposure, so proper tensioning and seasonal removal may be necessary.

Specifications

Our Verdict

The Blue Rectangle Sun Shade Sail Canopy 20 ft x 21 ft is a sensible choice for anyone needing broad, effective sun protection at a reasonable price; its 95% UV blockage and heavy 185GSM weave make it good value for patios, poolside areas and backyard covers. Buyers should install it with correct tensioning and inspect it seasonally to get the best service life.

Frequently Asked Questions

Will this sail block most of the sun?
Yes, the fabric is rated to block up to 95% of harmful UV rays, providing strong sun protection for shaded areas.

Is it waterproof?
No, the knitted polyethylene is breathable and allows water and breeze to pass through to reduce pooling rather than act as a fully waterproof tarp.

Can I order a different size?
Yes, custom sizes are available and the product is made in the USA; contact the seller for custom orders and fitting advice.