ShadeMart 12 ft x 20 ft Blue Sun Shade Sail UPF50 Rectangle - Durable

Our review of the ShadeMart 12 ft x 20 ft Blue Sun Shade Sail finds it best suited for homeowners and renters who want a simple, durable way to cut sun and heat over patios, pools, or carports. The single biggest reason to buy is its combination of woven HDPE fabric with stainless steel corner D rings and heavy webbing, which delivers long-term sun protection and durability without feeling like an indoor awning. It is a breathable, water-permeable sail that blocks most UV while lowering surface temperatures noticeably.

Key Features

• Material: Woven HDPE fabric provides a balance of strength and breathability so the sail resists tearing while allowing airflow.
• UV protection: Rated to block up to 95% of harmful UV rays, which helps reduce heat and sun exposure under the canopy.
• Hardware: Stainless steel corner D rings attached to heavy duty white webbing give secure attachment points for standard mounting kits.
• Water permeability: The fabric is water permeable and breathable, so rain and wind pass through instead of pooling on the surface.
• Custom sizes: Multiple sizes are offered and the vendor can customize dimensions, so it can fit nonstandard patios and carports when measured accurately.

Who It's For

This shade sail is ideal for homeowners who need a low-maintenance sun cover for a patio, pool area, pergola, or carport and who value UV blocking performance and airflow. It also fits DIY installers who will use compatible hardware kits to mount to poles, trees, walls, or roofs.

It is less suitable for buyers who need a fully waterproof canopy or precision-cut architectural sails where perfect rectangular geometry is critical; customers should measure carefully and expect small variances from manual measurements.

Pros & Cons

Pros

• Strong woven HDPE resists wear and keeps the sail breathable during rain and wind.
• Blocks up to 95% of UV rays, noticeably lowering temperatures beneath the sail.
• Stainless steel D rings and heavy webbing provide reliable anchor points for hardware.
• Custom size options make it flexible for different outdoor spaces.

Cons

• Not waterproof, so it will not keep an area dry during heavy rain.
• Size and shape can vary slightly due to manual measurements, leading to mixed feedback on fit.

Specifications

Brand	ShadeMart
Shape	Rectangle
Size	12 ft x 20 ft
Material	Woven HDPE (High Density Polyethylene)
UV protection	Blocks up to 95% of UV rays (UPF50)
Hardware	Stainless steel corner D rings with heavy duty webbing
Weather	Water permeable; not waterproof

Our Verdict

The ShadeMart 12 ft x 20 ft Blue Sun Shade Sail is a practical, value-oriented choice for outdoor shading where UV protection, airflow, and durability matter more than waterproofing. It is a good buy for patios, pools, and carports when paired with the right mounting hardware, and the custom size option adds flexibility for awkward spaces.

Frequently Asked Questions

Is this shade sail waterproof?
The sail is water permeable and breathable; it is not waterproof and will allow rain to pass through.

Can I attach it to trees or poles?
Yes; with proper hardware kits the stainless steel D rings and webbing let you attach the sail to poles, trees, walls, or roofs.

Will it block sun and heat?
Yes; the woven HDPE fabric blocks up to 95% of UV rays and typically lowers surface temperatures noticeably beneath the canopy.