70% 20 x 20 ft Black Shade Cloth - Durable Outdoor Sunblock

Our review of the 70% 20 x 20 ft Black Shade Cloth finds it best suited for homeowners and hobby gardeners who need a large, breathable sunshade that is easy to install and offers reliable sun protection. The single biggest reason to buy is its combination of a true 20 x 20 ft size with a 70% shading rate, which creates a noticeably cooler area while remaining breathable for plants and pets. The cloth feels lightweight yet sturdy, and the built-in grommets and reinforced corners make mounting simple for one person.

Key Features

• Size and coverage: The full 20 x 20 ft dimensions provide broad shade coverage suitable for patios, greenhouses, or large garden beds without unusual seams.
• 70% sun shading: The HDPE polyethylene weave blocks most direct sun while still allowing filtered light, helping to lower temperatures under the cloth.
• Reinforced installation points: Grommets every 3.3 ft and corner buckles with plastic backing distribute stress and make mounting with rope or ties straightforward.
• Lock-stitch knit: Upgraded two-sided lock-stitch knitting prevents unraveling and increases tear resistance compared with simple knits.
• Breathable construction: The fabric lets air and water pass, reducing trapped heat and allowing rain to drip through, which suits plants and outdoor use.
• Weather adaptable: The material resists UV fading and helps moderate temperature swings so covered plants are less exposed to cold drafts in winter.

Who It's For

This shade cloth is ideal for homeowners with a backyard patio, a gardener protecting vegetables and seedlings, or anyone covering a kennel, barn or pool area who wants a large, single-piece shade solution. It is particularly useful where airflow matters, since the breathable HDPE keeps air moving while cutting most direct sun.

People who need a custom-shaped awning or a heavy-duty industrial tarp should look elsewhere; this product is optimized for sun control and breathability rather than complete waterproofing or rigid weatherproofing. Also consider a smaller or heavier-duty option if you need permanent, storm-proof coverage.

Pros & Cons

Pros

• Large 20 x 20 ft size covers a substantial area without seams.
• Good 70% shading reduces heat while still admitting filtered light for plants.
• Grommets and reinforced corners make installation quick and reduce deformation under tension.
• Lock-stitch knitting and upgraded raw material improve durability and resistance to unraveling.

Cons

• Material is breathable rather than waterproof, so it does not provide full rain protection.
• Some users report tearing under extreme wind or snagging if not secured carefully.

Specifications

Product type	Outdoor sun shade cloth
Color	Black with orange lines
Size	20 x 20 ft
Shading rate	70%
Material	HDPE polyethylene, lock-stitch knit
Attachment	Grommets every 3.3 ft and corner buckles

Our Verdict

This 70% 20 x 20 ft Black Shade Cloth is a practical, value-oriented choice for people who need a large, breathable sunshade that is easy to install and holds up over time. It is especially good for patios, gardens, greenhouses and pet areas where airflow and UV resistance matter; just be aware it is not a waterproof tarp and requires secure fastening in windy locations.

Frequently Asked Questions

Is this shade cloth waterproof?
The fabric is breathable HDPE and allows water to pass through, so it is not designed as a waterproof cover.

How is the shade cloth installed?
It has grommets every 3.3 ft plus reinforced corner buckles; installers typically hang or tie it with rope through the grommets for an even tensioned fit.

Will it protect plants in winter?
The cloth provides some thermal moderation and UV protection which can help reduce cold stress on plants, but it is not a full cold-frame or frost blanket.