Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
You need a 20 ft tarp that survives the season, not one that shreds in the first windstorm. The single number that decides that is the mil thickness (a mil is one-thousandth of an inch, so higher means thicker and tougher). This guide ranks the best 20 ft tarps by that thickness and by what buyers report from real use, so you can match the right one to your job instead of guessing.
I’m Mohammad Maruf — the founder and writer behind KitchPrep. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
20 ft tarp buyers face a real problem: thicker means tougher, but also heavier and pricier, so picking the right weight for your exact need is the key to not wasting money.
Our Picks at a Glance
How To Choose The Best 20 Ft Tarp
Pick a tarp by matching its thickness to the weather it will face. A thin tarp is fine for a few weekends of shade, but a roof or boat cover needs the heaviest material you can handle.
Start With The Mil Thickness
The mil rating is the tarp’s thickness in thousandths of an inch. A 9 mil tarp is light and easy to fold but will stretch and tear under heavy snow or sharp branches. A 20 mil tarp is a serious shield that shrugs off wind and sun, but it weighs far more and costs more.
Check The Weave And The Grommets
A tarp is only as strong as its weakest point, which is usually the edge. Look for a high weave count, like 16×16, which means the fibers are packed tightly for extra tear resistance. Grommets spaced closer together, around 18 inches or less, give you more tie-down points so the tarp stays put in wind.
Quick Comparison
| Model | Best For | Thickness | Grommet Spacing | Weight | Amazon |
|---|---|---|---|---|---|
| TARPAL 20×20 20 Mil★ Best Overall | Extreme weather & all-purpose | 20 mils | 17.7 inches | — | Amazon |
| Kesfitt 10×20 16 MilBudget Champion | Budget-friendly coverage | 16 mils | 23 inches | — | Amazon |
| SpacEver 20×20 12 MilBest Value | Value & versatility | 12 mils | — | 6.8 kg | Amazon |
| RAINDEWAY 20×20 9 Mil | Light-duty jobs | 9 mils | — | 5 kg | Amazon |
| RAINDEWAY 20×20 14 Mil D-Ring | Heavy duty & securing | 14 mils | 23.5 inches | 20.9 pounds | Amazon |
| SpacEver 20×20 16 Mil | Multipurpose protection | 16 mils | — | 8.99 kg | Amazon |
| TARPAL 20×20 Black 14 Mil | Shade & heat blocking | 14 mils | 17.7 inches | 7.26 kg | Amazon |
| Xpose Safety 20×20 20 Mil | Maximum durability | 20 mils | 18 inches | 33.5 pounds | Amazon |
In‑Depth Reviews
1. TARPAL 20×20 Feet Super Heavy Duty Tarp
Our pick — over 4.5★ from 850+ verified ratings; the strongest balance of quality and price.
The 20 mil beast that treats a hurricane like a light breeze.
This is the tarp to grab when you cannot afford a failure. It is a full 20 mil thick, the same top-tier thickness as the Xpose Safety pick, but it stands out for its build quality and the way owners describe it handling brutal conditions. The 16×16 fabric density makes it genuinely waterproof, and the material blocks UV so it resists getting baked brittle in the sun.
The grommets are the standout detail here. They are set closer together at 17.7 inches, which means more tie-down points and a tighter, more secure fit in wind. Owners use it as a top for an outdoor cover, and they report it is sturdy, easy to install, and holds up well against both wind and sun exposure.
The two-tone grey/brown finish is practical, not just cosmetic. Several owners say it blends with a house or garage instead of screaming “blue tarp,” and one used it to cover a 5’8″ pickup bed with a good fit. The trade-off: larger sizes are seamed rather than one solid piece, so skip it if you need a perfectly smooth sheet.
What wins people over
- Top-tier 20 mil thickness shrugs off heavy weather
- Grommets every 17.7 inches give a secure, wind-proof fit
- Tear-resistant and holds up to sun exposure without degrading
Worth knowing
- Larger sizes come seamed, not as one solid sheet
Reach for this if: you need maximum protection for a boat, roof, or firewood pile that faces real weather all year.
Keep in mind: the seamed construction on big sizes is the one thing to expect.
2. Kesfitt 16 Mil Heavy Duty Waterproof Tarp, 10×20 FT
A 16 mil workhorse that proves budget-friendly can still mean heavy-duty.
This is the pick for anyone who wants serious protection without paying flagship prices. It is 16 mil thick, which is a full 67% thicker than the 12 mil SpacEver option, and that extra thickness shows up in how owners describe it: nice and thick, very durable, and sturdy. It is made from 100% virgin polyethylene with a dense 15×17 woven fabric.
The white surface does real work here. It reflects light to cut heat buildup, which makes it smart for shading a patio or covering gear that would bake in the sun. One owner used it as a storage unit floor barrier, folding the 10×20 in half to double up to a 32 mil barrier against cement moisture and cold, and said it exceeded expectations.
Owners mention it stays flat in wind even on grass, using the grommets to secure a 16ft inflatable dome with perfect coverage. The grommets are spaced at 23 inches, giving you solid anchor points for tie-downs. The main caveat is cosmetic: the blue side has green edges that some find a little odd, so if you are picky about looks, use the green side.
Why it earns its keep
- Thick 16 mil build handles wind and rain with ease
- White surface reflects heat for cooler shade
- Doubles up easily when you need a thicker barrier
The honest trade-off
- Color mismatch: the blue side has green-tinted edges
Best for: the budget buyer who still needs a genuinely thick tarp that can take a beating.
pass on it if: you need a true 20×20 footprint — this one runs 10×20.
3. SpacEver 20×20 FT 12 Mil Thick Tarp
A true 20×20 square that proves value and toughness can share a tarp.
If you actually need the full 20×20 footprint at a sensible price, this is the one. It is 12 mil thick, which makes it a middle-ground pick — lighter and easier to handle than the 16 or 20 mil tarps, but still thick enough to resist tearing. It is reversible, so you can use either side, and the tightly woven polyethylene fibers resist both water and cold.
Owners have put it through serious punishment. The review pages show it withstood -30F temperatures and a winter of snowstorms while protecting a camper roof from leaks until a repair could happen. One owner stacked it over an existing shelter cover that had split and found the reinforced edges strong enough to tie down securely with the grommets.
At 6.8 kg, it is manageable for this size but not feather-light. The four corners get reinforced edges and internal ropes, and rust-proof grommets (metal rings that won’t corrode) add stability. This is the balance for covering a pool, a chicken coop, or construction materials when you want real protection without the full weight of a 20 mil sheet.
The durable middle ground
- Full 20×20 coverage at a fair price
- Reversible design with reinforced corners
- Survived -30F and heavy snow in owner testing
Know before you buy
- At 12 mil, it gives up some toughness to the thicker picks
Who it fits: the value-focused buyer who wants a true 20×20 sheet for general outdoor protection.
Who it does not: anyone expecting extreme-weather armor — step up to 16 or 20 mil for that.
4. RAINDEWAY 20×20 Feet 9 Mil Tarp
The lightest pick here, ideal for camping and quick shade setups.
Do not let the 9 mil thickness scare you off. This is a medium-duty tarp built for jobs where you want something easy to handle, and it has a 5.3 oz/sq yard weight with a 10×10 weave count. Owners describe it as lightweight but still sturdy enough for regular use, and it handled rain and wind well at a camping retreat.
The grommets are solidly affixed with reinforced edges, and the material has a good heft to it even at this lighter weight. It worked great for covering gear outdoors and for camping, and the green/black color is a crowd-pleaser — one owner was glad to find this color option after usually settling for whatever the hardware store had. It is also marked as suitable for emergency preparedness, boating, and picnics.
The recurring note in the reviews is thickness: some find it good for the price while others say it runs a bit thin. That is the nature of a 9 mil tarp — it is honest about being a lighter-duty tool. At 5 kg, it is the easiest full-size tarp here to fold up and carry, which makes it the right call for a tent footprint or a temporary shade wall.
What it does well
- Lightweight and easy to haul at 5 kg
- Solid grommets with reinforced, finished edges
- Handles rain and wind for camping and gear storage
Set expectations
- Thickness is the trade-off — some owners find it thin
Best suited for: campers and casual users who want a true 20×20 tarp that folds up small and light.
Think twice if: you are covering a roof or boat through winter — the thicker options protect better.
5. RAINDEWAY 20×20 Feet 14 Mil Tarp with D-Rings
The 14 mil tarp that swaps grommets for rugged D-rings.
Here is the tarp for secure tie-downs. Instead of standard grommets, this 14 mil RAINDEWAY uses reinforced D-rings around the entire edge, spaced about 23.5 inches apart. D-rings are double reinforced with tarp material and quality stitching, which makes them a stronger anchor point than a plain punched hole when you are lashing things down.
At 14 mil thick with a 16×16 weave count (threads per inch in each direction) and 20.9 pounds, this is built for serious conditions. One owner kept it over a fishing boat all winter, another reports it survived heavy winds, and a third left a 20×24 version on a 12×20 shelter for two New England years and says it still looks new after sun, wind, snow, and fallen branches. That long-term report is rare for a tarp.
The trade-off is the D-rings themselves: the review summary notes mixed feedback, with a few owners reporting missing rings on multiple sides. That is worth a quick check when it arrives. The blue/brown reversible color is a nice touch, and at this thickness it is genuinely built for a boat, a tent base, or a back deck privacy wall.
Built for securing
- Reinforced D-rings hold better than standard grommets
- 14 mil thickness with 16×16 weave for tear resistance
- Proven longevity — years of outdoor wear in owner reports
Inspect on arrival
- A few units have arrived missing some D-rings
Choose this for: heavy-duty anchoring jobs where a pulled grommet means a ruined tarp.
Check carefully: give the D-rings a once-over when it arrives.
6. SpacEver 20×20 FT 16 Mil Heavy Duty Tarp
A 16 mil all-rounder that earns its keep in a pool, a truck bed, or a chicken coop.
This SpacEver is a genuinely thick 16 mil tarp with a tight 16×16 weave, and it is heavy — 8.99 kg of material that resists rocks, sticks, and the general abuse of outdoor life. Owners consistently praise the thickness, with one noting it is much thicker than expected and another using it to protect hot rods from rain. The polymer wear-resistant layer is meant to extend its service life.
It is made for multipurpose duty: boats, cars, outdoor furniture, grills, plants, construction zones, and chicken coops all get named in the product description. The four corners are reinforced, and the rust-proof grommets resist pulling. One experienced tarp user suggests using ball bungees at every stress point to keep the grommets from pulling out before their time.
The honest caveat here is durability feedback that goes both ways. While many owners find it heavy-duty and thick, a smaller share report the material shredding within a few months. That split is the deciding factor: if you need a fail-proof long-term cover, the 20 mil options above carry more proven track records, but for general heavy-duty work this is a strong mid-range performer.
Heavyweight protection
- Genuinely thick 16 mil material resists sharp objects
- Rust-proof grommets with reinforced corners
- Reversible design for two-sided use
The mixed report
- Some customers note shredding within months, others love it
Best if: you want near-premium thickness and the versatility of a true 20×20 sheet.
Consider the alternative: if a long-term outdoor cover is non-negotiable, the 20 mil picks have stronger durability records.
7. TARPAL 20×20 Feet Black 14 Mil Heavy Duty Tarp
The black 14 mil sheet that blocks heat and sunlight like a curtain.
This is the tarp for shade and heat control. The black color is not cosmetic — the double-sided film covering is designed to block ultraviolet (UV) rays and isolate heat transmission, so it suits shading garden plants or keeping summer heat off a patio. It blocks UV effectively, so it won’t easily bake brittle in the sun.
It is 14 mil thick and built from high-density polyethylene with anti-rust aluminum grommets every 17.7 inches. That tight grommet spacing, the same as the Best Overall TARPAL, gives you plenty of tie-down points. The corners and edges are reinforced with rubber inverted triangles for long-lasting strength, and the edges are heat-sealed to boost tear resistance.
Owners put it through real punishment — the review pages show it holding up in 70mph winds and keeping a porch desk dry. One used it to cover a sandbox and praised the water repellency and reinforced loops. The material is compact and smooth, with a higher density that resists tearing and wear. At 7.26 kg, it is a solid, heavy sheet that stays put once anchored.
Built for heat and wind
- Black surface blocks UV and isolates heat transmission
- Grommets every 17.7 inches for secure anchoring
- Held up in 70mph winds in owner testing
One thing to know
- Some owners wish it came in silver instead of black
Ideal for: anyone who needs shade, insulation, and a wind-proof cover in one sheet.
Not for: those who prefer a light-colored tarp that reflects rather than absorbs heat.
8. Xpose Safety 20′ x 20′ Ultra Heavy Duty Tarp
The 33.5-pound titan with a rope sewn right into the perimeter.
This is the most heavily built tarp on this list, and it is not close. At 20 mil thick and 33.5 pounds, it is the thickest large waterproof tarp the market commonly offers, backed by a 370 GSM 16×16 weave (GSM means grams per square meter, a density rating most tarps do not even list). The real standout is the 4mm rope sewn into the perimeter, giving the edges titan-like strength against tearing.
The brass grommets are spaced every 18 inches, and the corners are reinforced to handle serious stress. Owners have run it for a full year on a camper roof that gets beaten by sun every day, and it is still holding strong. Another kept it over a woodpile through a tough New England winter and says it is well worth the money. The white/brown reversible color is a nice premium touch.
At this thickness and weight, this is not a tarp you casually fold into a backpack. The weight gets mixed feedback in reviews — it is genuinely heavy — but that is the whole point. This is the tarp you buy once for a job that demands the strongest sheet money can buy, and the reinforced features mean it should outlast thinner alternatives.
Maximum toughness
- Thickest class: 20 mil with a 370 GSM weave
- Sewn-in 4mm rope makes edges nearly tear-proof
- Proven year-round durability on a sun-beaten camper
Expect the heft
- 33.5 pounds is genuinely heavy to handle and move
Pick this for: permanent or season-long covers where tearing is simply not an option.
Pass on it if: you need something portable — this one stays where you put it.
Understanding the Specs
Mil Thickness — The Number That Matters Most
The mil rating is how thick the tarp is, measured in thousandths of an inch. A 9 mil tarp is light and portable but will stretch, tear, or degrade faster under sun and snow. A 20 mil tarp is a heavy-duty shield that resists tearing and handles extreme weather, but it weighs significantly more and costs more. The right thickness depends entirely on what you are protecting and for how long.
Weave Count And Fabric Density
The weave count, written like 16×16, tells you how tightly the polyethylene fibers are packed per square inch. A higher weave count means a denser, stronger, more waterproof fabric. This matters because a loosely woven tarp will let water through and tear more easily at stress points. When a listing gives both a mil rating and a weave count, you are looking at a genuinely engineered tarp.
FAQ
What does the mil rating mean on a tarp?
Is a 20 mil tarp worth the extra weight?
What is the difference between grommets and D-rings on a tarp?
How long will a 20 ft tarp last outdoors?
Will a 20×20 tarp fit over my pickup truck bed?
What is the difference between a 10×20 and a 20×20 tarp?
How do I keep a large tarp from blowing away in the wind?
Are all ’20×20′ tarps actually 20 feet by 20 feet?
Final Thoughts: The Verdict
If you want one dependable pick, the 20 ft tarp winner is the TARPAL 20×20 20 Mil because it delivers the thickest protection with the tightest grommet spacing for a truly secure, weather-proof cover. If you want maximum tear resistance with a sewn-in rope edge, grab the Xpose Safety 20 Mil. And for the budget buyer who still needs real heavy-duty protection, the Kesfitt 16 Mil is the one to reach for.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of August 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
As an Amazon Associate, KitchPrep earns from qualifying purchases. This does not affect which products we feature.
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