8 Best 16 Mil Solar Pool Cover | Cuts Heat Loss, Adds Swim Weeks

Check Price on Amazon

A small round cover that pays for itself by trapping serious heat in sunny climates.

For a 12 ft round pool, this Abimars cover packs the same 16 mil thickness into a compact footprint that fits without trimming. The polyethylene is reinforced with 5% UV protectant and 3% HALS light stabilizer, which is a compound that slows sun damage — together they deliver UPF 50+ protection, so the plastic resists degrading under intense sunlight.

The value story here is the standout. One California owner with a 1200-gallon spa found it raised the water 5-8°F on 80°F days and cut roughly a month off heater costs. In Florida, owners mention the pool climbed from 82°F to 90°F in two weeks of sun. The dense 9mm bubbles and anti-curl edges cut evaporation by 97%, so you refill less often.

Sizing is the honest caveat: at 144″ x 144″ it is a genuine 12 ft round cover, which is a full 33% smaller on each side than the 16 ft round UIRWAY below, so it only suits small pools. A few owners note it is slightly pricier than flimsier alternatives, but the thicker gauge is exactly why they expect it to last several seasons.

Check Price on Amazon

A 16 ft round cover with extra-large bubbles that trap heat and survive the season.

Round pool owners get a strong middle-ground option here. The UIRWAY uses a 16 mil polyethylene film with what the maker calls a “hamburger” shaped bubble structure — larger air pockets that hold warmth against the water surface. The result is solid temperature retention, with owners noting it keeps the pool warm and speeds up heating on sunny days.

Durability is where this one converts skeptics. One owner had a thin cover the year before that ripped every time it was touched, and switched to this precisely because the 16 mil build feels thick enough to take on and off without tearing. It also cuts evaporation by up to 97% and floats directly on the water, so setup is just unroll and trim.

The trade-off is weight and handling. Owners describe it as bulkier than thinner covers, which is a sign of the durability you are buying, but it makes solo removal harder. At 192″ x 192″ it is a full 33% bigger per side than the 12 ft round Abimars above, so be sure your pool is truly 16 ft across before ordering.

Check Price on Amazon

The oval-specific cover that fits snugly and keeps heat in, made for above-ground pools.

If you have an oval above-ground pool, this In The Swim cover is shaped for your water from the factory. At 15 x 30 ft with 16 mil polyethylene and wide welded seams, it is built for tear resistance and long seasonal use, and the 25-pound weight is the lightest of the full-size covers here, which makes it noticeably easier to roll on and off.

Owners find it fits an oval pool perfectly and retains heat well when paired with a heater. The silver Ultra Silver finish and opacity help with a couple of side benefits: it cuts evaporation and chlorine loss significantly, and The opaque design blocks more sun from breaking down chemicals, which some owners prefer over clear covers.

The honest fit-note is that temperature retention gets mixed feedback. Some owners say it holds water warm through cool nights, while others report it does not actively heat the water and the gain falls short of the claimed 18°F. It is best treated as a heat-retention blanket, not a solar heater — and one owner found the 25 lb build heavy and bulky when removing it.

Check Price on Amazon

A heavy-duty rectangle cover that holds overnight heat after cold snaps.

For a 16 x 32 ft inground rectangle pool, the VINGLI is all about the bubble core. The transparent blue cover absorbs heat through thousands of bubbles during the day and releases it into the water, and the strong welded seams add tear resistance where thin covers usually split first.

The overnight numbers tell the story. One owner watched the pool sit at 75°F through a day when temperatures dropped to 40°F at night, and the water only lost 3 degrees by morning — exactly the kind of heat retention a 16 mil cover should deliver. Another saw the pool climb as high as 8-9°F over about a week in 75-78°F weather, which is strong solar gain for a cover in this class.

The main gripe is sizing accuracy. One owner with an 18 ft pool found the 16 x 32 cover had extra material folded over the sides, so measure your water surface carefully before ordering. It is also genuinely heavy — the thickest-feeling build in its class — which most owners read as a durability plus, though it means a reel makes daily handling much easier.

Check Price on Amazon

The American-made rectangle cover that heats pools an extra 8 degrees for less.

Shop Square’s 16 x 32 ft rectangle cover delivers the same 16 mil thickness as the premium options at a friendlier price, and it is Made in the USA. The heavy-duty build earns consistent praise for quality, and the heat retention is proven: customers note the cover warmed their pool an extra 8 degrees, with one above-ground Intex 12 x 24 pool getting so hot in a southern summer it was “hotter than bathtub water.”

At 30 pounds it is the mid-weight option in this group, and owners find it manageable for two people to fold and remove — one noted it is “not too heavy for two to handle.” It rolls up with reasonable effort, which matters if you are covering and uncovering the pool regularly.

The honest caveat is that thickness feedback runs mixed. Most owners call the 16 mil material thick and the best-made cover they have owned, but a few describe it as thin and flimsy, so there is some manufacturing variance to expect. The trade-off for the value pricing is that durability over multiple seasons is still unproven for early buyers.

Check Price on Amazon

A thick rectangle cover for big pools that needs careful handling to last.

For a full-size 16 x 32 ft inground pool, this In The Swim cover brings a thick 16 mil polyethylene build with wide seams and an extra-long 8-year manufacturer warranty. The thickness is the most-praised feature — owners consistently note it is thicker than most covers they have tried, and that same thickness keeps water from losing about 5 degrees overnight, even on windy days when thinner covers would fly off.

The long warranty reflects the maker’s confidence, but owner experience is genuinely split on longevity and heating. Some reviewers point out the thick material heats the pool nicely and holds warmth through chilly nights, while others say it did not warm the water at all. The durability picture is the bigger caution: a few shoppers say bubbles popping after about 2 years even with low chlorine, and one saw the cover fall apart within a single season.

At 34 pounds, this is the heaviest rectangle cover in this lineup, and it is easy to cut to fit around ladders and steps.

Check Price on Amazon

An oversized cover for the biggest pools, raising water up to 15 degrees.

If you have an extra-large 18 x 36 ft rectangle pool, the Sun2Solar is the biggest cover in this lineup and it’s built from a durable resin material that withstands intense sun without warping or fading. The maker claims it raises pool temperature by up to 15°F, and buyers report gains like 79°F to 82-84°F and 66°F to 76°F in the first week.

Heat retention is the top praise, and it pairs with strong evaporation control — The thousands of tiny bubbles form a barrier that prevents up to 95% of water loss, so you refill less often. Owners also appreciate how easy it is to cut into a custom shape, and the resin material holds up well against weather.

The honest sizing note is that a few owners received a cover larger than ordered, and some found the material thinner than expected for a 16 mil rating. At this oversized footprint, it is simply not a cover for small pools — it is built for the largest rectangle footprints, and daily handling benefits from a reel.