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Shark S3501 review

A sub-five-pound steam mop with double-sided pads, 30-second steam and a named 99.9 per cent bacteria claim.

Where this ends up Double-sided pads, so two pads give four cleaning surfaces — the most cleaning per wash on this shelf. It reaches steam in thirty seconds, weighs under five pounds, and its tank is filled from a flask rather than removed.

What the maker puts in writing

  • “STEAM SANITIZATION: Removes 99.9% of common household bacteria* with the power of steam, using just water.”
  • “DUAL-SIDED CLEANING: Flip the mop head to clean using both sides of our double-sided pads, extending your cleaning session with fewer washes.”
  • “LIGHTWEIGHT DESIGN: At under 5 lbs., the compact design makes it effortless to carry between rooms”
  • “QUICK START CLEANING: Starts steaming in as little as 30 seconds”
  • “USE ON ALL SEALED HARD FLOORS: Designed to clean across all sealed hard floors including hardwood, marble, tile, stone, laminate, and vinyl.”
  • “WHAT’S INCLUDED: 1x Shark Steam Pocket Mop, 1x Filling Flask, 2x Washable Double-Sided Microfiber Pads”
  • Footnote: “Demonstrated to be effective against Pseudomonas aeruginosa, Staphylococcus aureus, Escherichia coli, Salmonella enterica (typhi), and Klebsiella pneumoniae when used as directed.”
  • Reference S3501 · Catalog: 2209 g (77.9 oz)

Four cleaning surfaces from two pads

“Flip the mop head to clean using both sides of our double-sided pads, extending your cleaning session with fewer washes.”

Two pads with two faces each is four cleaning surfaces, and nothing else on this shelf works that way.

this — 2 double-sided pads = 4 surfaces, 2 things to wash Shark S8001 and S8201, $159 each — 4 single-sided pads = 4 surfaces, 4 things to wash Shark S1000, $69.39 — 2 single-sided pads = 2 surfaces NEWBULIG, $37.89 — 2 pads

Why it matters more than it sounds: a steam mop pad stops working long before the floor is done. It fills with the dirt it has lifted, and a saturated pad begins spreading what it was collecting — which is the commonest reason a steam-mopped floor dries streaked.

Being able to flip the head halfway across a room, without going to find a clean pad, is the difference between finishing properly and finishing with a grey pad.

The pads are Dirt Grip microfibre, “that lift and lock in dirt and grime”, and machine washable. The honest limit: four surfaces is still four, and they all go in the same wash. A large house wants more pads whatever machine you buy.

Thirty seconds, and the division this shelf is built on

“Starts steaming in as little as 30 seconds.”

It can do that because it is not heating a tank. A steam mop holds cold water in a reservoir and drips it onto a hot block at the head, flashing it to vapor as it passes. There is almost nothing to warm up.

The Shark S1000 publishes the same figure. The other architecture on this shelf publishes very different ones:

Schenley, $139.99 — “Fast 8-Minute Heat-Up” for a 45.5 fl. oz. tank. And the arithmetic supports it: bringing about 1.35 liters to the boil takes roughly 0.45 megajoules, which at 1500 W is about five minutes. Eight is conservative, not slow. Keenstone, $139.99 — no heat-up figure, but the sentence nobody else writes: “when refilling, allow the unit to cool for 20 minutes before adding water.” Phueut, $119.64 — “heats up quickly”, no figure. HJGJYWLQ, $591.99 — “Fast Heating”, no figure.

What you give up for the thirty seconds is pressure. An unpressurized mop cannot drive steam into a grout line the way the Keenstone claims to at 58 psi.

So the choice is thirty seconds and no pressure, or eight minutes of heating and twenty minutes of cooling before a refill. For a kitchen floor on a weekday evening, thirty seconds is the right trade — and it is why this machine and the S1000 are the two on this shelf you would actually use twice a week.

Sealed hard floors, in capitals

“USE ON ALL SEALED HARD FLOORS: Designed to clean across all sealed hard floors including hardwood, marble, tile, stone, laminate, and vinyl.”

All four Shark machines on this shelf carry that bullet, capitalized, and the word that matters is sealed.

On unsealed or waxed timber, steam swells the fiber and raises the grain, and it strips wax. On unglazed stone or terracotta, it soaks in. On laminate with open seams, it gets under the surface layer and lifts it. On unsealed grout, it erodes.

Steam does all of that faster than a wet mop, because it carries far more energy per gram.

And the cheapest machine on this shelf says the opposite. The NEWBULIG at $37.89: “Safe for all floors: hardwood, tile, laminate, stone & grout lines.” The same list of materials, without the word. Nothing about that machine makes it gentler — it is unpressurized steam at a published 212 °F, the same kind of heat this produces.

The Schenley, Keenstone, Phueut and HJGJYWLQ do not raise the question at all.

The cheap test before steaming a whole room: a drop of water on an inconspicuous joint, and watch whether it beads or soaks in.

The sanitization claim, and the footnote that makes it mean something

“Removes 99.9% of common household bacteria with the power of steam, using just water” — and in the small print, “Demonstrated to be effective against Pseudomonas aeruginosa, Staphylococcus aureus, Escherichia coli, Salmonella enterica (typhi), and Klebsiella pneumoniae when used as directed.”

Naming five organisms is a much stronger statement than the number on its own, because it says what was counted.

The same footnote appears on the Shark S8201, and the S1000 carries the same chemical-free sanitization claim.

The rest of the shelf:

Schenley — “compliant with EPA standards… up to 99.9% of common household bacteria”, no organism named Shark S8001, $159.99 — sanitizes, with a long footnote about controlled test conditions, and no percentage at all NEWBULIG — “remove 99.9% tough stains” — the same number applied to stains, which have no unit and nothing to count Keenstone, Phueut, HJGJYWLQ — no figure

Two qualifications the footnote makes itself, and they are fair: “when used as directed”, and “Sanitization studies were conducted under controlled test conditions”. Both point at the same practical requirement — dwell time. Heat has to stay on the surface long enough to do the work, which means moving slowly rather than briskly.

“Using just water” is the other half of the argument, and it is the genuine case for steam over a spray. There is no consumable: no bottle to replace, nothing to rinse off, and nothing left behind on a floor a child or a dog is going to be on. The Phueut and Schenley both lead on the same point; the NEWBULIG calls it “safe for… loved ones”.

Under five pounds, and a swivel

“At under 5 lbs.” The catalog records 2209 g, which is 4.9 lb — so the claim holds.

Against the shelf:

Shark S1000 — 2087 g, also “under 5 lbs.” this — 2209 g NEWBULIG — 2341 g Shark S8001 — 3130 g Phueut — 3447 g Schenley — 3629 g Shark S8201 — 4042 g HJGJYWLQ — 11489 g gross

So this and the S1000 are the two lightest machines here, and the two $159 Sharks are 40 to 80 per cent heavier for the rotating head and the bigger tank.

Weight is the specification that decides whether a mop gets used. Five pounds carries up a staircase one-handed; nine pounds is a decision.

“Swivel steering” is claimed without a figure — the NEWBULIG publishes “180° left/right, 90° forward/backward”, which is the only numbered swivel on this shelf. What swivel buys is the ability to put the head flat under a kickboard or around a chair leg without turning your whole body.

The filling flask, which tells you the tank does not come off

“1x Filling Flask” in the box, and no removable tank claimed anywhere on this page.

That is the real difference between this and the Shark S1000 at $69.39, which makes a bullet of it: “REMOVABLE WATER TANK: The removable water tank allows easy fills and refills.” Both $159 Sharks have one too.

A flask means you fill a jug at the tap and pour it into the machine. A removable tank means you take the tank to the tap. The second is less messy and faster, and it is most of what the extra ten dollars buys.

“XL Water Capacity” is claimed in the feature list with no figure — which is the case on all four Sharks here. The canisters publish theirs: the Keenstone 51 oz, the Schenley 45.5 fl. oz., the Phueut 1.5 L, the HJGJYWLQ 3.5 L.

What is not published

No temperature, and no pressure, on any of the four Sharks here. The Keenstone publishes 300 °F at 58 psi, which is the only consistent pair on this shelf: 58 psi is about 5 bar absolute, where saturated steam sits near 306 °F. The Schenley’s 248 °F at 3.5 bar and the HJGJYWLQ’s 110 °C at 4.0–5.0 bar are each internally inconsistent. The NEWBULIG’s 212 °F with no pressure is correct for an unpressurized mop — and this machine is the same kind, so 212 °F is the sensible expectation here too.

No tank capacity, as above.

No cord length. The S1000 publishes 18 ft, the NEWBULIG 16.4 ft, the Phueut 9.8 ft. “The long power cord gives you a wide cleaning radius” is the whole of what is said, and cord length is what decides whether a room is done from one socket.

No wattage.

No steam modes, where the S8001 and S8201 have three — “Light, Normal, Deep” — and the Schenley two trigger settings, and the Phueut an adjustable control on the handle with a lock. This has one setting.

No attachments. It is a floor machine. The Phueut ships 28 accessories, the Schenley 21, the Keenstone 17, the NEWBULIG 14 plus a detachable handheld.

No safety features published, where the NEWBULIG has anti-dry-burn with a sound, an auto-shutoff and a red light, and the Keenstone a steam child lock and a cap that stays locked while pressurized.

No warranty. The Keenstone’s two years is the only term on this shelf, and its UL499 the only certification.

Availability

Read on the day this page was built: $59 at the American Amazon shop.

Read from Keepa on the day this page was last revised; stock and price both move without notice.

Prices quoted in this text were read on 2026-10-05. The live price is at the top of the page.

What it does well, and badly

Strengths

  • Four cleaning surfaces from two pads, which is the most cleaning per wash here
  • Steam in thirty seconds, against eight minutes on the pressurized machines
  • The only sanitization claim on this shelf that names the organisms it was demonstrated against

Compromises

  • The tank is filled from a flask rather than removed, where the S1000 ten dollars above has a removable one
  • No cord length published, where the S1000 gives 18 feet
  • No temperature, no pressure, no tank capacity and no attachments

Specifications

PadsTwo double-sided — four cleaning surfaces, the most per wash on this shelf
Heat-upAs little as 30 seconds
WeightUnder 5 lb; the catalog records 2209 g (77.9 oz)
The 99.9% claimCommon household bacteria, with five organisms named in the footnote
SteeringSwivel
FloorsSealed hard floors only — stated in a dedicated capitalized bullet
Water tankFilled by flask, not removable — see the FAQ
In the boxThe mop, a filling flask and two double-sided pads
CordLong, with no figure published
ConsumableNone — water only, no chemicals
TemperatureNot published, as on all four Sharks here
PressureNot published
Tank capacityDescribed as XL, with no figure
AttachmentsNone — it is a floor machine
WarrantyNot published
Amazon referenceB0028MB3HM
EAN0622356525978

The questions we hear

What do double-sided pads actually gain me?

Twice the cleaning between washes, and it is the one thing this machine has that nothing else on the shelf does. Bullet two: "Flip the mop head to clean using both sides of our double-sided pads, extending your cleaning session with fewer washes." Two pads with two faces each is four cleaning surfaces. The Shark S1000 at $69.39 ships two single-sided Dirt Grip pads — two surfaces. The S8001 and S8201 at $159 each ship four single-sided pads, so four surfaces but four things to wash. The NEWBULIG at $37.89 ships two. Why it matters in practice: a steam mop pad stops working long before the floor is done. It fills with the dirt it has lifted, and a saturated pad starts spreading what it was collecting — which is the commonest reason a steam-mopped floor looks streaked. Being able to flip the head mid-room, without stopping to find a clean pad, is the difference between finishing a floor properly and finishing it with a grey pad. The honest limit: four surfaces is still four surfaces, and all of them go in the wash together. If you clean a large house you will want more pads whichever machine you buy.

Thirty seconds — how does it heat that fast when a rival takes eight minutes?

Because it is not heating a tank, and this is the real division on this shelf. A steam mop holds cold water in a reservoir and drips it onto a hot block at the head, flashing it to vapor as it goes. There is almost nothing to warm up, so "starts steaming in as little as 30 seconds" is believable — the Shark S1000 publishes the same figure. A pressurized canister does the opposite: it heats and pressurizes a whole tank before anything comes out. The Schenley at $139.99 publishes "8-minute heat-up" for a 45.5 fl. oz. tank, and the arithmetic supports it — bringing about 1.35 liters to the boil takes roughly 0.45 megajoules, which at 1500 W is about five minutes, so eight is conservative rather than slow. What you give up for the thirty seconds is pressure. An unpressurized mop cannot drive steam into a grout line the way the Keenstone at $139.99 claims to at 58 psi — and the Keenstone also publishes the cost of a pressure vessel in a sentence nobody else writes: "allow the unit to cool for 20 minutes before adding water." So: thirty seconds and no pressure, or eight minutes and twenty minutes of cooling before a refill. For a kitchen floor on a weekday evening, thirty seconds is the right trade.

Is the 99.9 per cent claim meaningful?

It is the most specific one on this shelf, because the footnote names what it was demonstrated against. Bullet one claims it "Removes 99.9% of common household bacteria with the power of steam, using just water", and the small print says: "Demonstrated to be effective against Pseudomonas aeruginosa, Staphylococcus aureus, Escherichia coli, Salmonella enterica (typhi), and Klebsiella pneumoniae when used as directed." Naming five organisms is a far stronger statement than the number alone, because it says what was counted. The same footnote appears on the Shark S8201, and the S1000 carries the same chemical-free sanitization claim. Compare the rest of the shelf. The Schenley says "compliant with EPA standards... up to 99.9% of common household bacteria" and names no organism. The Shark S8001 at $159.99 sanitizes, with a long footnote about controlled test conditions, and publishes no percentage at all. And the NEWBULIG at $37.89 claims "remove 99.9% tough stains" — the same number applied to stains, which have no unit and nothing to count. Two qualifications the footnotes make themselves, and they are fair ones: "when used as directed" and "Sanitization studies were conducted under controlled test conditions". Both point at the same practical requirement — enough dwell time on the surface, which means moving slowly.

Set beside the neighboring cleaning machines

cleaning machines from the same category, at nearby prices. Only what all of them publish is shown: a column with holes compares nothing.

Model Price WeightCordTemperaturePressure
Shark S3501 $59 Under 5 lb; the catalog records 2209 g (77.9 oz)Long, with no figure publishedNot published, as on all four Sharks hereNot published
Shark S1000 $60 Under 5 lb; the catalog records 2087 g (73.6 oz) — the lightest of the American machines here18 ft — the longest published on this shelfNot published, as on all four Sharks hereNot published
NEWBULIG AS-ZTB24SC-BKPK-SY $38 2341 g (82.6 oz)16.4 ft, which is 5 meters (16 ft) exactly212 °F — which is exactly boiling point at atmospheric pressure, and consistent with an unpressurized mopNone claimed, correctly
Phueut Not stated by the maker $105 3447 g (121.6 oz)9.8 ft, which is 3 meters (10 ft), plus an extra-long hoseNot publishedNot published, though "high pressure" is claimed

Where the models are not equal, in cleaning machines

  • If price decides: NEWBULIG AS-ZTB24SC-BKPK-SY, at $38.

Price and availability, for cleaning machines

Details checked on October 5, 2026.

Who this one is for, among cleaning machines

Sealed hard floors in a small home, where thirty seconds and a light machine matter most

What buyers actually choose

Amazon reports what buyers took in the month before this page was last checked: at least 7,000.

The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.

Sources

Specifications: the manufacturer sheet for cleaning machines and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.

How these cleaning machines are assessed here