The world's first separating sealing toilet.

PREORDER

S1 Dry Flush Sealing Toilet showing the internal sealing mechanism

Inside view of the S1 Dry Flush Sealing Toilet

S1 Sealing Toilet waste divider separating solids and liquids

S1 Sealing Toilet battery-powered heat sealing system

Easy disposal of sealed waste bags from the S1 Sealing Toilet

S1 Dry Flush Sealing Toilet

$1,500.00

The S1 is available for Pre-Order only. New orders are estimated to ship end of August 2026.

The S1 is the world's first separating, heat-sealing toilet. Push a button and solids and liquids never touch, never smell, never see the light of day. No composting. No layering. No "eww" moment. Just clean, off-grid living.

Urine-diverting = Odor-free: liquids and solids never meet. No sewage. No smell.
Automated heat-seal: push a button and solids are cleanly sealed in a bag. No manual wrapping. No exposure. No "eww" moment.
Only bag what you need: because solids and liquids are separated, you're not sealing a bag full of liquid waste — fewer bags used means less spent on refills.
20+ seals per charge: rechargeable Li-ion battery powers the sealer.
Waterless and chemical-free: no blue juice, no enzymes, no plumbing. Just separate, seal, and go.

What's in the box?

S1 Dry Flush Sealing Toilet
Manual
Sealing Unit
Solids Bin
Urine Bottle with one-way valve
12V Wall Adapter
Compostable Bag Liner
High Barrier Bag Liner
Battery Box
Bag Pusher

Technical Specs

Dimensions: D X W X H: 17.0" x 15.2" x 16.5"
Solids Container Capacity: 1.5 gallon (15.7 liter)
Urine Bottle Capacity: 1.7 gallons (6.4 liter)
3S2P Li-ion battery - max 12.6V
LED Urine Level Indicator: An LED light alerts users when the urine bottle is full.
Material Composition: ABS plastic body, stainless steel hinges, waterproof connectors
Weight: Approx. 29 lbs (13.2 kg)
Portability Features: Sturdy side handles for effortless transport

Delivery & Returns

Delivery
Free shipping on orders over $150 in USA 48 and Canada.

Canadian orders ship from our 3pl in Canada.

Deliver Time is estimated 3-5 days depending on location. We use UPS ground at standard in USA - No PO Boxes.

Returns
No problem if you change your mind! We make returns super easy by covering the cost and offering a refund within 30 days of receiving your toilet, as long as you haven't used it and return it in the original packaging.
A restocking fee may apply see our return policy.

Return Policy

Bamboo Seat Cover

$125.00

S1 12V Vehicle Charging Kit

$25.00

2-Pack S1 Bag Liner Refills

$35.00

Title

4.8/5 . 200+ Reviews

2-year warranty

30-day free returns

Title

Specifications at a glace.
How-To Videos
Manuals

Weight

29 lbs / 13.2 kg

Urine capacity

1.7 gal / 6.4 l

Battery

12V Li-ion, rechargeable

Seals per charge

50+

Flushes per roll

~25

Refill cost

~$15-20 / roll

Body

ABS plastic · steel hinges

LED indicator

9V battery (Not included)

Water required

Warranty

2 Years

Chemicals required

None

Shipping

August 2026

S1 User Manual

Separate

Heat Seal

With the push of a button the automatic sealing mechanism hygienically seals solid waste

Hassle Free Disposal

The S1 seals each #2 in a small bag, making it easier to empty whenever you want.

Super Simple

Four steps easy steps.

1. Sit & go normall

Urine diverts automatically into the sealed bottle. Solids drop into the extra-large drop zone onto the bag cartridge.

2. Tap to seal

A single press triggers the battery-powered heat sealer. Waste is wrapped, sealed, and out of sight — in seconds.

3. Empty urine when LED lights

The LED indicator tells you when the 1.7-gallon bottle is full. Opaque bottle — discreet to carry and empty.

4. Swap Liner as needed

One liner roll = ~25 flushes. When empty, drop in a fresh one. Recharge the battery — 50+ seals per charge.

Backup mode: If you ever run out of liners, the S1 keeps working — it simply operates as a standard urine-diverting toilet until you get more. No being stranded. No chemical additives. Ever.

Why People Choose
S1 Sealing Toilet Over Other Dry Flush Toilets

Other Dry-Flush Toilets

Only Dry Flush designed to separate liquids naturally, no extra bucket

Choice of compostable or recycled-plastic bags

Up to 25+ flushes per bag liner

Up to 80% less bag waste

Built in backup if bags run out — still works as a diverting toilet

The Perfect Balance of Comfort and Freedom

RV & Motorhomes

Tiny Homes

Boats

Campervans

Off-Grid

Home Use

Traditional dry-flush toilets bag every single use — liquid and solid together. You burn through expensive proprietary refills fast, and you're effectively paying to seal urine in plastic. The S1 diverts liquid into a separate 1.7-gallon bottle and only seals solids. That's up to 80% less bag use, dramatically lower running costs, and far less plastic waste. It's the first dry-flush toilet with urine diversion built in.
The S1 uses two separate batteries: one for the sealing mechanism and one for the urine level indicator.
1. Sealing mechanism battery
The sealing mechanism runs on the included rechargeable Li-ion battery.
- Charging: Connect the supplied 12V power supply unit (Input 100–240VAC, Output 12VDC/2A) to the power input socket at the back of the toilet.
- Powering on: Use the power switch on top of the battery box.
Safety warnings
- Fully charge the battery before first use.
- Only use the CompoCloset-approved charger.
- Do not connect the power input directly to a source exceeding 12.6V, such as a vehicle alternator or a LiFePO4 battery. For those, use the CompoCloset Li-ion 10–24V DC charger. [See Here]
2. Urine level indicator battery
The indicator light needs its own 9V battery, which is not included.
- Installation: Remove the two screws on the battery box and fit a fresh 9V battery.
The heat-sealing mechanism runs on an internal rechargeable 12V Li-ion battery — good for 50+ seals per charge. Designed to trickle charge off of 12Vs. Comes with plug. The LED urine indicator runs separately off a 9V battery (9V battery not included).
Each liner roll gives ~25 uses. For 2 people with regular use, that's roughly every 1–2 weeks. Swap takes under a minute — no tools, no mess. Refills are available on CompoCloset.com and Amazon Prime.
The bottle holds up to 20 liquid uses — roughly every few days for 2 people. The LED indicator tells you when. Empty is super easy with a separate urine bottle.
Good news — you don't need to buy the full S1. The S1 Dry Flush Adapter Kit converts your existing Cuddy or Cuddy Lite into a sealing toilet. Plug-and-play, no permanent modifications required.
The S1 has a built-in backup mode — it converts to a standard urine-diverting toilet if you run out of bag liners. You're never left without a working toilet.

Separate. Seal. Go.
This is the S1.

Shipping August 2026 · 30-day returns · 2-year warranty · Free shipping to continental US & Canada

The world's first separating sealing toilet. Designed with our community, for our community.

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The world's first separating sealing toilet.