Used by mechanics in 14 countries

10 reasons mechanics are ditching Swarfega for a bar of Irish soap

Made in Dublin. Cold-processed, 50 bars at a time. Hand-cut, hand-labelled, and tough enough to lift engine oil without wrecking your hands.

Literally covered in sh1t 😂 the coarse grit is class and actually lifts oil from skin every bit as well as industrial Swarfega-style soap. ✓ Verified Steven, Ballymoney, NI · Mechanic & part-time farmer
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How it stacks up against what you're using now

TBS Rough Bars Swarfega Lynx / shower gel
Lifts grease + engine oil One wash, no scrubbing mitt Yes, but harsh No
Your skin by Friday Soft, no cracking Dry, raw, cracked Stripped + perfumed
Smell Tar, peat, citrus, stout Industrial solvent Synthetic fragrance
Made by 35 people in a Dublin workshop Industrial chemical co Multinational
Cost per shower ~30p Comparable Comparable
Bathroom afterwards smells Like a forest or a pub Like a workshop Like a teenager

10 reasons to make the switch

Reason 1

It lifts the grease. First wash.

The grit does what shower gel can't — a proper clean at the end of a shift, no scrubbing mitt needed.

The coarseness of this soap does what normal shower gel does not and leaves me fully clean at the end of my day. My partner appreciates the white bed sheets staying white. Patrick, mechanic, Doncaster
Reason 2

Pine tar — what your granda used on an axle.

Real ingredient, real history. The bars actually contain pine tar. It's not a marketing claim, it's on the label.

Reason 3

Rough enough to work. Soft enough not to wreck your hands.

Swarfega solves the grease and creates a skin problem. This solves both. The grit is real grit — oat, charcoal, pumice — not synthetic microbeads.

Reason 4

No synthetic fragrance. No 'Sport Blast'. No bullshit.

Every scent is essential-oil based. If you've grown out of smelling like a 16-year-old, this is what you graduate to.

Reason 5

Made in Dublin. Cold-processed, 50 bars at a time.

Hand-cut, hand-labelled by 35 people in a Sandyford workshop. Not a production line in a factory you'll never see.

Reason 6

Cured 3–4 weeks, so a bar actually lasts.

The long cure makes the bars far harder than typical handmade soap. You get 21+ showers out of one — it won't turn to mush in the dish.

Reason 7

Ships from your side of the water.

Warehouses in Ireland, the UK, the USA and Canada. Your order goes out from whichever one is closest — no three-week wait from abroad.

Reason 8

If your first scent's not a hit, we replace it free.

The First Scent Guarantee. No questions, no returns to post back. We just sort you out.

Reason 9

Made by a lad who started in his kitchen.

John started this alone during lockdown in 2021. It's still founder-led — he reads the reviews and answers customers himself.

Reason 10

Not a lab. A workshop.

Real people on living wages, real ingredients you can pronounce, and a 14,000-strong community who'll tell you straight if it's any good.

What the lads actually say

★★★★★

Beats Swarfega hands down. Extremely effective at cleaning hands heavily contaminated with oil — and at the same time gentle enough for the most sensitive skin, without irritation or burning.

Andrew Harney, Manchester
Verified Customer
★★★★★

As a man that works in a dirty environment, the soap is unreal for cleaning even the toughest of grease and grime. Smells amazing and lathers perfectly.

Scott, Newtownards
Verified Customer
★★★★★

The grit in the Atlantic Pine Tar works great for getting rid of all the grease, dirt and coal dust I usually get covered with at work.

Jay, Cranbrook BC, Canada
Verified Customer
Made by a Dublin lad. Used by mechanics in 14 countries.

I started this in my kitchen in January 2021. No lab, no marketing department — just bars I'd actually use myself. Five years on there's 35 of us in a Sandyford workshop turning out about a million bars a year, still cold-processed 50 at a time. If the first bar you try doesn't become your new favourite, we replace it free. That's the deal.

— John, Founder, The Black Stuff

Straight answers

Will it actually shift engine oil and grease?
Yes. The coarse bars — Atlantic Pine Tar especially — are built for it. Real grit, no scrubbing mitt needed.
How long does a bar last?
21+ showers with daily use. Our 3–4 week cure makes them much harder and longer-lasting than typical handmade soap.
What if I don't like a scent?
First Scent Guarantee — we'll replace it free, no questions asked, no returns needed.
Where does it ship from?
Ireland, UK, USA & Canada — we ship from whichever warehouse is closest to you.
Is this just for mechanics?
No — it's for anyone whose hands come home dirty. Welders, farmers, anglers, gardeners. If shower gel isn't cutting it, this will.