Warehouse epoxy floor after King of Seal high-build seal — Sydney

OWNER-OPERATED · SYDNEY

Adam On Every Job

Owner-operated waterproofing, epoxy and spray crete across Sydney metro. You speak to me, you get quoted by me, and I'm on every site from grind to seal.

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Hand-poured metallic feature floor by King of Seal — Sydney

MEET THE OWNER

Adam — Director & On The Tools

Three years specialising in waterproofing, epoxy and spray crete across Sydney. Owner-operated means you speak to me, you get quoted by me, and I'm on every job.

  • 3 years specialising
  • Owner-operated
  • Sydney-wide service
  • $10M public liability

I came to this trade because I got sick of seeing what corner-cutting looks like a year later — peeled epoxy, leaking balconies, blown membranes that someone else now has to rip up. Prep is where the money should go, and that's where most contractors quietly skim. I diamond-grind every floor, I primer test, and I refuse to subcontract out the work that's got my name on the warranty.

If you call me, I pick up. If you book a quote, I'm the one walking your site, measuring up, and writing it. If you book the job, I'm there from grind to seal — same hands, same standard, every time. That's the entire pitch.

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$10M public liability NRMA insured
NSW licensed trades Number on quote
10-year product warranty Manufacturer-backed
AS 3740 + AS 4654 compliant Standards-aligned
Premium Australian systems Industry-leading suppliers
King of Seal — Sydney owner-operated waterproofing and epoxy crew

THE COMPANY

A Small Crew That Cares Like It's Personal

King of Seal is run by Adam, Director — a Sydney waterproofer and epoxy specialist who'd rather do every job himself than scale a team and water down the work. The business covers Sydney metro plus regular work in Wollongong, the Central Coast and South Coast NSW for larger remedial and commercial jobs.

Most jobs come from word of mouth. Strata managers tired of leaks coming back. Homeowners who wanted a garage they're proud of. Builders who needed someone reliable on a fit-out. Same response every time: turn up, do the prep properly, seal it once, hand over the warranty.

Most months are split fairly evenly between waterproofing (apartment bathrooms, balconies, planter boxes), epoxy floors (residential garages and commercial fit-outs) and decorative outdoor work (spray crete driveways and pool surrounds). Owner-operated doesn't mean small — it means accountable.

HOW IT WORKS

Four Simple Steps

No drawn-out sales calls. No vague pricing. Just a tradesman who quotes properly and turns up when he says he will.

  1. Day 1
    01

    Free Site Visit

    I come to you, take a proper look, measure up, listen to what you actually want, and tell you what's possible. No pressure, no hard sell. If a job isn't right for me — too small, wrong scope, better suited to a different trade — I'll say so on the spot rather than waste your time.

  2. Within 48hr
    02

    Honest Quote

    Clear written quote, itemised by area, materials and labour. No "from" pricing. The quote includes the specific product system, the prep method, the warranty terms, and the timeline. If anything changes on the day, I tell you before I touch it — never an end-of-job invoice surprise.

  3. Booked In
    03

    Prep & Protect

    Diamond grind or shot-blast, full vacuum extraction, crack repair, joint detailing, primer matched to the slab. Adjacent surfaces masked off. Dust controlled with negative-pressure extraction so the rest of your home or workspace stays usable. Prep takes longer than people expect, and that's the whole point.

  4. Handover
    04

    Seal & Finish

    Membrane or epoxy applied per system data sheet, top-coated for UV and wear, walked through with you so you can see what was installed and where. Warranty paperwork — manufacturer-backed product certificate plus my workmanship guarantee — emailed same day so you've got it on file before settlement, strata sign-off or insurance renewal.

THE TRADE EXPLAINED

Why Sydney Epoxy Floors Fail

I get called to fix other contractors' work more often than I'd like. Almost every time it's the same handful of mistakes — and almost every time, the homeowner had no way of knowing which corners were being cut at quote time. Here's what actually goes wrong, why it happens in Sydney specifically, and how I handle each one on every job.

Problem #1

Skipped surface preparation

This is where most failures live. Concrete out of the truck has a thin, weak top layer called laitance — basically the cement paste that floated to the surface during finishing. Epoxy bonded to laitance peels because the laitance itself peels off the slab underneath. The two ways to deal with it are mechanical grinding (correct) and acid-etching (cheap shortcut). Acid-etching pickles the surface, lifts a microscopic skin, and feels rough enough that contractors convince themselves it's prepped. It isn't.

Our fix

Diamond-grind every floor with a planetary grinder, two passes minimum, vacuum-shrouded for dust control. The slab leaves prep with the aggregate visible — that's the mechanical key the resin actually bonds to. No acid, no shortcuts.

Problem #2

Wrong product for the application

"Epoxy" isn't one product. There's water-based at the cheap end (thin film, low chemical resistance, fast install), solvent-based in the middle, and 100%-solids at the top (thick film, high build, no shrinkage). There are also separate top-coat chemistries — polyaspartic for UV stability and fast return-to-service, polyurethane for flex, basic clear for dry indoor floors that won't see sunlight.

Our fix

I spec to the job, not to a favourite brand. Indoor garages: 100%-solids epoxy build with polyaspartic top. Warehouses: high-build epoxy with industrial top. External pool surrounds: spray crete or UV-stable polyaspartic. The product comes after the assessment, never before.

Problem #3

No mechanical bonding to the slab

Concrete is porous. Some slabs are denser than others — power-trowelled commercial floors are notoriously hard to bond to because they've been polished smooth on the way out. Older residential slabs absorb resin like a sponge if there's no primer down first. Either way, you can't just bucket a build coat onto raw concrete and expect a 15-year floor.

Our fix

Slab-condition test on every quote — moisture meter reading, absorption check on a small ground patch. Primer is selected on the day of install based on what the slab actually needs.

Problem #4

Sydney humidity and UV — the silent killers

Sydney is brutal on coatings. Humidity during install is the first issue — pour epoxy on a wet-week morning at 88% RH and you'll get blushing, microbubbles, and a poor inter-coat bond. UV is the other issue — leave a clear coat of standard 100%-solids in direct sun and within 12 months you'll see ambering and chalking. AS 3740 governs the membrane system for internal wet areas; AS 4654 governs the external above-ground waterproofing.

Our fix

Reschedule install if humidity is out of spec. Every external floor gets a UV-stable top. Every quote ties to the relevant Australian Standard.

"If you don't get a return call today, you have your answer."

Talk to someone who'll actually call you back

12 REAL REVIEWS

What Sydney's Saying

Real reviews from real jobs across Sydney metro.

  • ★★★★★
    Two other waterproofers couldn't sort our balcony. Adam found the leak in twenty minutes, fixed it properly, and it's been bone dry for two seasons.
    Tom W.Wollongong · Waterproofing
  • ★★★★★
    Adam handled our strata balcony job from start to finish. Documentation was thorough, work was clean, and the committee had zero issues signing off.
    David K.Ryde · Strata waterproofing
  • ★★★★★
    Adam and the team at King of Seal did an amazing job on our metallic epoxy showroom floor. Looks unreal and completely changed the space. Great communication and super easy to deal with.
    Showroom ownerInner West · Metallic epoxy
  • ★★★★★
    Couldn't be happier with our epoxy garage floor. Adam was on time, professional, and the finish came out even better than expected. Highly recommend King of Seal.
    Hills District homeownerHills District · Garage epoxy
  • ★★★★★
    Great experience from start to finish. Adam kept everything simple, showed up when he said he would, and the Spray Crete finish looks fantastic.
    North Shore homeownerNorth Shore · Spray Crete
  • ★★★★★
    King of Seal did our waterproofing and epoxy flooring and the quality was excellent. Friendly team, clean work, and great attention to detail.
    Eastern Suburbs homeownerEastern Suburbs · Waterproofing + Epoxy
  • ★★★★★
    Absolutely love our custom metallic floor. Adam helped us choose the right finish and the result looks incredible. Great service and very professional.
    Chatswood homeownerChatswood · Custom metallic
  • ★★★★★
    Reliable, honest, and high-quality work. Adam was easy to contact directly and made the whole process stress-free. Would definitely use King of Seal again.
    Repeat clientSutherland · Multiple jobs
  • ★★★★★
    The team did a fantastic job on our commercial flooring project. On time, cleaned up after themselves, and the final result was spot on.
    Business ownerWestern Sydney · Commercial flooring
  • ★★★★★
    King of Seal transformed our garage with decorative epoxy flooring. Looks clean, modern, and high-end. Really happy with the workmanship.
    Inner West homeownerInner West · Decorative epoxy
  • ★★★★★
    Adam and his crew were great to deal with. Professional service, fair pricing, and excellent waterproofing work. Highly recommend.
    Strata clientEastern Suburbs · Waterproofing
  • ★★★★★
    Very impressed with the quality and finish of our epoxy floors. Adam communicated well throughout the job and delivered exactly what was promised.
    North Shore homeownerNorth Shore · Epoxy flooring

SERVICE AREAS

Sydney Metro & Surrounding NSW

From Inner West to Sutherland Shire, North Shore to Western Sydney. Free on-site quote anywhere across our coverage area.

Inner West Sydney

Terraces, warehouse conversions, and strata bathrooms across Newtown, Marrickville, and Leichhardt. Bathroom remediation and balcony waterproofing dominate the work I do here.

  • Newtown
  • Marrickville
  • Leichhardt
  • Balmain
  • Glebe
  • Annandale
  • Drummoyne
  • Rozelle
  • Petersham
  • Stanmore

Quote a job in the Inner West

Eastern Suburbs

Coastal homes with UV and salt exposure across Bondi, Coogee, and Maroubra. I spec UV-stable systems by default for balcony retrofits and pool surrounds east of the city.

  • Bondi
  • Coogee
  • Randwick
  • Maroubra
  • Paddington
  • Woollahra
  • Double Bay
  • Vaucluse
  • Bronte
  • Clovelly
  • Bellevue Hill

Quote a job in the East

North Shore

Heritage bathroom retrofits and new-build epoxy garages through Chatswood, Lane Cove, and Mosman. Decorative flake and metallic floors are the most common asks here.

  • Chatswood
  • Lane Cove
  • Mosman
  • Neutral Bay
  • Cremorne
  • Lindfield
  • Killara
  • Willoughby
  • North Sydney
  • Hornsby
  • Pymble
  • Roseville

Quote a job on the North Shore

Hills District

Large garages, double driveways, outdoor entertaining areas. Decorative flake epoxy garages, polyaspartic alfresco zones, and spray crete driveways.

  • Castle Hill
  • Baulkham Hills
  • Kellyville
  • Bella Vista
  • Norwest
  • Glenhaven
  • Rouse Hill
  • Beaumont Hills
  • Dural
  • Cherrybrook
  • Pennant Hills

Quote a job in the Hills

Sutherland Shire

Pool surrounds, alfresco areas, and sea-air corrosion-resistant systems across Cronulla, Caringbah, and Miranda. UV-stable systems and sealed spray crete by default.

  • Cronulla
  • Caringbah
  • Sutherland
  • Engadine
  • Miranda
  • Sylvania
  • Gymea
  • Kirrawee
  • Menai
  • Bangor
  • Loftus

Quote a job in the Shire

Western Sydney

Warehouse epoxy, retail fit-outs, food-grade sealed concrete across Parramatta, Blacktown, and Liverpool. Larger areas, longer jobs, scheduled around your trading hours.

  • Parramatta
  • Blacktown
  • Penrith
  • Liverpool
  • Bankstown
  • Auburn
  • Strathfield
  • Ryde
  • Castle Hill
  • Camden
  • Campbelltown

Quote a job out West

Beyond Sydney metro: also serving Wollongong & Illawarra · Central Coast · South Coast NSW for larger commercial and remedial jobs. Travel costs for jobs outside Sydney metro are quoted upfront and itemised separately so there are no surprises.

COMMON QUESTIONS

Sensible Answers

Universal questions on pricing, timelines, warranties, licensing and how I actually work. Service-specific FAQs (epoxy peeling, AS 3740 retrofit, spray crete pool surrounds, metallic vs flake) live on each dedicated service page.

How much does waterproofing or epoxy flooring cost?

Pricing depends on area, condition, prep required and finish. I don't quote "from" prices because they're misleading. Every quote is itemised by area, materials and labour after a free on-site visit, usually returned within 48 hours. The quote also lists the exact product system, the warranty terms, and the timeline.

More detail: epoxy cost factors · bathroom waterproofing factors

How long does the work take?

A standard residential garage epoxy is typically 2–3 days including prep and cure time. A bathroom waterproofing job is usually 1–2 days depending on the wet area size. Larger commercial projects are scheduled around your operating hours.

Do you offer a warranty?

Yes — up to 10-year manufacturer-backed product warranty on the leading Australian systems I install, plus my workmanship guarantee. Warranty paperwork is handed over the same day I finish.

Are you licensed and insured?

Yes. NSW trade licence and $10M public liability insurance, underwritten through NRMA Insurance. Documentation is available on request before any job — I send it through with the quote so you've got it in hand before we book in.

What's the difference between you and a multi-trade contractor?

Specialisation. A general builder might do a bathroom membrane every couple of months — I'm doing waterproofing or epoxy every working day. The systems change, the products change, the standards change. I also don't run a sales team or layered office of project managers — you call, I pick up, I'm at your site.

Which Sydney suburbs do you cover?

All of Sydney metro — Inner West, Eastern Suburbs, North Shore, Hills District, Sutherland Shire and Western Sydney. Free on-site quote anywhere within Sydney metro, no travel charge. For larger commercial or remedial jobs I also work down to Wollongong and the South Coast, and up to the Central Coast. The radius is roughly 150 km from the CBD for the right scope of work.

See the full service areas breakdown with region-specific notes.

What products do you use?

Manufacturer-backed systems only — premium Australian-made waterproofing and epoxy products from established suppliers. The right product depends on the substrate, exposure and finish, so I spec to the job rather than carrying one favourite. Each manufacturer's data sheet specifies coverage rates, primer compatibility, cure windows and warranty terms — and I follow those exactly. Mixing products across systems voids the warranty and is how floors fail at the inter-coat bond, so each job stays inside one manufacturer's family for the membrane or coating layer that matters.

Service-specific answers

Waterproofing FAQs Epoxy FAQs Spray crete FAQs

Ready to talk to Adam?

Free on-site quote. Sydney metro, no travel charge.

  • Licensed waterproofer (NSW)
  • Specialist in epoxy & waterproofing
  • Free on-site quotes Sydney-wide
0485 002 681 Get a quote
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