Quick Answer: Epoxy floor coating for shipping containers in Ontario seals the original marine-plywood deck with a chemical-resistant resin film, usually 100% solids epoxy at 10-15 mil dry film thickness over a primer, finished with a urethane topcoat. Building-science guidance from the National Research Council of Canada on coating wood substrates underlines the same point our yard sees daily: properly prepped and applied, the system lasts 15-20 years inside a sealed bin.
In This Guide
- Why Coat a Container Floor Instead of Replacing It?
- What Are the Layers in an Epoxy Floor Coating System?
- How Do You Prep an Ontario Container Wood Deck for Epoxy?
- 100% Solids or Water-Based Epoxy for Container Floors?
- How Thick Should a Container Epoxy Floor Be, and How Long to Cure?
- When Do You Need Food-Grade or Containment Epoxy?
- What Drives the Cost of an Epoxy Coating in Ontario?
- Should You DIY a Container Epoxy Floor or Hire a Crew?
- What Mistakes Make Container Epoxy Floors Fail?
- How Does Van Blanc Coat a Container Floor Before Delivery?
- Frequently Asked Questions
Reading time: about 14 minutes.
Why Coat a Container Floor Instead of Replacing It?
Coating a shipping container floor keeps the original 28mm marine-plywood deck and seals it with an epoxy resin film, instead of tearing the deck out and refastening new plywood. It wins when the wood is structurally sound but you need a chemical-resistant, washable, or food-grade surface. Replacement is reserved for water-damaged or rotted decks.
Most 20ft and 40ft shipping containers leave the factory with a 28mm marine-plywood deck mounted on steel cross-members. After a few ocean crossings the plywood is structurally fine but cosmetically rough: pesticide residue, oil staining from cargo strapping, and grime in the grain. You can rip the floor out (the route we walk through in our guide to swapping out a worn container deck), or seal what’s there with an epoxy system.
Coating wins in three situations: when plywood is sound but you need a chemical-resistant or food-grade surface, when you want to lock down pesticide residue in the wood, or when you need an easy-to-clean floor for brewery cold rooms or any space where a fork truck or pallet jack moves across the deck weekly.
Paul LeBlanc has been delivering containers across Ontario since 1995, and his son Christian works the yard with him now. “Half the people who ask us about a coating don’t actually need one,” Paul says. “If the deck is sound and you’re storing dry goods, you’re spending money for nothing. We tell them that in the yard, before they pay a dollar.” Roughly half of our customers raise floor coatings before delivery, and the answer comes down to budget, use case, and how clean the deck actually is. A wind-and-watertight (WWT) bin with deep oil staining is a tear-out. A new one-trip container with light wear is a coating candidate. We walk the bin with you in the Brantford yard before you commit.
Why Ontario Buyers Choose Coating Over Replacement
Tearing out and replacing the deck on a 20ft bin carries the full cost of new plywood plus the labour to pull and refasten it. A professional epoxy coating on sound existing plywood typically runs a fraction of that and gives you a sealed washable surface in 48-72 hours of cure. For workshop, brewery, or light-commercial use, coating is the better economics. For occupied conversions with water-damaged floors, replacement is non-negotiable.
What Are the Layers in an Epoxy Floor Coating System?
An epoxy floor coating system for a shipping container is not one product. It is a four-layer build: mechanical prep, primer, build coat, and topcoat. Field failures almost always come from someone skipping a layer or substituting a cheaper product for one of the four.
Layer one is mechanical prep. On plywood that means sanding with 60-grit then 120-grit, vacuuming clean, and a tack-rag wipe with denatured alcohol. On concrete it means diamond grinding or shot blasting. According to Sherwin-Williams’ resin flooring guidance, surface profile matters more than chemistry: a smooth sealed substrate rejects any epoxy.
Layer two is primer. On plywood, thinned epoxy primer drives penetration into the wood grain. On concrete, a moisture-tolerant primer rated for the slab’s relative humidity. Skip the primer and the build coat sits on top rather than bonding in, which is the top cause of peeling failure in DIY container floors.
Layer three is the build coat: 100% solids epoxy mixed with polyamine hardener, poured and back-rolled at 8-12 mils wet film per coat. Two coats is standard. The build coat carries chemical resistance, abrasion resistance, and colour.
Layer four is the topcoat. Optional but recommended for any bin with UV exposure, forklift wheels, or chemical spills. A urethane or polyaspartic at 4-6 mils sacrifices itself before the epoxy below. Replacing a topcoat after seven years is straightforward. Replacing a failed epoxy system is a tear-out.
Total Dry Film Thickness Buyers Should Expect
A complete epoxy system lands at 14-22 mils total dry film thickness (DFT): 2 mils primer, 8-15 mils across two build coats, 4-6 mils topcoat. Cheap water-based garage paint sits at 2-3 mils DFT and scratches under a steel-toe boot in a season. The mil reading separates a 15-year floor from an 18-month one.
How Do You Prep an Ontario Container Wood Deck for Epoxy?
Prepping a container wood deck for epoxy means stripping the factory varnish and contaminants so the resin can bond into the grain. The factory floor in a new one-trip 20ft container is 28mm IICL-grade marine plywood (keruing or apitong hardwood), pressure-treated and sealed with a varnish finish. After one voyage it has oil and grease from cargo strapping, grit and abrasion patches, trace pesticide residue, and a thin layer of sea-air corrosion near the door sill.
None of that matters for a storage bin. All of it matters when bonding epoxy. Prep on wood is a five-step sequence: vacuum the deck, sand with 60-grit to break the factory varnish, vacuum corners, wipe with denatured alcohol, and let flash off 45-60 minutes before opening the primer.
On a container floor, prep takes roughly twice as long as the coating itself. The same discipline applies to the walls and panels, which is why our walkthrough of marine epoxy paint for container exteriors spends most of its length on surface prep too. Flooring contractors estimate 60-70% of project time goes into prep. Inadequate prep is the single largest predictor of coating failure regardless of product.
For containers with a poured concrete pad (workshop and office conversions), prep flips to diamond grinding with 30-grit metal-bond segments, vacuum, then a moisture test per ASTM D4263. Skip the moisture test and vapor pressure pushes the epoxy off the slab from underneath.
100% Solids or Water-Based Epoxy for Container Floors?
Three epoxy chemistries are sold for container floor coating: 100% solids, water-based, and solvent-based. Each has a real use case, but only two are appropriate for shipping container floors that will see weekly traffic or chemical exposure.
100% solids epoxy contains no water and no solvent. A and B parts cure by chemical reaction with negligible evaporation, yielding a thick film (8-15 mils per coat). Chemical resistance, abrasion resistance, and lifespan are the highest of any epoxy chemistry: 15-20 years in moderate-traffic use. Trade-off: pot life is 30-40 minutes. A 20ft floor (160 sq ft) is a single pour. A 40ft floor (320 sq ft) is two pours back-to-back.
Water-based epoxy dilutes the same resin chemistry with water. Dry film is much lower (2-4 mils after evaporation). Pot life extends to two hours, cleanup is soap and water, chemical resistance is lower. For a clean storage bin with no fork truck and no chemicals, water-based lasts 5-8 years. For anything more demanding, it isn’t enough.
Solvent-based epoxy uses xylene as carrier. Solvents off-gas during cure, requiring respirator and forced ventilation. We don’t recommend it for any sealed-bin application: off-gas accumulates inside the box and creates a real worker-safety issue. Ontario Ministry of Labour treats epoxy as a WHMIS 2015 controlled product, and confined-space ventilation requirements escalate quickly for solvent-borne systems.
The Quick Decision Rule
One question sorts the chemistry choice fast. Will anything heavier than a person on a hand truck cross this floor in the next 10 years? If yes, you want 100% solids epoxy with a urethane topcoat. If no, water-based is fine and will save you 30-40% on the material bill. The container will tell you which it is. A workshop bin needs the durable system. A clean-supply storage bin doesn’t.
How Thick Should a Container Epoxy Floor Be, and How Long to Cure?
Three numbers determine whether a container epoxy floor lasts: wet film thickness, pot life, and cure time. For 100% solids epoxy the target is 10-12 mils wet per coat, a 30-40 minute pot life at 20°C, and full cure in 1-3 days.
Wet film thickness is measured with a notched gauge dragged through fresh epoxy. For 100% solids the target is 10-12 mils per coat on plywood. Roller technique matters: a 9-inch medium-nap roller back-rolled slowly, almost dragging rather than spinning, lays a uniform film. Aggressive rolling leaves pinholes that show up six months later as rust freckles where moisture reached the steel cross-members.
Pot life governs the pace. At 20°C, 100% solids gives 30-40 minutes after mix. At 25°C, 20-25 minutes. Below 15°C the resin gets thick and cure stalls. Ontario rule: don’t coat below 10°C in unheated spaces, and don’t coat in summer heat with sun on the steel walls (the bin acts as an oven and the resin gels in the bucket).
Cure has two stages. Tack-free (walk on gingerly) is 8-12 hours at 20°C. Full cure (forklift, chemical exposure) is 1-3 days. Recoat windows between layers are 16-24 hours. Miss the window and you abrade between coats for mechanical bond. Hit it and layers cross-link chemically into a single film.
The Mil Gauge Is Not Optional
Every professional install uses a wet film gauge after each pour and a dry film gauge after cure. We’ve audited floors where the homeowner thought they applied 10 mils and the reading came back at 3 because roller technique pulled resin off as fast as it laid down. A wet film comb gauge prevents a do-over.
When Do You Need Food-Grade or Containment Epoxy?
Food-grade and containment epoxy are two specialty coatings that drive a meaningful share of our container work. You need food-grade epoxy when food touches the floor during processing, and containment-grade epoxy when the floor must hold a chemical or fuel spill. Both go beyond a standard workshop floor.
Food-grade epoxy meets 21 CFR 175.300 for resinous coatings in food contact. Health Canada accepts FDA-cleared coatings under the Food and Drugs Act. For Ontario brewery cold rooms, curing chambers, maple-syrup processing, or craft beverage builds, FDA-compliant coating is table stakes before an inspector signs off. The system is 100% solids epoxy certified to 175.300, applied at 12-15 mils DFT, finished with food-safe urethane or polyaspartic.
Containment is the second specialty. Anyone storing chemicals, fuel, or solvents needs the floor to function as secondary containment. The Ontario Environmental Protection Act and TSSA liquid-fuels code require containment volume equal to 110% of the largest container stored. Inside a shipping container that means a coated floor that holds a spill 72 hours without seeping, plus a coved wall-to-floor transition to prevent edge leakage. The chemical-resistant topcoat is selected for the commodity stored.
For both food-grade and containment we recommend a trained applicator. The chemistry isn’t different from a workshop floor, but documentation matters. Inspectors want product data sheets, batch numbers, and applicator certification on file. A DIY install rarely produces that paper.
What Brantford-Area Food and Beverage Buyers Ask
Most of the food-grade requests we field in Brantford and the surrounding region come from craft brewers, kombucha makers, maple producers, and small-batch sauce or condiment companies converting a 40HC container into a controlled processing room. The recipe is consistent: spray-foam-insulated walls (to R-25), an FDA-compliant 100% solids epoxy floor with coved corners, a stainless wall liner for the food-contact zone, and sealed light fixtures. A processing build like this lives in our at-the-yard conversion program, where venting, insulation, and interior finishing happen under engineered drawings before the bin ships. We handle the build, and the customer gets a Health-Unit-ready space delivered.
What Drives the Cost of an Epoxy Coating in Ontario?
The cost of an epoxy container floor coating in Ontario is driven by three variables: bin size, system spec, and whether the work happens in our Brantford yard before delivery or on your site afterward. Rather than quote a number that drifts with the steel and resin markets, here is what each system actually puts on the floor, which is what drives the quote.
| System type | Total dry film thickness | What drives the cost up or down | Lifespan |
|---|---|---|---|
| Water-based 2-coat (light duty) | 4-8 mils | Lowest material volume and no topcoat, so the floor area (160 vs 320 sq ft) is the main lever | 5-8 years |
| 100% solids 2-coat, no topcoat | 16-24 mils | Thicker build coats mean more resin per square foot, so a 40ft deck uses roughly double the material of a 20ft | 10-15 years |
| 100% solids 2-coat + urethane topcoat | 20-30 mils | Adds a urethane or polyaspartic layer and a second cure window, raising both material and labour | 15-20 years |
| FDA food-grade 100% solids + coved corners | 14-21 mils | Certified product, coved wall-to-floor transitions, and documentation add labour over a plain workshop floor | 15-20 years |
| Containment-grade chemical resistant | 20-30 mils | Commodity-specific topcoat plus coved containment detailing is the most labour-intensive build | 15-20 years |
Every quote we give is full-service installed pricing on a bin already in our Brantford yard. On-site coating after delivery adds travel and portable ventilation, moving the price up 20-35%.
DIY kits land at roughly half the installed price but failure rate climbs. Most homeowner failures are prep failures: floor sanded inconsistently, moisture from a damp rag never flashed off, or the recoat window missed and the second coat never bonded. Budget two full days, follow prep to the letter, and accept a 5-year refresh cycle rather than 15.
Many people call us asking why a Facebook listing offers a “fully coated” container for far less than any real installed job. Two weeks later they call back: seller never delivered, deposit gone, bank dispute running. The bin that’s suspiciously cheaper online is the bin that never arrives. Real coating work has real cost: certified product, mechanical prep equipment, ventilation gear, gauges, and an applicator who knows when not to pour.
Should You DIY a Container Epoxy Floor or Hire a Crew?
Whether to DIY a container epoxy floor or hire a crew comes down to the use case. A surprising number of buyers want to try the coating themselves, and we don’t talk anyone out of it when the bin sees light, low-stakes use. We do steer commercial and regulated jobs toward a professional install.
DIY is realistic when the container sees light residential or hobby use (gardening shed, motorcycle storage), the buyer is comfortable with respirator and full PPE, and accepts a water-based or homeowner-grade kit at the lower performance end. Canadian kits from suppliers like PowerCOAT and Preston Paints are sized for a 20ft bin and include primer plus enough resin for two coats.
Professional installation makes sense when the bin sees commercial traffic (fork truck, hand truck, rolling racks), there’s a regulatory reason for documentation (food grade, containment, occupied office), or the buyer wants a 15-year lifespan with single-call warranty.
The middle ground we see most often: a customer picks a bin from our in-yard container stock, has us deliver, then hires a local flooring contractor for the coating. We recommend installers in the Brantford-Hamilton-KW corridor who do good container work. Our role is making sure the bin arrives on a level enough pad that the cured floor stays flat. A wavy pad means a wavy epoxy floor.
Christian LeBlanc, second-generation operator: “The DIY epoxy kits work fine for a hobby shed bin. They don’t work for a brewery, they don’t work for a workshop with a forklift, and they really don’t work for a food prep space. The product isn’t the problem. The variable that makes or breaks every coating I’ve ever seen is whether the prep was done at 100% or at 80%. The 80% jobs fail at year three. The 100% jobs are still going at year 15. We tell customers the truth before they spend the money.”
What Mistakes Make Container Epoxy Floors Fail?
Container epoxy floors fail for five repeatable reasons: skipped primer, substrate moisture, cold-weather pouring, ignored coves, and the wrong topcoat. We get called in to look at failed coatings about a dozen times a year, usually on bins not bought from us, and the failure patterns trace back to those five missed steps.
Mistake one: skipping the primer. Without thinned-down primer driving epoxy into the wood grain or concrete pores, the build coat sits on top like paint and peels off in sheets when the substrate flexes under load.
Mistake two: ignoring substrate moisture. Marine plywood at 18-22% equilibrium moisture is too wet to coat. Water needs somewhere to go after the epoxy seals the surface, and where it goes is the bond line. Bubbles and delamination follow within months. Acclimate two to three weeks, or use a moisture-tolerant primer.
Mistake three: pouring in cold weather. Below 10°C the resin thickens and cure stalls. We see this every spring when buyers coat in late March before the yard warms up. The coating looks fine for a week, then develops a hazy soft surface that scratches with a fingernail. Run a propane heater 24-48 hours before coating, maintained through cure.
Mistake four: ignoring the cove. Where floor meets wall, water and chemicals pool. A flat coat that stops at the corner creates a stress riser where the coating fails first. Proper installs include a coved cant strip or thickened epoxy fillet sealing the transition. Containment installs require it by code.
Mistake five: the wrong topcoat. Epoxy yellows under UV. A bin with doors open during loading sees direct sun for hours, and the epoxy discolours within two seasons. A UV-stable urethane or polyaspartic protects the epoxy underneath. Skip it and you refresh the floor on a four-year cycle instead of fifteen.
How Does Van Blanc Coat a Container Floor Before Delivery?
Van Blanc coats a container floor in our Brantford yard over roughly a week, on a fixed eight-step sequence run against your delivery date. For customers who want the full epoxy build handled before the bin ships, here is the order we run it in.
Day one is prep. Vacuum, sand with 60-grit, vacuum again, sand with 120-grit, vacuum, wipe with denatured alcohol. Christian or a delivery operator takes a moisture meter reading and logs it. If above 16%, the bin goes back to the lineup and we re-test in 48 hours.
Day two morning is primer. Mix the manufacturer-specified primer in small batches, pour and back-roll across the deck including a feathered edge up the wall for the cove. Two-hour flash-off minimum.
Day two afternoon is the first build coat. 100% solids, mixed by weight on a scale, poured down the centre and back-rolled to the walls with a 9-inch medium-nap roller. Wet film thickness checked at three points.
Day three is the second build coat. Same procedure, perpendicular roller direction. Mil reading taken again. Topcoat goes on day four after build coats reach tack-free cure.
Day five through eight is cure window. Bin doesn’t move and floor doesn’t see traffic. Day eight or nine we open the doors, take a final dry film reading at five points, and the bin is ready.
That’s a one-week commitment, which is why we schedule the coating against your delivery date. An uncoated bin ships in our standard 1-3 days across Ontario; adding the in-yard epoxy build pushes the total out by the cure window, and we tell you the real combined date up front. Every quote includes a real lead time, not a hopeful one.
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Frequently Asked Questions
How long does an epoxy floor coating last inside a shipping container?
A 100% solids epoxy build coat with a urethane topcoat, properly installed over prepped marine plywood, lasts 15-20 years in moderate-traffic use. Water-based systems last 5-8 years. Lifespan depends more on prep quality than the resin price tag.
Can I apply epoxy to a container floor in winter in Ontario?
Not without supplemental heat. Below 10°C the resin gets thick, cure stalls, and the coating develops haze that scratches with a fingernail. We coat in our heated Brantford yard year-round. Outdoor or unheated-bin coating in Ontario is realistically an April-to-October job.
Do I need a food-grade epoxy if I’m storing dry goods in sealed packaging?
No. Food-grade certification is required for direct food contact or processing environments where food touches the floor (brewing, butchering, sauce production, maple syrup processing). Sealed packaged storage is standard 100% solids epoxy with no FDA compliance requirement.
Will an epoxy coating make my container watertight at the floor seams?
The epoxy seals the floor surface and the floor-to-wall cove if a cove is installed, but it doesn’t seal door gaskets, roof welds, or the door sill. A bin needs to be wind-and-watertight at the structural level before coating is meaningful.
Can I coat the floor over existing oil stains and paint marks?
Light staining sands out during prep. Heavy oil contamination on a used WWT-grade container often needs a degreaser pass before sanding, and in extreme cases the affected plywood section gets cut out and replaced before coating. We make the call after walking the bin with you.
What is the difference between epoxy floor paint and an epoxy floor coating system?
Floor paint sold at hardware stores is usually single-component water-based at 2-3 mils DFT. A coating system is primer plus 100% solids build coat at 14-22 mils total DFT, often with a topcoat. The difference is 5x more material on the floor and 10-15 years of additional lifespan.
Can the floor be re-coated when the original system wears out?
Yes, with prep. The old topcoat is sanded back to expose fresh epoxy, contaminants are cleaned off, and a fresh topcoat plus optional build coat is applied. Re-coating a professional install runs 40-50% of the original cost. Re-coating a failed DIY install often means full removal first.
Is epoxy coating worth it for a basic storage container?
If you plan to keep the bin 5+ years and want a wipeable floor, even a water-based coating pays for itself in cleaning labour saved. Storing for under 2 years and reselling, the coating doesn’t recover its cost. For workshop, brewery, food, or chemical use, coating is non-negotiable.
How fast can Van Blanc deliver a coated container in Ontario?
An uncoated container delivers in 1-3 days across Ontario from our 4 Brantford yards. A coating system applied in our yard adds 1-3 days for prep, two build coats, optional topcoat, and cure window. We schedule the coating against your target delivery date.
Do I have to pick the coating system when I order the container?
Ideally yes, because the system spec drives in-yard scheduling. Order the bin first and decide later, we can still apply the system, but the bin sits an extra week instead of going straight to you. Many customers walk the yard, look at sample coated bins, and decide on the spot.
Sources
- Sherwin-Williams. (2025). Solvent-Based vs. Water-Based vs. 100% Solids Epoxy. Resin Flooring Technical Articles. Sherwin-Williams Industrial
- U.S. Food and Drug Administration. (2024). 21 CFR 175.300 – Resinous and polymeric coatings. Code of Federal Regulations. eCFR
- International Organization for Standardization. (2022). ISO 6346:2022 Freight containers, coding, identification and marking. iso.org
- ASTM International. (2024). ASTM D4263 Standard Test Method for Indicating Moisture in Concrete by the Plastic Sheet Method. astm.org
- Stronghold Floors. (2025). Grinding vs. Shot Blasting: How We Prep Before Applying Epoxy Floor Coatings. strongholdfloors.com
Reach Van Blanc in Brantford
We have been supplying shipping containers across Ontario since 1995. Our warehouse is at 90 Morton Avenue E in Brantford, and we deliver right across the province on a cash-on-delivery basis. No surprise fees, no chase-the-paperwork.
Van Blanc Ent. Inc. – 90 Morton Ave E Unit 1B, Brantford, ON N3R 7J7 – +1 888-509-6658
Bring your container project to us. Walk the yard, look at sample coated floors, and pick the system that actually fits your use case. We’ll quote a real lead time, not a hopeful one, and the coating goes on the bin before it leaves Brantford.