24-Hour Gym's New Rubber and Epoxy Floors Left Members Breathless; 23 Cancelled Over Lingering Adhesive Fumes

An air-conditioned room that never closes, people breathing hard on cardio machines, and a brand-new floor still releasing chemical vapours: it is one of the toughest post-renovation problems a 24-hour gym can face.

That gym rubber floor smell your contractor says will "be gone in a month" can send members out the door long before it fades. This article walks through a situation many gyms run into after new flooring goes down, explains where rubber, PU adhesive and epoxy odours really come from, why fans and charcoal bags barely help, and why WHD's Paint Odor & Chemical Residue Removal service with the Master Ozone Generator is a fast, measurable way out.

See the Ozone Odor Removal Service

The Night the Treadmills Went Quiet: When Gym Rubber Floor Smell Left Members Gasping

This story is a composite based on situations we commonly see; names and places are fictional.

Pakin, 38, owns PulseLine 24 Fitness in Bangkok's Ram Inthra area. It is a 650-square-metre gym open around the clock, with roughly 1,400 regular members: office workers who drop in after work, night-shift nurses, and university students who like to train at 1 a.m. because the place is quiet.

In early June he invested almost 1.2 million baht to expand the free-weight zone from 120 to 220 square metres. The contractor laid 15 mm rubber tiles bonded with PU adhesive to take the impact of heavy dumbbells and barbells, and poured a dark-grey epoxy floor across another 80 square metres for functional training. The work finished on schedule on 16 June, and the new zone opened the very next morning. A 24-hour gym, after all, has no quiet days to spare.

On day one, the glossy epoxy looked sharp and professional. But the first thing everyone noticed as they walked through the door was the smell: a heavy new-rubber odour mixed with a sharp, thinner-like sting, carried through the room by the air conditioning.

The real problem was the layout. The cardio area, with 30 treadmills and 12 bikes, sat right next to the free-weight zone with no wall in between. When members ran at 9 to 10 km/h, they breathed faster and much deeper. Every lungful they pulled in was the same air rising off the new floor.

On 19 June, Natcha, a member training for a half marathon, had to hit the stop button mid-run. Her chest felt tight and she could not stop coughing. She has had mild asthma for years. That night she messaged the gym on LINE: "I couldn't even run ten minutes without feeling short of breath. The smell is really strong."

By the second week the pattern was obvious. Between 10 p.m. and 2 a.m., when the doors were shut and the air conditioning recirculated the same air, the smell was at its worst. In the afternoons, when sunlight through the glass wall warmed the rubber, it grew even sharper. Two trainers were getting headaches almost every shift, and Mew, the branch manager, kept a pack of painkillers on her desk.

After three weeks, the gym's LINE account had logged 41 complaints. Google Maps reviews started mentioning "chemical smell" and "hard to breathe". Twenty-three annual members asked to cancel or freeze their memberships, and a company that had bought a corporate package for 60 employees said it would "reconsider" before renewing the following month.

Pakin called the contractor. The answer: "All new rubber floors smell like this. Give it 30 to 60 days and it'll fade." When he ran the numbers, two months of lost revenue could come close to half of what the flooring had cost. And worse than the money was the damage to a reputation built on members telling friends, "The air's great there. You can train any time."

The Hidden Cost of Gym Rubber Floor Smell

Many people treat new-floor odour as a "temporary nuisance". For a business that sells health and a good workout experience, though, gym rubber floor smell hits people's bodies, cash flow, reputation and trust all at once.

1. Member and staff health

During cardio, the volume of air you breathe per minute rises several times over compared with sitting still, and many people switch to mouth breathing. That means the body takes in far more of whatever is floating in the room. Common symptoms in spaces with high VOC levels include:

• Headaches and dizziness, plus feeling unusually tired
• Eye, nose and throat irritation, such as a scratchy throat, coughing or a runny nose
• Nausea, especially during hard effort in a poorly ventilated room
• Allergy and asthma flare-ups in people who already have these conditions
• Trainers and front-desk staff who spend 8 to 10 hours a day in the space get far longer exposure than members do
• Older adults, pregnant women and people with respiratory conditions tend to be more sensitive than others

Beyond short-term symptoms, long-term exposure to certain VOCs is a concern that health agencies take seriously. A workout room full of chemical vapours is not something to simply wait out.

2. Money leaking out every day

• Annual members cancel or freeze, and predictable recurring revenue disappears overnight
• High-value corporate packages are suddenly at risk of not renewing
• Personal training sessions get postponed because clients do not want to train in the smelly zone
• Walk-ins who come for the "new zone" promotion try the gym once and never sign up
• Fans, air fresheners and higher electricity bills pile up from trial-and-error fixes

3. Reputation and online reviews

People choose gyms based on reviews and word of mouth. A handful of comments saying "smells like chemicals" is enough to push someone comparing options to go elsewhere, and those reviews stay online long after the smell is gone.

4. Trust from members and the team

Members start to wonder whether the owner really cares about their health. Trainers who have to smile at clients while nursing a headache begin to lose motivation. That kind of trust takes years to build and only a few weeks to lose.

What Is That Smell, Really? Rubber Tiles, PU Adhesive and Epoxy Explained

Most of what you smell after new flooring goes in comes from volatile organic compounds, or VOCs: chemicals that evaporate into the air at room temperature. Measured together, they are reported as TVOC (Total Volatile Organic Compounds). In a gym that installs rubber and epoxy floors at the same time, the odour comes from several layers at once.

Rubber tiles for the free-weight zone

Many shock-absorbing gym tiles are made from synthetic rubber granules, often recycled SBR, held together with a polyurethane binder. That familiar "new rubber" smell comes from residues left over from the rubber curing (vulcanisation) process, such as sulphur-containing compounds, accelerators and processing oils in the rubber. They seep out of the tile surface slowly, over a long period.

PU adhesive under the tiles

The polyurethane glue used to bond tiles to the concrete slab can contain solvents in some formulations, and it gives off vapours while it cures. Because it is pinned under 15 mm of rubber, those vapours escape only gradually through the seams between tiles, which is why the smell drags on far longer than most owners expect.

Epoxy in the functional training area

Epoxy flooring is made by mixing a resin with a hardener, often an amine-based compound with a distinctive, pungent smell. Some primer systems also use thinner or other solvents. If the floor is opened for use before it has fully cured, emissions in the first days can be quite strong.

Heat, closed rooms and re-absorption

VOCs evaporate faster as temperature rises, which explains the sharper smell on sunny afternoons. At night, with the doors shut and the air conditioning recirculating, vapours simply build up. Worse still, those chemicals get absorbed into porous materials such as bench padding foam, yoga mats, punching bags, gypsum ceiling boards and curtains, then slowly released again. This is called off-gassing, and it is why the smell seems to "never go away" even weeks later.

Why the Usual Fixes Fall Short in a Gym

Before calling in specialists, Pakin tried almost every trick gym owners usually reach for. The results tend to look like this:

1. Opening the doors and running industrial fans. It helps a little, but it takes days to weeks. A 24-hour gym cannot leave its doors open overnight for security reasons, and during the day it means heat, dust and a soaring air-conditioning bill.
2. Air fresheners and aroma diffusers. These only mask the odour. Eucalyptus mixed with rubber produced a strange blend that several members said made them dizzier than before, and fragrances add even more VOCs to the room.
3. Bamboo charcoal and baking soda. Their absorption capacity is tiny. Twenty bags of charcoal are no match for a room holding several hundred cubic metres of air with odour sources spread across the entire floor.
4. Home air purifiers. They are designed for small rooms, so in a large gym hall the effect is barely noticeable, and carbon filters saturate quickly when faced with heavy chemical vapours.
5. Scrubbing the floor with cleaning products. This only deals with the surface. The source of the smell is inside the rubber, under the tiles and in porous materials around the room, and some cleaners add yet another chemical odour.
6. Waiting for it to go away. It may work eventually, but members will not wait. Meanwhile, the odour keeps soaking into padding, foam and fabrics, which become secondary sources that release it again later.

A Measurable Solution: WHD Paint Odor & Chemical Residue Removal with the Master Ozone Generator

With the usual fixes going nowhere, Pakin contacted World Health Disinfection (WHD), which provides a dedicated ozone paint odor and chemical residue removal service using the Master Ozone Generator, built for tackling paint smells and chemical vapours in enclosed spaces.

How ozone works

The machine releases ozone (O₃) into the space, mimicking the way nature purifies air. Ozone is a powerful oxidiser, so it reacts with and breaks the molecular bonds of odour molecules, chemical vapours (VOCs) and germs right at the source. It destroys the smell rather than covering it up the way perfume does.

Once it has reacted, ozone naturally decomposes back into oxygen (O₂), so no chemical residue is left on the rubber, the equipment or the benches members touch. And because ozone is a gas, it reaches corners that cloths and sprays cannot: the seams between tiles, under dumbbell racks, behind machines and up around the ceiling.

TVOC readings before and after, not just "it feels better"

What sets WHD apart is on-site TVOC measurement before and after treatment, using an AM1310 meter backed by calibration documents: a KIMO PT100 SC0110 adjusting certificate and a BR-SMART certificate of calibration. WHD is one of the few providers in Thailand that shows TVOC reduction results measured at real job sites, which gives gym owners solid data to share with members and staff.

Fast enough for a business that never closes

Ozone treatment must be carried out in a closed, unoccupied space, with no people, pets or plants inside, and it is handled by trained technicians. After the cycle, the ozone is left to decompose and the area is ventilated before anyone goes back in. According to the service page, sites are typically ready to use within about 2 hours. For a 24-hour gym, that means closing a single zone during the quietest overnight window instead of shutting the branch for days.

10 Reasons Gyms Choose WHD for Ozone Odor Removal

1. It breaks down odour at the source

Ozone reacts directly with odour molecules, so rubber and adhesive smells genuinely decrease instead of returning once the air freshener wears off. Explore the ozone odor removal service.

2. It helps reduce VOCs from rubber, PU and epoxy

The service covers epoxy and PU odours, thinner, lacquer and industrial adhesives, which are exactly the main culprits behind a newly floored gym.

3. You get before-and-after TVOC data

Readings from a calibrated AM1310 meter show you how much the chemical vapours dropped on your own site, and give you something transparent to show members.

4. Ready to use within about 2 hours

Ideal for a 24-hour gym that cannot afford long closures. Treat one zone late at night and open as usual the next morning.

5. No chemical residue

Ozone reverts to oxygen on its own, leaving no film or residue on dumbbells, bench pads or the floor where members stretch.

6. It reaches every corner

As a gas, ozone spreads through the whole closed space, including tile seams, the undersides of machines and spots that are hard to clean by hand.

7. Built for large spaces

This chemical residue removal with ozone works quickly across wide areas, from small rooms to open workout floors and factories, with the cycle calculated for each room's volume.

8. It tackles mustiness and germs too

Beyond chemical smells, ozone also helps deal with musty odours, germs and mould in enclosed spaces, a classic headache in gym locker rooms and equipment stores.

9. Trained technicians handle safety at every step

The team surveys the site, assesses materials, moves or covers ozone-sensitive items, and makes sure no one enters the area during treatment.

10. Experience across many job types

WHD's work includes condo bedrooms, living rooms, car paint spraying, office meeting rooms and chemical industrial plants. Request an ozone treatment quote for your gym.

Before and After Ozone Treatment at PulseLine 24 Fitness

How the WHD Team Works

1. Site survey and TVOC check. The team assesses room size, materials and odour sources, and measures VOC levels before starting.
2. People, pets and plants out. Ozone-sensitive items, such as natural rubber parts, artworks or delicate electronics, are moved or covered as needed.
3. Seal the area and set up the Master Ozone Generator. Doors and vents are closed, and clear "no entry" signs go up.
4. Run a cycle sized to the room's volume. Technicians control the timing and make sure nobody enters.
5. Let the ozone decompose and ventilate. Only then is anyone allowed back in.
6. Re-check TVOC and odour. Results are compared with the readings taken before treatment.
7. Hand the space back. It is typically ready to use within about 2 hours after the cycle ends.

How the Story Ended: One Tuesday Night, a Few Hours Closed

Pakin gave members three days' notice that the free-weight and cardio zones would close from 1 a.m. to 5 a.m. on Tuesday night. The WHD team arrived in the evening to survey the site and take TVOC readings, then moved the potted plants out, locked the resistance bands away and covered some of the machine screens as the technicians advised.

On Wednesday morning, Mew was the first to walk in, and she paused for a moment. The sharp smell that had greeted her every morning was clearly lighter. The post-treatment TVOC reading was lower than the one taken before the work began. Pakin posted the results on the gym's LINE account along with an apology, and invited members who had frozen their memberships to come back for a free trial week.

Not everyone returned. But within a month, a number of those members were back, the company with the corporate package decided to renew, and Natcha was running on her usual treadmill again. She told the front desk simply, "I managed the full hour today."

How to Prevent Gym Rubber Floor Smell in Your Next Renovation

• Choose low-VOC materials. Ask suppliers for emissions data on rubber tiles, adhesives and epoxy systems before you buy.
• Allow proper curing time. Follow the manufacturer's guidance instead of opening the zone the moment the crew packs up.
• Renovate in phases. Work one zone at a time and seal it off with plastic sheeting or temporary partitions.
• Move padding, mats and punching bags out during the works so they do not soak up odours.
• Book ozone treatment before reopening. Make it a standard step in the handover plan, not an emergency fix.
• Measure TVOC before opening to members. Confirm air quality with data, not guesswork.

FAQ: Ozone Odor Removal for Gyms

Does everyone need to leave during treatment?

Yes. Ozone treatment is done in a closed, unoccupied space with no people, pets or plants inside, and re-entry is allowed only after the ozone has decomposed and the area has been ventilated.

How long does it take?

It depends on the size of the space and how strong the odour is. Sites are typically ready to use within about 2 hours after the cycle ends, and the team will confirm the timeframe after the survey.

Does ozone leave any residue?

Ozone naturally breaks down back into oxygen, so no chemical residue is left behind. The team waits for it to decompose and ventilates the area before handing it back.

What size of space is it suitable for?

Anything from a condo bedroom or meeting room to a gym floor or factory. The team calculates the treatment cycle based on the actual volume of the room.

Does a 24-hour gym have to close the whole branch?

Not necessarily. If zones can be separated, you can plan to close just the affected area during the quietest overnight hours.

Can ozone affect rubber flooring or equipment?

Some materials, such as natural rubber, can be sensitive to ozone. That is why technicians assess the materials first, set an appropriate cycle, and move or cover ozone-sensitive equipment where needed.

How is this different from running air purifiers?

An air purifier only filters the air that passes through it. Ozone spreads through the whole room and reacts with odour molecules in every corner, and WHD backs the result with TVOC readings.

Related Services and Resources

• Ozone Cleaning Service for musty odours and germs in buildings
• Disinfection Spraying Service for locker rooms and shared touchpoints
• Ozone Disinfection Machine
• US EPA: Volatile Organic Compounds' Impact on Indoor Air Quality
• WHO: Air Quality, Energy and Health

Don't Let a New Floor Smell Drive Your Members Away

Talk to the WHD team about rubber, PU adhesive and epoxy odours in your gym, with before-and-after TVOC readings taken on site.

See the service & get a quote — click here

Call 065-556-6294 · LINE @whd268 · Email worldhealthdisinfection@gmail.com
88/268 Kanlapaphruek Rd., Bang Khae, Bangkok 10160, Thailand