Can the smell of polyurethane hurt you?
This varnish lasts for a long time and is one of the most common materials used for insulation and wood coatings including on wood floors. Polyurethane contains isocyanates, a compound that can potentially harm your lungs upon exposure through inhalation or ingestion.
► Inhaling Urethane can irritate the nose and throat. ► Very high exposure can cause headache, nausea, vomiting, confusion, dizziness, lightheadedness and passing out.
Overall, it is said that it takes a full 30 days for the floors to properly cure, which means this will likely be the duration of time that you deal with toxic fumes in the air space.
Inhalation of such vapors can produce severe irritation and burning to the mucous membranes of the eyes and respiratory tract. Inhalation may also cause nausea, vomiting, abdominal pain, and breathing problems. In addition, skin contact can cause a rash commonly referred to as contact dermatitis.
We recommend a minimum of 2 days of socks-only traffic for floors finished with oil polyurethane. The house is not inhabitable for a minimum of 2 days after the job is completed, and better to stay out for at least 5 as the fumes/off-gassing is not advisable to breathe in, even if there are other rooms to sleep in.
The answer: Probably a lot less time than you think! Generally speaking, it's recommended that a building remain empty for eight to 24 hours after insulation installation.
Polyurethane is the result of the chemical reaction between a polyol and a diisocyanate. Once the chemical reaction of its components has taken place, the result is a polyurethane foam that is completely inert and harmless to humans.
This leads to a frequently asked question; do polyurethane products that come into contact with humans present any kind of health risk? The short answer is that no, polyurethane is not toxic. It is actually a safe and sustainable option when compared to many alternative materials.
The Safety Data Sheets (SDS) of polyurethane products provide a list of potential health effects and their symptoms. Diisocyanates have been known to cause irritation of the eyes, nose, throat, lungs and skin. They also can cause allergic reactions (sensitization) of the skin and lungs.
...
Handling
- Wear gloves to avoid skin contact. Certain types of urethanes will actually stain the skin if contact occurs. ...
- Do not breathe vapours. Urethanes are moisture sensitive. ...
- Skin contact.
How do you get rid of polyurethane smell fast?
Use activated charcoal. Once you have the polyurethane dry, activated charcoal is one of the best natural products to remove odors and impurities from the air. All you need to do is put activated charcoal on paper plates and let these plates rest on the varnished surface for around 24 hours.
A: It is recommended to stay off the floors for up to 24 hours after the final coat is applied to the floors. For the first 48 hours we recommend that you wear socks only, no shoes or bare feet.

Air-purifying respirators (APR) and powered air-purifying respirators (PAPR) are generally appropriate for exterior applications and may be used when spraying polyurethane foam in exterior applications. Supplied air respirators (SAR) are typically used in interior applications.
Respiratory Issues First, polyurethane is a petrochemical resin that contains known respiratory toxins called isocyanates. When left uncured, polyurethane can cause asthma and other breathing problems.
Water-based polyurethane can have less of an offensive odor when compared to oil-based products, but floors require at least four coats to achieve the desired level of protection. While oil-based polyurethane only needs two or three coats, the odor may be so strong the home is uninhabitable for several days.
Exposure to Flames
Smoking around wet polyurethane, generating a spark when turning on a light switch or having the furnace kick on can cause the vapors to explode. Burning polyurethane also creates dioxin -- one of the most toxic substances on Earth.
Polyurethane is dry when the surface no longer feels tacky and does not appear to be wet anymore. At this time, you can safely walk on the floor. Drying time should take about 24 to 48 hours. Walking is the only thing you can do on the floors though as rough treatment can make wrinkles and blemishes on the floor.
- Replace the furnace filter after construction is finished. ...
- Run the furnace fan (or ERV/HRV if you have one) at all times. ...
- Bake off the toxins. ...
- Open windows. ...
- Run the bathroom and kitchen exhaust fans. ...
- Consider an air purifier.
Varathane Gloss No Odor Water Based Interior Polyurethane, 1 Gal.
Try cleaning with one of the citrus-based cleaners, such as Citrus Green or Citrus Clean. Or, with paint thinner. Or, try running alcohol or denatured alcohol.
Is polyurethane toxic to sleep on?
Types of Mattress Foams
But polyurethane is made from petroleum chemicals that can emit VOCs—harmful chemicals that can cause respiratory irritation or other health problems.
In addition, coexposures such as solvents used in the production of polyurethane foams, coatings, and spray applications can be absorbed through the skin (Boman and Maibach 2000).
Polyurethane foam is not toxic in and of itself. Off-gassing in polyurethane foam products may induce health risks for consumers, but there are methods of prevention.
Answer: Polyurethane (PUR) technologies can provide the benefit of no added formaldehyde. In fact, the three polyurethane technologies most widely used to produce wood furniture coatings have no added formaldehyde: two-component solventborne PUR, two-component waterborne PUR, and one-component waterborne PUR.
Polyurethanes can be manufactured to be FDA compliant, ROHS and REACH compliant. Nowadays, the safest way to make polyurethane foam for the environment, machine operators, and users is using a natural blowing agent, water!
Lacquer is a clear or colored coating (called a varnish) that is often used to give wooden surfaces a glossy look. Lacquer is dangerous to swallow. Breathing in the fumes for a long period is also harmful.
However, some memory foam mattress owners have complaints about memory foam's initial “chemical-like” smell, otherwise known as off-gassing. This unpleasant odor is caused by the petrochemicals used to make the mattress and lasts up to 4 weeks.
Abstract. Polyurethane is widely used, with its two major applications, soft furnishings and insulation, having low thermal inertia, and hence enhanced flammability. In addition to their flammability, polyurethanes form carbon monoxide, hydrogen cyanide and other toxic products on decomposition and combustion.
In addition to asthma, contact dermatitis may also develop from occupational contact with polyurethane (PU) chemicals. 6 cases of allergic contact dermatitis from exposure to PU chemicals were diagnosed in 1974-1990.
Polyurethane is the result of the chemical reaction between a polyol and a diisocyanate. Once the chemical reaction of its components has taken place, the result is a polyurethane foam that is completely inert and harmless to humans.