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      • Is solid wood T-1-11 safe for interior use?
      • Can a wood butcher block countertop be permanently sealed?
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      • How do I know if a product is really safe?
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Learning Center > Green Home Guide Articles > 
Green Home Guide Articles

Our newly-installed kitchen sink has a terrible toxic smell. What can we do?

by
Joel Hirshberg Originally published August 30, 2012 in the Green Home Guide, a service of the U.S. Green Building Council

Q: Our newly-installed kitchen sink has a terrible toxic smell. We suspect it's from the underside spray coating. What can we do? There is no padding underneath, as I've seen mentioned in previous posts. It's an undermount sink with white spray coating. Do we seal it? Try removing it? Concerned about what the spray is made from and releasing new toxins in removal process.
—Asked by Jonathan, Atlanta, GA

A: The spray coatings under many sinks are usually designed to help soundproof the sink. They are acoustical insulators. Although I have no way to verify what it is from your description, it is usually made of some type of high density spray foam or mass-loaded vinyl. In either case, the odor and toxic byproducts usually dissipate quickly.

In the mean time, it could be hazardous to your health should you work around the sink for extended periods of time. I'd suggest some serious ventilation such as fans, open windows, and air purifiers. I've written another Green Home Guide article regarding this topic that might be useful: Safest primer to get rid of tobacco smells.

We have sealers for almost every type of toxic odor but we need to know what we are dealing with.

My hunch is that it is not the white stuff underneath the sink because it would have been sprayed in a factory months ago and would not be as intense for this long. Our company takes calls on smelly objects every single day for the past 21 years and we've never heard complaints about this particular problem.

The real problem may lie with the adhesive/caulk/sealant used to adhere the sink to the countertop. Often contractors use a product that contains solvents or silicones that smell badly. If that is the case, they are difficult to remove or seal. However, their off-gassing usually does not last too long.

Another possibility might come from the adhesive used by the plumber to connect the drain to the trap. Often PVC cement is extremely nasty and people complain about this regularly. Again, this rarely lasts long and there are no sealers for this as far as I know.

Removing the sink may reveal the problem as you will be able to get your nose closer to the source. Once you can isolate the problem, call me and we will try to work out a solution.


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