Anonymous
Post 11/15/2023 12:09     Subject: What is the white powdery substance under bathroom sink?
I'm having the same problem too, it's sooo annoying 😒 and my house is only 3yrs old 🙃 😑
Anonymous
Post 09/01/2023 19:47     Subject: What is the white powdery substance under bathroom sink?
Mold?
Anonymous
Post 09/01/2023 12:14     Subject: What is the white powdery substance under bathroom sink?
Did anyone find a fix? I have the same problem?
Anonymous
Post 05/10/2021 08:51     Subject: What is the white powdery substance under bathroom sink?
I’m having the same issue. It is coming from the sink underside. It’s not cocaine or construction dust or from movement of the countertop. It’s everywhere every time you shut a door or drawer. I don’t advise snorting any of this as it looks like silica dust. I’m going to try clear car enamel in a spot to see if it creates a deadly fume or fixes the problem
Anonymous
Post 11/24/2019 15:08     Subject: What is the white powdery substance under bathroom sink?
Coke.
Anonymous
Post 11/24/2019 14:16     Subject: Re:What is the white powdery substance under bathroom sink?
Meant to say wipe once a week Inside cabinets not Shioe :)
Anonymous
Post 11/24/2019 14:13     Subject: What is the white powdery substance under bathroom sink?
[quote=Anonymous]It sounds like efflorescence. Don't use hairspray, it won't stop the problem. Google how to remove efflorescence from marble.[/quote]
All the rooms with this cultured marble top this white substance since we built house from the beginning but now I want to get rid off it. I normally just Shioe once a week inside cabinets . But from quick google search not sure if efllorescense.
Anonymous
Post 11/24/2019 11:32     Subject: What is the white powdery substance under bathroom sink?
It sounds like efflorescence. Don't use hairspray, it won't stop the problem. Google how to remove efflorescence from marble.
Anonymous
Post 11/24/2019 05:08     Subject: Re:What is the white powdery substance under bathroom sink?
[quote=Anonymous]OP here the substance is backing of cultured marble countertop . It just not staying on but shedding . Anyone know how to seal it without hairspray ?[/quote]

I would think any kind of spray sealer would work. Polyurethane? KILZ?
Anonymous
Post 11/24/2019 00:11     Subject: What is the white powdery substance under bathroom sink?
Is there movement of the bottom of vanity top against the top of vanity? Maybe the movement is rubbing off some of the bottom of the vanity top, so it falls into your drawers.
Anonymous
Post 11/23/2019 15:02     Subject: Re:What is the white powdery substance under bathroom sink?
OP here the substance is backing of cultured marble countertop . It just not staying on but shedding . Anyone know how to seal it without hairspray ?
Anonymous
Post 11/23/2019 13:13     Subject: What is the white powdery substance under bathroom sink?
Ajax?
Anonymous
Post 11/23/2019 13:10     Subject: Re:What is the white powdery substance under bathroom sink?
Anonymous wrote:cocaine?


That’s my guess too!
Anonymous
Post 11/23/2019 10:14     Subject: Re:What is the white powdery substance under bathroom sink?
cocaine?
Anonymous
Post 11/23/2019 00:15     Subject: What is the white powdery substance under bathroom sink?
I noticed this white powdery substance shedding inside bathroom vanity cabinets . The cabinets are oak and counter top builder grade double sink cheap cultured marble. The the inside of top drawer has this powdery stuff and under sink as well . How can I stop it? Someone suggested to spray hairspray. But why is it shedding and what is it ? It’s getting on my personal items . I want to be able to use all drawers .