Half life of "don't combine bleach" products

July 25, 2017 8:12 PM

I've used several products on my bathtub to clean the grout, the latest around 4 weeks ago. The products say "do not combine with bleach" (one was Bar Keepers friend). I want to clean the grout with a bleach pen. Is this safe? When will it be safe or how can I make it so?
posted by sandmanwv to Home & Garden (2 answers total)

Best answer: That warning generally means "do not combine with bleach at the time you are using the bleach because doing so will cause a chemical reaction and you may inadvertently gas yourself." You should be fine to use it after the fact.
posted by coppermoss at 8:33 PM on July 25, 2017 [11 favorites]

Both bleach and ammonia evaporate fairly readily. If your grout isn't still wet with ammonia solution, you're fine
posted by aubilenon at 9:16 PM on July 25, 2017 [5 favorites]