Remove black mold spots?

[Seaduction]

The white caulk in the small drainage u-groove around the outer edge of my cockpit deck has some black mold looking spots. Any idea how to remove these spots? Most of the mold removal cleaners don't work.

 

[jlazzfp]

Try some bleach and soft soap with a soft brush.

 

[dstroyed]

If bleach doesn't do if for you google MMR ( mold remover ) or Concrobium. We us both of these for our Mold Remediation projects to remove mold staining. MMR has a very strong chlorine smell and bleaches out cloths and will etch finished metals. Concrobium doesn't have the same aggressiveness and doesn't work as well. They claim you can pretty much use it on anything.

One of the biz partners used MMR on his fishing boat to get the stains off the cover and upholstery He was very pleased with the results. The materials were white to begin with.

On other thing MMR has a shelf life. Concrobium is powder so if it does have a shelf life it will be significantly longer. I will confirm MMR shelf life is a fact and it does loss its strength.

Good Luck.

 

[Avalon]

Some of my 310 black spots were voids in the caulk, cured with a dab of caulk.

 

[Seaduction]

The caulk line still looks new in most cases, just some black spots developed from standing water over the past few months. Will try the bleach/soft scrub solution....if not will try dstroyed's suggestion.

Thanks!