Mildewed Bathroom Caulking


Related Articles

Caulking Around Toilets

Updating a Bathroom

First Aid for the Bathroom

Dear NH,
Where can I purchase polyurethane caulk? It is to be used in a shower stall. I have been using silicone but I have been experiencing mold problems. I understand that this does not occur when polyurethane is used.
PW from Schaumburg, IL

Dear PW,
Polyurethane caulk is available in many home and hardware stores. However, I don't believe that there is a polyurethane caulk available specifically for bathroom use... yet. In my experience, even manufacturers who produce polyurethane do not recommend using it in bath enclosures. Part of the reason may be that polyurethane is not as mildew resistant as the best "mildew-proof" acrylic latex caulks, manufactured by companies such as MD (Macklanburg-Duncan) and Polyseamseal.


It is a given that polyurethane is superior in both adhesive ability and flexibility (or "stretchiness") than either latex or silicone caulks. This is great in some applications, especially exterior joints where there is significant seasonal expansion and contraction. It is not generally necessary in bath enclosures. The stress on the joints in bath applications is just not that great, so the additional adhesive strength is essentially overkill! Since ALL bathroom caulks eventually become mildewed or simply loosen, the extra adhesive strength may even work against you come repair time!

calculator iconCalculator: Should you borrow from your home equity?

As far as mildew resistance goes, I would choose acrylic latex caulk over silicone caulk any day, especially the "mildew proof" varieties mentioned earlier. This is from personal experience with miles of mildewed caulk!
NH

COPYRIGHT 1999 G.G. ALONZY


Have a small home repair question for THE NATURAL HANDYMAN? Just click here naturalhandyman.com/aitikia. For more home repair information, visit NH's growing list of original home repair articles and quality links naturalhandyman.com. If this information has been valuable to you, please consider making a small donation to support NH's free service to the home repair community! For more information, please visit our "Friends" page naturalhandyman.com/friends.

The Natural Handyman Site Directory

Take the Next Step

  • Get more great time and money saving ideas in your inbox. Subscribe to Dollar Stretcher Tips newsletter, a twice weekly look at how to stretch your day and your dollar!
  • Visit our Pinterest board for Home Improvement Tips.
Stay Connected with TDS










Subscribe to TDS Newsletters

All subscribers receive Dollar Stretcher member perks!

The Dollar Stretcher
Dollar Stretcher Parents
Dollar Stretcher Tips
After 50 Finances
Surviving Tough Times
Financial Independence
The Computer Lady


Join over 250,000 other subscribers
to get your member perks!


Your Email:


View the TDS Privacy Policy.




Get Out of Debt