I think any drug like " tetracycline" will kill lots of germs and bacteria but will dissolve so fast in water, it will be gone in a few days. I wouldn't add anything to bottom paint for fear of jeopardizing the adhesion and slow release of it's own toxins. I've heard of people mixing in "Round Up" and I've heard the same people complain that their paint flaked off during haulout. I ask them if they sanded with 80 grit paper before painting as directed, and can tell by their confused expression, they never read the directions.
I respect the guys who write the application instructions, follow those as close as I can and I've enjoyed great success. I understand your frustration with VC-17. I used VC-Offshore for 8 years and got fed up with the fouling. Had to clean the bottom each week to stay ahead of it. Used a piece of carpet and sometimes a 3M pad. Switched to a better paint, Micron 66, and love it. Kept the boat in all winter and the fouling looked pretty bad this May. All the boats in y marina had a fur attached to their hulls. I was surprised how easy it came off easily with a soft deck brush, and very little pressure. Micron 66 is designed for Salt Water and Fresh Water requires "Micron Extra" I think. Both can be burnished, but the paint goes on very smooth as is, and by design gets smoother as it ablates. They are multi season hard abatives. Chuck Resolute 1990 C&C 34R Broad Creek, Magothy River, Md ----- Original Message ----- From: "S Thomas via CnC-List" <cnc-list@cnc-list.com> To: cnc-list@cnc-list.com Cc: "S Thomas" <sthom...@bellnet.ca> Sent: Tuesday, June 30, 2015 8:23:54 PM Subject: Re: Stus-List Bottom paint -ingredient change Rick, I decided to try your friend's suggestion, but with the veterinary grade tetracycline since that is all that is available to us mere mortals who are not M.D.s. The stuff I bought from the local farm supply is 25% tetracycline by weight and whatever makes up the rest of it is not mentioned on the packaging. I used about a rounded teaspoon in a quart of VC17 and it seemed to work ok mix and application wise but with one big problem. The veterinary stuff consists of particles the size of fine sand, instead of the fine powder used in the gel caps fit for humans. I should have ground it up into a fine powder first, but I was in a hurry and not wearing my reading glasses. The result was as you might expect from this description. The surface texture of paint with bits of fine sand mixed in here and there. Live and learn, and a word to the wise. Make sure that anything you add to paint is ground up super fine. Seems obvious I know, but being in a hurry tends to make me stupid. Steve Thomas C&C27 MKIII Port Stanley P.S. Finally in the water, as of yesterday afternoon. <blockquote> ----- Original Message ----- From: Rick Brass via CnC-List To: 'Jean-Francois J Rivard' ; cnc-list@cnc-list.com Sent: Thursday, March 19, 2015 09:57 Subject: Re: Stus-List Bottom paint -ingredient change A number of years ago, a friend who is a physician, and also the owner of a big Cape Dory, gave me a bottle of Tetracycline antibiotic that was past its expiration date and told me to mix it into my bottom paint. That’s what he said he did for anti-slime additive, back in the days before paints with SR in the name, when you had to pay the marina to put anti-slime additive in the paint. Damn! My bottom was really clean between bottom paintings. I have since been told that you can purchase antibiotics for use on horses at many farm stores that cater to stables. I suppose it is not a good idea to tell your local version of the EPA if you chose to do this. (And in case anyone from the government is listening, I use Petit Ultima SR 60 on both my boats.) Rick Brass Washington, NC From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Jean-Francois J Rivard via CnC-List Sent: Thursday, March 19, 2015 9:03 AM To: cnc-list@cnc-list.com Subject: Stus-List Bottom paint -ingredient change In Practical Sailor's tests" Irgarol has not been shown to extend the active life of antifouling paints in our tests, and we’ve had a hard time discerning any enhanced slime resistance in Irgarol-boosted paints after six months in the water. " </blockquote> _______________________________________________ Email address: CnC-List@cnc-list.com To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
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