[C38] Bottom paint

[Tom T.]

Or you could sail your boat to the Bahamas or some other foreign country and get some tri-butyl tin bottom paint like we used to use here before it was outlawed.

I don't know if tin was actually really all that dangerous to the environment or did it just last too long and the paint manufacturers lobbied for paints they could sell more of?

I'm just rambling here but just about every other country still uses tin based paints as far as I know and they seem to have no problem with fish endangerment.  Some American yachts go outside the USA for their bottom painting just to get the outlawed tin based paints.

Tom Troncalli
The Renata #95, barnacles and all
St. Pete, Fla, (warm water home of hull clinging, speed killing, nasty,ugly, hitch hiking ecosystems.)


----- Original Message ----- 
From: Don Strong 
To: Catalina 38 Listserve
Sent: 3/1/2007 9:10:43 AM 
Subject: Re: [C38] Bottom paint


Phil. 
    Wasington's prohibition against in-water scrubbing is interesting. Last time around we got 4 years from our bottom job in San Francisco Bay with Trinidad regular and twice annual diver gentle scrub. It would be interesting to learn the rationale against in-water scrubbing. If it leads to more frequent bottom jobs, it could lead to more pollution unless every site where a bottom job is done is an advanced catchment with well regulated toxics removal and disposal. Even then, more frequent bottom jobs means more toxic paint in land fills.
    The slime is an issue, indeed. Fast sailing for long periods does reduce it.
regards, Don

Rich West wrote: 
I've been really happy with Trinidad SR on my boat in Los Angeles.  It is much better at reducing slime than the plain old Trinidad I had on before and it's been lasting very well.

Are you sure it's a hard paint?  When I touch it with a rag, clouds of red come off into the water.

Rich West
Legacy, #360




From: listserve-bounces at catalina38.org [mailto:listserve-bounces at catalina38.org] On Behalf Of eyriepg at comcast.net
Sent: Wednesday, February 28, 2007 7:59 PM
To: Catalina 38 list
Subject: [C38] Bottom paint


I have been using Micron CSC ablative copolymer paint for the last 9 years.  It works well at keeping the barnacles for several years off but does little to reduce the speed robbing slime.  I did a test stripe on my rudder about 4 years ago with the same type of paint with a biocide and could see little difference.  It is illegal in WA to scrub the bottom in the water and a haulout and pressure wash are costly.  I am thinking about changing to Trinidad SR hard paint which is legal to scrub.  Marine growth is slow here in our cold water.  How effective is it in reducing slime?  Is there a better alternative?  There have been several articles in sailing magazines lately about new bottom paints, but I value your experience more.

Since I will have to remove all of the ablative paint to use the modified epoxy or any other non ablative paint, I want to be sure that it is the way to go.

Phil Gay
C38 049 Que Linda
Everett, WA

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-- 
Donald R. Strong
Professor
Section of Evolution and Ecology
University of California Davis
95616
530 752 7886
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