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Barnacles on Thru-Hull Transducer

Old 01-14-2003, 07:19 PM
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Default Barnacles on Thru-Hull Transducer

New here and hope someone can help.
Is there any way to prevent build up of barnacles on the face of a Thru-hull transducer?
By season end, we always end up with it covered.

Thanks for the help.
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Old 01-14-2003, 10:13 PM
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Default Barnacles on Thru-Hull Transducer

The marine stores sell a little bottle of antifouling transducer paint that seems to work pretty well. I've often wondered if it isn't just repackaged bottom paint. In fact, I'm curious as to how many people paint their transducers with regular bottom paint? It's taken as gospel in some quarters that bottom paint shouldn't be used . . . anybody know why? I mean, if you can shoot through a hull with bottom paint why would actually painting a transducer have a negative effect?

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Old 01-15-2003, 06:13 AM
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Default Barnacles on Thru-Hull Transducer

It is not re-packaged bottom paints, since the heavy metals in some bottom paints can confuse the signal from the transducer. These paints work ok, but need to be applied more often than standard bottom paints in order to achieve lasting protection.

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Old 01-15-2003, 07:43 AM
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Default Barnacles on Thru-Hull Transducer

my impression is that the "special" bottom paint will not attack the plastic (usually polyurethane), that surrounds the ducer element.
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Old 01-15-2003, 08:14 AM
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Default Barnacles on Thru-Hull Transducer

If the Dolphinite "Go Fast" paints mentioned in the Boater's forum would work.

I don't believe they use heavy metals in their formulation, and they are supposed to last for a full season.

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Old 01-15-2003, 08:47 AM
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Default Barnacles on Thru-Hull Transducer

Big E,
I was wondering the same thing. In that I am contemplating a new boat purchase, I hope the boys down south can give us some preliminary feedback on the Dolphinite product. Would be great to know some results before we have to paint and launch this spring.
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Old 01-15-2003, 07:48 PM
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Default Barnacles on Thru-Hull Transducer

Thanks for the feedback.
I'd been told not to paint it but after a season in the salt it gets covered and obviously interfers with the reading.
Is this dolphinite paint a large quantity bottom paint or small amounts like the other transducer paint mentioned?

thanks guys.
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