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Old 03-28-2018, 08:15 PM   #1
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Propeller Zinc Spray Paint

Good evening Trawler friends!

Any advice for this product? Just saw this at West Marine and Iím wondering if itís worth it. I run about 7 Knots and 120 hours per year on my single engine Mainship in the Middle Chesapeake Bay. Thoughts?

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Old 03-28-2018, 08:32 PM   #2
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Propeller Zinc Spray Paint

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Originally Posted by HeatherAlyssa View Post
Good evening Trawler friends!

Any advice for this product? Just saw this at West Marine and Iím wondering if itís worth it. I run about 7 Knots and 120 hours per year on my single engine Mainship in the Middle Chesapeake Bay. Thoughts?

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Oh I wish.
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Old 03-28-2018, 08:39 PM   #3
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It is used here by some of the best yards in our area, when we haul the boat this year I will know first hand. Lots of friends use it and really like it!
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Old 03-28-2018, 08:45 PM   #4
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It works for me in the Northwest. Boat hauled today, after a year and the only growth on prop, was on the nuts, which had a carpet of barnacles.
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Old 03-28-2018, 09:10 PM   #5
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Thank you for the response. Man... that can of spray paint is not cheap.
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Old 03-28-2018, 09:26 PM   #6
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Thank you for the response. Man... that can of spray paint is not cheap.
Compared to Propspeed, the price might look pretty good.
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Old 03-28-2018, 09:35 PM   #7
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You can get the same "Cold ZINC Spray by Rustoleum at lowes/home depot for $7.99. It does work but only for about 18 months in my experience. Doubt it would last on hi speed props but on Trawlers and their 2:1 and 3: 1 at 1800rpm---------OK
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Old 03-28-2018, 09:36 PM   #8
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You can get the same "Cold ZINC Spray by Rustoleum at lowes/home depot for $7.99. It does work but only for about 18 months in my experience. Doubt it would last on hi speed props but on Trawlers and their 2:1 and 3: 1 at 1800rpm---------OK
Also good to spiff up chains and anchors
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Old 03-28-2018, 10:03 PM   #9
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"Galvafroid" comes in brushable liquid form as well as spray. Usually cheaper, and you could load more on. Their website doesn`t mention antifouling use,but it seems a similar product.
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Old 03-28-2018, 10:41 PM   #10
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"Galvafroid" comes in brushable liquid form as well as spray. Usually cheaper, and you could load more on. Their website doesn`t mention antifouling use,but it seems a similar product.
just an fyi, you can get the rustoleum stuff in qt. cans as well.
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Old 03-28-2018, 10:42 PM   #11
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Does electric shock kill barnacles?
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Old 03-29-2018, 05:41 AM   #12
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I've been using it for two for 2 years and have been happier with it than Propspeed. My propeller only turns about 600 rpm at cruise, so it's not fast enough to throw the barnacles off. As I only go 7 knots, ablative paint doesn't work well either. May try the Rustoleum next haul out.

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Old 03-29-2018, 06:08 AM   #13
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I’ve been using I for about five years and works for me here on the Chesapeake bay. I buy mine on the internet a lot cheaper.
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Old 03-29-2018, 06:24 AM   #14
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Originally Posted by HeatherAlyssa View Post
Good evening Trawler friends!

Any advice for this product? Just saw this at West Marine and Iím wondering if itís worth it. I run about 7 Knots and 120 hours per year on my single engine Mainship in the Middle Chesapeake Bay. Thoughts?

Barnacle Barrier has worked well for us in the Chesapeake. In fact, we just had a diver go below in Charleston before our return trip, and he told me props and running gear are absolutely clean.

Rustoleum makes a similar cold galvanizing spray-on product that folks have said is virtually the same stuff (from their reading of the MSDS)... for something like $5/can. Haven't tried that.

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Old 03-29-2018, 06:48 AM   #15
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Barnacle Barrier has worked well for us in the Chesapeake. In fact, we just had a diver go below in Charleston before our return trip, and he told me props and running gear are absolutely clean.

Rustoleum makes a similar cold galvanizing spray-on product that folks have said is virtually the same stuff (from their reading of the MSDS)... for something like $5/can. Haven't tried that.

-Chris
So, high rpm has no effect regarding reduced durability on prop blades??
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Old 03-29-2018, 07:11 AM   #16
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depending on how you use your boat and water flow/salinity all can affect growth.

so sometimes it is hard to know the actual effect of a product outside of scientific testing or exact same usage/location of a boat through many years.

anecdotally, I have had meager results from spraying my prop with either zinc spray.

but my boat sits for 5 months, then is constantly moving for 7 months.

I have found my bolt on zincs last longer...and the last 2 years I went ahead and bottom painted my prop and rudder over a nice coating of zinc which made a good primer.

the paint wears off the prop tips, but much of the zinc remains.

I still get barnacles after a couple months if sitting in an extreme fouling area, but less than nothing at all.

I usually run my engine in gear oretty hard for 15 or 20 minutes every month which I also think helps sling growth off...or at least get rid of the slime ehich other growth seems to need to start.

Bottom line....for what $10 a can us or minus if you buy generic...I will continue to use it till my boating situation changes and I find I need more or less protectiln for my running gear.
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Old 03-29-2018, 07:41 AM   #17
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I use it on the propellers, works well.
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Old 03-29-2018, 08:15 AM   #18
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Originally Posted by geoleo View Post
You can get the same "Cold ZINC Spray by Rustoleum at lowes/home depot for $7.99. It does work but only for about 18 months in my experience. Doubt it would last on hi speed props but on Trawlers and their 2:1 and 3: 1 at 1800rpm---------OK
We used the Rustoleum cans for maybe 8 years with vey good results on boats that typically travelled at 16-17 knots cruise in the Northeast. The first year of use we sprayed one prop with the Rustoleaum and one with the Petit and saw no appreciable difference. We pulled the boat in winter as a matter of need and refreshed the bottom each year as a matter of course.
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Old 03-29-2018, 08:18 AM   #19
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Does electric shock kill barnacles?
Yes - both sonic vibration and electric current has shown to deter barnacle growth. The sonic systems have seen limited results with other undesirable requirements and the electric current required typically causes electrolysis from what I have read.
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Old 03-29-2018, 08:47 AM   #20
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We used it for the first time a few months ago on a reco from a diver or two. According to them, you need a LOT of coats (5+) for the best results. we aren't into growth season yet so I hesitate to comment on how it is working so far, but so far so good (for all the good THAT does) :-) The boat yard also spoke highly of it but did say it is a bear to remove if you ever need to... and I don't know if that will have to happen if/when we haul again next year.
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