Antifouling for Props and Shafts - Sail Magazine

Antifouling for Props and Shafts

Ask Sail: Another boater we know treated his prop and shaft with a zinc spray paint (93 percent zinc) that he bought at Home Depot for $10. The zinc spray sounds like a good deal, but before using it I want to know if there is any downside?
Author:
Publish date:
Social count:
0
asksail_antifouling

Dic King of Plymouth, Massachusetts, asks:

Last year several friends and I used a product called PropSpeed from West Marine to protect our props and shafts against fouling. One $300 kit covered about 10 to 12 sailboat props and shafts, and worked very well. Another boater we know treated his prop and shaft with a zinc spray paint (93 percent zinc) that he bought at Home Depot for $10. The zinc spray sounds like a good deal, but before using it I want to know if there is any downside to using a product like this in a marine environment.

Don Casey replies:

DonCasey

A zinc coating should not have any detrimental effect. To the contrary, it should protect the underlying bronze or steel from corrosion, although it should not be used on an aluminum prop. There are a lot of anecdotal reports from boaters who believe zinc coatings keep their props relatively barnacle-free. Results may vary depending on how much time is spent underway, the rotational speed of the prop and the specific fouling environment. If it doesn’t work out, you can always go back to PropSpeed.

As an aside, I keep my prop clean in the tropics with a heavy application of paste wax. I have also heard that surfboard wax works well. It reportedly lasts longer and can be reapplied underwater.

Related

180615-01 Lead

A Dramatic Comeback in the Volvo

After winning three of the last four legs in the Volvo Ocean Race (and coming in second in the fourth), Dutch-flagged Brunel is now tied for first overall with Spanish-flagged Mapfre and Chinese-flagged Dongfeng following the completion of Leg 10 from Cardiff, Wales, to ...read more

MFS-5-2018-Propan-SP02

Tohatsu LPG-powered 5hp Propane Motor

Gassing it UpTired of ethanol-induced fuel issues? Say goodbye to gasoline. Japanese outboard maker Tohatsu has introduced an LPG-powered 5hp kicker that hooks up to a propane tank for hours of stress-free running. Available in short-, long- or ultra-long-shaft versions, the ...read more

TOTW_PromoSite

SAIL's Tip of the Week

Presented by Vetus-Maxwell.Got a tip? Send it to sailmail@sailmagazine.comThink Deeply When chartering, I am always maddened to be told that the echo sounder is calibrated “to depth under the keel, plus a bit for safety.” Such operators seem to imagine that the instrument’s sole ...read more

180612-01 Landing lead

Painful Sailing in Volvo Leg 10

It’s looking to be a case of feast or famine for the 2017-18 Volvo Ocean fleet as it continues the epic struggle that has been Leg 10, with it having been all famine thus far. Painful is the only word to describe the light-air start in Cardiff, Wales, on June 10, as the 11-boat ...read more

01-13_07_180304_JRE_03695_4605

Tips From the Boatyard

Within the Volvo Ocean Race Boatyard sits a communal sail loft which provides service and repairs for all seven teams sailing in the 2017-18 edition of the race. The sail loft employs only five sailmakers who look after 56 sails in each stopover. If you’re thinking, “wow, these ...read more

sailCarwBasicsJuly18

Sail Care for Cruisers

Taking care of your canvas doesn’t just save you money, it’s central to good seamanship  Knowing how to take care of your sails and how to repair them while at sea is an important part of overall seamanship. The last thing any sailor needs is to get caught on a lee shore with ...read more

Ship-container-2048

The Danger of a Collision Offshore

This almost happened to me once. I was sailing singlehanded between Bermuda and St. Martin one fall, and one night happened to be on deck looking around at just the right time. The moon was out, the sky was clear and visibility was good. Still, when I thought I saw a large ...read more

New-MHS-Promo

Multihulls on the Horizon

Fountaine Pajot New 42The French cat powerhouse has been on a roll these last few years, cranking out new models that not only replace their older line but take a step forward in design and user-friendliness. The New 42’s “real” name had not been revealed as we went to press, but ...read more