Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 28-12-2017, 08:08   #16
Moderator
 
roverhi's Avatar

Join Date: Aug 2005
Location: Kona, Hawaii, Carlsbad, CA
Boat: 1969 Pearson 35 #108 & 1976 Sabre 28
Posts: 6,305
Send a message via Yahoo to roverhi
Re: can a unopened can of anti fouling paint last 10 years

Had a left over can of Interlux Micron bottom paint left over from a bottom job. Paint had been opened and a quarter of it used. Used it after 6 years in storage ashore and performed as it did when new. Stirred it with a pretty hefty stick to get the solids off the bottom. Took a bit of stirring but mixed up well with a little more work than a fresh can. Don't see a reason that a sealed can wouldn't last 10 years.
__________________

__________________
Peter O.
'Ae'a, Pearson 35
American Pie, Sabre 28
roverhi is online now   Reply With Quote
Old 28-12-2017, 08:23   #17
Registered User
 
Scout 30's Avatar

Join Date: Oct 2014
Location: Florida
Boat: Scout 30
Posts: 2,760
Re: can a unopened can of anti fouling paint last 10 years

I sure hope it's not a problem because I've got 3 cans of Trinidad that are over 5 years old.
__________________

Scout 30 is offline   Reply With Quote
Old 28-12-2017, 09:19   #18
Registered User
 
powsmias's Avatar

Join Date: Apr 2014
Location: Jersey
Boat: Pearson 35 #285
Posts: 348
Re: can a unopened can of anti fouling paint last 10 years

Quote:
Originally Posted by Jon Hacking View Post
Manny, I don't know, but I wouldn't try.

When we crossed the Atlantic from Cape Town in '81, a 1 year old can of antifouling rusted through and leaked into the bilge. We didn't notice at first, but we did notice that Margi didn't come up for her watch. No problem, she was asleep and there were lots of folks on deck so we stood her watch for her. But then we smelled the paint fumes and realized that we couldn't wake her up. So we carried her up on deck for some fresh air and looked after her as best we could. She eventually woke up about 24 hours later, and seemed fine. But a few years later she developed brain cancer and died, while still in her 20s. I don't know if the events are related, but we now don't carry many old paint cans...
So very sorry to hear of your loss sir, all the best..
__________________
www.eddiethelock.com
powsmias is offline   Reply With Quote
Old 28-12-2017, 11:42   #19
Registered User

Join Date: Dec 2011
Posts: 635
Re: can a unopened can of anti fouling paint last 10 years

The poor guy didn't say anything about keeping a can of bottom paint in his bilge. That's industrial strength stupid. It was a general question about the shelf-life of bottom paint and several responders went off on a bilge storage tangent. If fact keeping bottom paint anywhere on a boat is a dumb idea.

Yes, bottom paint will keep indefinitely. Store it in plastic zip bags or other air-tight sealable wrapping and turning it over once in a while is a good idea. Check frequently for leaks and place the container over a drip pan but don't ever put anything in a metal container in your bilge. If fact don't store anything in the bilge period.
jmschmidt is offline   Reply With Quote
Old 28-12-2017, 11:48   #20
Registered User
 
wrwakefield's Avatar

Join Date: Feb 2011
Location: Cruising Southeast Alaska for now...
Boat: Nauticat 43
Posts: 1,007
Re: can a unopened can of anti fouling paint last 10 years

This spring I used 3- 1 gallon cans of Petit Hydrocoat bottom paint that I had stored for 3+ years. [And never inverted...]

Those cans were made of plastic, so there was no risk of corrosion. [Hydrocoat is water based...]

As advised by the manufacturer, to mix I decanted about 1/3rd of a newly opened can into another container. Then I mixed the copper into the remaining contents in the original 1 gallon can using a drillmotor driven paint stirring paddle.

It was well mixed within about 5 minutes. I then poured the remaining 1/3 back into the original can and finished mixing it all in a minute or two. Once mixed up I poured that into a 5 gallon bucket [leaving no copper or paint behind in the original 1 gallon paint can.

I left the stirring paddle with drill attached in the 5 gallon bucket so I could stir it up a bit every few minutes as I rolled a coat onto the boat.

This approach worked very well, and I could discern no issues with the paint despite my having warehoused it for 3 years.

In case this is useful.

Cheers! Bill
__________________
SV Denali Rose

Short on opinions; focused on research, facts & experience [yours and ours...]
wrwakefield is offline   Reply With Quote
Old 28-12-2017, 12:12   #21
Registered User
 
BlackHeron's Avatar

Join Date: Jan 2016
Location: Chicago -for now...
Boat: Hallberg-Rassy Rasmus 35
Posts: 238
Images: 18
Re: can a unopened can of anti fouling paint last 10 years

Quote:
Originally Posted by jmschmidt View Post
The poor guy didn't say anything about keeping a can of bottom paint in his bilge. That's industrial strength stupid. It was a general question about the shelf-life of bottom paint and several responders went off on a bilge storage tangent. If fact keeping bottom paint anywhere on a boat is a dumb idea.
It could be for a lot of folks here who live aboard full time the idea of storing anything off of the boat just wasn't considered as even an option.
BlackHeron is offline   Reply With Quote
Old 28-12-2017, 12:52   #22
Registered User

Join Date: Sep 2014
Location: Auckland, NZ
Boat: Compass 790 , 7.9 metres or 26 ft
Posts: 500
Re: can a unopened can of anti fouling paint last 10 years

Quote:
Originally Posted by Mannyslv View Post
i was debating with a friend of mine weather or not a can of antifouling paint can last 10 years if it has never been open.

if you flip the can every 3 months lets say, will that help the copper not get stuck together.

would apreciate any comments about this subject
thanks
We used some that was much older than 10 years, took forever to mix up & never did properly actually. Was a bit grainy but worked much better than modern paints. Suspect it may have dated from TBT era but don't know.
Compass790 is online now   Reply With Quote
Old 28-12-2017, 13:25   #23
Marine Service Provider

Join Date: Sep 2011
Location: California
Boat: Alerion Express 38 Yawl
Posts: 350
Re: can a unopened can of anti fouling paint last 10 years

My vote is that the paint in the can last 10 years. I have two precautions:

1. Obviously the can has to be 100% sealed so the volatile components don't evaporate.

2. The solids could possibly settle into a layer that could not be put back into suspension. This is hard with a can of copper-based paint that's six months old, and I presume it would get harder and harder. Turning the can on a regular basis might have some beneficial effect.

I doubt that the motion of the boat would have any effect on keeping the components mixed. Once it separates, I think only an electric mixer would have much beneficial effect.

Chuck
Chuck Hawley is offline   Reply With Quote
Old 28-12-2017, 13:32   #24
Moderator
 
Jim Cate's Avatar

Join Date: May 2008
Location: cruising SW Pacific
Boat: Jon Sayer 1-off 46 ft fract rig sloop strip plank in W Red Cedar
Posts: 13,060
Re: can a unopened can of anti fouling paint last 10 years

Quote:
Turning the can on a regular basis might have some beneficial effect.
Chuck, I suspect that to be useful, the inversions would have to be pretty frequent. Once the solids have settled into a bottom layer they are pretty firm... as evidenced by the resistance to stirring that we've all encountered in a newish tin, just off the shelf at West marine!

But, a power stirrer will resuspend it pretty quickly and evenly IF the volitiles are intact.

Jim
__________________
Jim and Ann s/v Insatiable II in the Pittwater for a few weeks
Jim Cate is online now   Reply With Quote
Old 28-12-2017, 14:32   #25
Registered User

Join Date: Aug 2013
Posts: 36
Re: can a unopened can of anti fouling paint last 10 years

Inverting the cans frequently (not regularly; Halley's comet is regular, every 80 years) might not be a good idea. What if the paint has a memory, likr NiCad batteries, and inverts itself, three months after you apply it.

Personally, I would give it a really good stir with an electric stirrer, then use it. If it fails, it's not going to sink the boat. Ablative paint is not too difficult to remove, in the worst case. And how would you dispose it, if you don't use it?

Alan
AlanR is offline   Reply With Quote
Old 28-12-2017, 14:56   #26
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: C.L.O.D.
Posts: 8,548
Re: can a unopened can of anti fouling paint last 10 years

Quote:
Originally Posted by AlanR View Post
Inverting the cans frequently (not regularly; Halley's comet is regular, every 80 years) might not be a good idea. What if the paint has a memory, likr NiCad batteries, and inverts itself, three months after you apply it.

This only happens to flat paints, not full gloss etc

Personally, I would give it a really good stir with an electric stirrer, then use it. If it fails, it's not going to sink the boat. Ablative paint is not too difficult to remove, in the worst case. And how would you dispose it, if you don't use it?

Alan
Leave it unopened in any boatyard, it will soon be re-homed...
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is online now   Reply With Quote
Old 28-12-2017, 16:36   #27
Registered User
 
hamburking's Avatar

Join Date: Feb 2013
Location: Kingston Ont Canada
Boat: Looking for my next boat!
Posts: 2,568
Re: can a unopened can of anti fouling paint last 10 years

I always buy bottom paint from the "clearance" section of the boat store...so I just assumed they were always very old. Takes a fair bit of stirring, but always seemed to work like new.

I learned early on that stuff like paint, acetone, and the really toxic stuff (cleaners) should be left at home. For weekend sailors and canadians this works just fine. If you are cruising, buy it just before you use it. Its difficult enough to store things like gasoline, diesel fuel, and stove alcohol on the boat!

Every boat I've bought has always included a locker or 3 FULL of cleaners and paints...almost always NEVER USED. I've found that people are very gung-ho to spruce up their boats when in the boat store...less so when the chore actually needs to be done. I've also found that if you don't power wash last years bottom paint off the hull, it actually lasts a few years. I'm sure the manufacturers are delighted to sell the same overpriced products to most boaters every single year. Canadian winter is just as effective as a power wash, and it leaves the bottom paint intact. Might not look as pretty as a shiny new coat, but I've had no complaints from the fish.
hamburking is offline   Reply With Quote
Old 28-12-2017, 22:17   #28
Senior Cruiser
 
hzcruiser's Avatar

Cruisers Forum Supporter

Join Date: Aug 2008
Location: Sydney, Australia
Boat: Roberts 45
Posts: 403
Re: can a unopened can of anti fouling paint last 10 years

Quote:
Originally Posted by Jon Hacking View Post
Manny, I don't know, but I wouldn't try.

[...]
But then we smelled the paint fumes and realized that we couldn't wake her up. So we carried her up on deck for some fresh air and looked after her as best we could. She eventually woke up about 24 hours later, and seemed fine. But a few years later she developed brain cancer and died, while still in her 20s. [...] .
Very sad story, Jon!

There is little doubt that paint thinner, like glue sniffing, damages the brain cells. Not sure if it relates to cancer, but better safe than sorry, of course!

I keep left over paint, thinners, deck oils, brushes etc in a large locker under the quarter berth and check it regularly (as in, whenever I need to touch up a bit of rust or re-do the varnish, hence at least 4 times a year).

Never had a can develop rust on the outside (or inside), the locker is perfectly dry. As for the contents, I sometimes get a pretty thick skin on top of the paint which I cut off with a long screwdriver, mix up the rest and use that with no noticeable ill effect.

If it's oil based I now pour a bit of thinner on top of the paint before closing the lid. I also put a layer of glad wrap over the can before closing the lid to make it more air tight.
__________________

__________________
Fair winds,
heinz
hzcruiser is offline   Reply With Quote
Reply

Tags
anti fouling, paint

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
What Is the Best Anti-Fouling Bottom Paint irwinsailor Construction, Maintenance & Refit 204 04-04-2017 05:00
What is the Best Anti fouling Paint seagypsywoman Construction, Maintenance & Refit 77 02-03-2012 11:05
Anti-Fouling Paint dakno Construction, Maintenance & Refit 9 31-12-2009 08:53
Proper Application of Anti-Fouling Paint BubbleHeadMd Construction, Maintenance & Refit 5 07-12-2009 14:48



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 14:53.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.