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Author Topic:   Bottom Paint as Grass Killer

Jefecinco posted 07-11-2013 08:04 PM ET (US)
Last year I decided to repaint the bottom of my recently acquired Sport 13.
After reading up on the project and soliciting advice from this forum I proceeded with the project after getting some help for a neighbor.
As advised we got the 13 off the trailer and turned it turtle. I then proceeded to give the bottom a good sanding and applied a couple of coats of Petit Hydrocoat ablative antifouling bottom paint.
A few weeks ago I noticed a patch in my back yard where the grass had died.
It took a while but I finally realized the dead spot was precisely where I had sanded the old bottom paint. Yes, the old paint sanded off the bottom was, though old, still an effective biocide.
Keep this in mind if you decide to do a back yard bottom painting project. Although it should have seemed obvious it just never occurred to me.
Although struggling the grass is beginning to grow again.
Butch

jimh posted 07-11-2013 09:51 PM ET (US)
I had the same outcome when I removed some bottom paint from the hull of my prior Boston Whaler boat. Small bits of bottom paint are quite effective at killing the lawn.
Tom W Clark posted 07-12-2013 12:45 AM ET (US)
Dead grass? No shizzle. Anti-fouling bottom paint is a biocide.
bio: of or relating to life
cide: denoting a substance that kills
Bottom paint is very nasty stuff. It should not be dealt with casually. In many states there are fairly severe penalties for dealing with bottom paint casually and letting it escape into the environment, even if that is your own lawn.
macfam posted 07-12-2013 07:12 AM ET (US)
Whenever I'm sanding bottom paint , I use a dedicated sander with the 80 grit, 8 hole,Velcro sanding discs. The sander conveniently attaches to my shop vacuum to pull-in the anti- fouling dust. Of course this still requires me to wear gloves and respiator mask etc.
"After the dust settles", I empty the contents into a large rubbish bag, (very gently with mask on) including the vac filter, and dispose properly. Works pretty well.
TWC, love the "no shizzle"!!
I'm stealing that one.......
Jefecinco posted 07-12-2013 10:37 AM ET (US)
Yes, it was thoughtless of me to make such a mistake. I was pretty annoyed with myself for my failure to even consider any adverse consequences. My ego is slightly less bruised after learning our moderator had a similar experience. Jim, thanks for sharing.
Tom, I try to be considerate to our environment and do what I can to help. Rules and regulations aside I just try to be a good citizen and, for the most part, feel fairly successful. If there is a good side to the story it is that I only sanded enough to prepare the old paint for fresh paint and only a small amount found it's way into the environment.
Macfam, thanks for the excellent tips for others who take on similar projects.
I think it's pretty obvious the purpose of my post was to remind others to use their noodles a little before embarking on a project. Thanks for the support.
Butch
dcarson87354 posted 07-12-2013 11:20 AM ET (US)
Kills grass you say? maybe thats just the ticket I need to kill some of these dang thorny vines!
Binkster posted 07-12-2013 10:23 PM ET (US)
I hope you wore a respirator mask and gloves as macfam does, otherwise your lungs will soon be drying up like your grass. As Tom says bottom paint is nasty stuff.
rich
Jefecinco posted 07-13-2013 10:25 AM ET (US)
Rich,
I'm out of luck. I failed to wear a respirator or gloves. I have found myself struggling to run my previously normal 10 kilometers and have been blaming it on 95 percent relative humidity at 90 degrees Fahrenheit. Now I know it was the damn bottom paint dust. Thanks for that.
I did wear a dust mask. I hope I'll survive.
Butch
Marsh posted 07-16-2013 10:00 PM ET (US)
Wonder if it would make a dent in the hydrilla that has taken over our lakes in the last couple of years? Fluoridone is expensive!

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Author	Topic: Bottom Paint as Grass Killer
Jefecinco	posted 07-11-2013 08:04 PM ET (US) Last year I decided to repaint the bottom of my recently acquired Sport 13. After reading up on the project and soliciting advice from this forum I proceeded with the project after getting some help for a neighbor. As advised we got the 13 off the trailer and turned it turtle. I then proceeded to give the bottom a good sanding and applied a couple of coats of Petit Hydrocoat ablative antifouling bottom paint. A few weeks ago I noticed a patch in my back yard where the grass had died. It took a while but I finally realized the dead spot was precisely where I had sanded the old bottom paint. Yes, the old paint sanded off the bottom was, though old, still an effective biocide. Keep this in mind if you decide to do a back yard bottom painting project. Although it should have seemed obvious it just never occurred to me. Although struggling the grass is beginning to grow again. Butch
jimh	posted 07-11-2013 09:51 PM ET (US) I had the same outcome when I removed some bottom paint from the hull of my prior Boston Whaler boat. Small bits of bottom paint are quite effective at killing the lawn.
Tom W Clark	posted 07-12-2013 12:45 AM ET (US) Dead grass? No shizzle. Anti-fouling bottom paint is a biocide. bio: of or relating to life cide: denoting a substance that kills Bottom paint is very nasty stuff. It should not be dealt with casually. In many states there are fairly severe penalties for dealing with bottom paint casually and letting it escape into the environment, even if that is your own lawn.
macfam	posted 07-12-2013 07:12 AM ET (US) Whenever I'm sanding bottom paint , I use a dedicated sander with the 80 grit, 8 hole,Velcro sanding discs. The sander conveniently attaches to my shop vacuum to pull-in the anti- fouling dust. Of course this still requires me to wear gloves and respiator mask etc. "After the dust settles", I empty the contents into a large rubbish bag, (very gently with mask on) including the vac filter, and dispose properly. Works pretty well. TWC, love the "no shizzle"!! I'm stealing that one.......
Jefecinco	posted 07-12-2013 10:37 AM ET (US) Yes, it was thoughtless of me to make such a mistake. I was pretty annoyed with myself for my failure to even consider any adverse consequences. My ego is slightly less bruised after learning our moderator had a similar experience. Jim, thanks for sharing. Tom, I try to be considerate to our environment and do what I can to help. Rules and regulations aside I just try to be a good citizen and, for the most part, feel fairly successful. If there is a good side to the story it is that I only sanded enough to prepare the old paint for fresh paint and only a small amount found it's way into the environment. Macfam, thanks for the excellent tips for others who take on similar projects. I think it's pretty obvious the purpose of my post was to remind others to use their noodles a little before embarking on a project. Thanks for the support. Butch
dcarson87354	posted 07-12-2013 11:20 AM ET (US) Kills grass you say? maybe thats just the ticket I need to kill some of these dang thorny vines!
Binkster	posted 07-12-2013 10:23 PM ET (US) I hope you wore a respirator mask and gloves as macfam does, otherwise your lungs will soon be drying up like your grass. As Tom says bottom paint is nasty stuff. rich
Jefecinco	posted 07-13-2013 10:25 AM ET (US) Rich, I'm out of luck. I failed to wear a respirator or gloves. I have found myself struggling to run my previously normal 10 kilometers and have been blaming it on 95 percent relative humidity at 90 degrees Fahrenheit. Now I know it was the damn bottom paint dust. Thanks for that. I did wear a dust mask. I hope I'll survive. Butch
Marsh	posted 07-16-2013 10:00 PM ET (US) Wonder if it would make a dent in the hydrilla that has taken over our lakes in the last couple of years? Fluoridone is expensive!