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Respiratory selection
Posted: Sat Mar 03, 2012 12:17 am
by Steven
I have a 3m respirator with dust cartirdges. I used it for painting the GV11 with Brightsides using the appropriate cartridges. Worked well. I want to purchase a new one for painting the OB19. I'm using Interlux Perfection, which I know is more toxic than the Brightsides. Is there a particular rating I should be looking for?
Re: Respiratory selection
Posted: Sat Mar 03, 2012 12:42 am
by Prarie Dog
Good question Steven, I was looking at them at Home Depot tonight and couldn't figure out what to buy because of the paint. I hear Sterling is some toxic stuff. Can't wait for this answer.
Re: Respiratory selection
Posted: Sat Mar 03, 2012 12:52 am
by gstanfield
If it contains Isocyanates then anything short of a supplied air respirator is mostly false comfort. This is based on the stuff we were taught at WyoTech when dealing with automotive paints.
I still spray some with a particulate mask (cartridge type like you have) and know many paint techs who do the same, but that doesn't mean it's a good idea
Do you have a MSDS sheet on the paint you are using?
Re: Respiratory selection
Posted: Sat Mar 03, 2012 9:25 am
by Cracker Larry
Re: Respiratory selection
Posted: Sat Mar 03, 2012 12:09 pm
by cali123
Re: Respiratory selection
Posted: Sat Mar 03, 2012 1:12 pm
by rjezuit
I don't know if this helps, but if you have a mask on and can still smell the fumes, it's not good enough.
Re: Respiratory selection
Posted: Sat Mar 03, 2012 2:44 pm
by remedy32
Don't know if any of us asked "are you brushing or spraying"? If brushing you are MUCH less exposed to the harmful side of 2 part urethanes since there's no cloud of finely atomized particles. You will be exposed to solvent flashing off but to very little of the more dangerous isocyanates. Wear an organic vapor respirator and follow the comments about bagging it when not in use and disposal of cartridges after 40 ( I like 20 better) hours OR as soon as you smell solvent. It's unfortunate but there is no smell indication for the CA hazard; that's why the timed disposal is important. If you work outdoors the concentrations of vapor goes way down.
If you choose to spray you really do need to protect yourself. I've done spray my work on calm days outdoors; wearing gloves, coverall, hat, goggles, and respirator with fresh cartridges. Normal work time in proximity of the hull is about 15 minutes per coat; so perhaps 45 minutes total. For a while 3M was making recommendations of the organic vapor cartridges for CA exposure as long as cartridges were changed very regularly based on time. Don't know if that is still their part of their system though. If this were something I did daily I would surely insist on a supplied air system.
Stay safe.
bill
CT USA
Re: Respiratory selection
Posted: Sat Mar 03, 2012 3:11 pm
by gstanfield
Bill, I think he said in his build thread that he is spraying or at least that's what I seem to remember
Re: Respiratory selection
Posted: Sat Mar 03, 2012 10:26 pm
by Steven
Brushing. Bought proper cartridge at auto supply store. Thanks for the help.
Re: Respiratory selection
Posted: Sat Mar 03, 2012 11:09 pm
by gstanfield
my bad, I musta got your build confused with someone elses