low cost plywood preserver

ChrisLSD · Sep 22, 2009

i have a project that is going to use some old pieces of exterior rated plywood - no ground contact - will be somewhat protected but outdoors -

without using treated plywood or marine plywood what are a few of the best low cost approaches to making the plywood last -

I have read on here that one can buy some asphalt like stuff in a can for preserving posts at like Menards, Home Depot

or maybe a high tech new paint primer sealer that would be better - what are your ideas?

thanks in advance - i will post pictures as the project begins (maybe this weekend........

Jim in Ma. · Sep 22, 2009

It may not be correct, but I have used old motor oil. Seems to last pretty good.

souNdguy · Sep 22, 2009

as with metal... intact paint..

soundguy

PS.. avoid used motor oil.. it has heavy metals and other contaminates that will leach right out into the environment every time water runs off of it... you want kids drinking that???

stick to a comercial treatment. (thompsons.. etc.. ). paint... including asphalt paints that cure environmentally inert. or dipping product like copper napthenate.

soundguy

Gun guru · Sep 22, 2009

Oh come on now, a little bit of waste motor oil wont hurt you...much.

souNdguy · Sep 22, 2009

that's the waste-water / potable water engineering classes I took coming out...

yep.. hey.. lead and mercury are naturally occuring? and if it's natural.. it has to be good for you.. right

soundguy

showcrop · Sep 22, 2009

I like Thmpsons Water Seal. It makes the water bead up and it penetrates so you know that the water isn't creeping under and doing even worse damage when you think it's dry.

Phil in Pa · Sep 22, 2009

When I was a kid in the seventies, the townships coated the gravel roads with used oil.

While I don't advocate doing that, the drinking water is just fine to this day.

Parts per million.

Gun guru · Sep 22, 2009

My grandfather used to oil the roads in Michigan, 30 years ago. (when it was legal) He made a living doing it.

If anyone even did that now they would just lock you up and you would get a trial someday.

MPK · Sep 22, 2009

They always worry about getting oil in the water wells. I don't understand this. I always thought that oil and water don't mix.

Michael Soldan · Sep 22, 2009

I use Thompson's water seal on every outdoor wood product I have, stairs at the beach, wagon flatracks, decks..I buy a quart of the green presure treat material for sawed ends and mix it with the water seal for decks. A good application of water seal will last a long time. I do my deck every year, I use my garden sprayer to apply it, that works well and saves time.

souNdguy · Sep 22, 2009

we don't draw and quarter or behead people like they did in the dark ages anymore either..

just because we stopped doing something before the ecosystem collapsed is not evidence of anything but that we got lucky.

soundguy

Phil in Pa · Sep 22, 2009

The "ecosystem collapsed".

Are you nuts?

souNdguy · Sep 22, 2009

I'm sure if mankind wanted to.. we have the technology available to us to -destroy- the ecosystem. ( not the planet ).

me nuts? Nuts is thinking it's ok to do something that everyobody knows is a no-no.. and thinking it's ok because we got away with it before.

If you want to be an eco terrorist.. go ahead and move some place far away from my drinking water and oil up everything you want.

slather in some cadmium, benzene andlead, as well as a few other goodies and party hard.

soundguy

Phil in Pa · Sep 22, 2009

Where did I say I wanted to oil up anything?

Right now it's fashionable to scare-monger our kids with false facts about the environment, and I don't stand for it.

IH2444 · Sep 22, 2009

Boiled linseed oil works well and you can paint over it with oil based paint if you desire.

Works better than Thompsons and such.

Bill(Wis) · Sep 22, 2009

You could assign the United States Department of Defense the mission of destroying the ecosystems of the planet and they could not do it. Oh, we might have nice pretty sunsets for a few years but that would be about all.

MarkB_MI · Sep 23, 2009

The difference between marine plywood and exterior grade plywood is the quality of the veneers. Marine ply cannot have any voids. The glues are the same.

When sealing any wood, and particularly plywood, the most important thing is to seal the end grain. That's where the majority of the water comes in, and moisture coming into the end grain brings rot spores with it. Anything that will seal up the end grain will help preserve the wood.

The best material you can use to seal plywood is an epoxy sealer such as WEST system. But epoxy is not cheap. My next choice would be a good enamel paint, with several coats on the end grain. The one thing I would never use is polyurethane varnish: it does not hold up in exterior use, spar varnish is better in this respect.

Why anyone would treat wood with used motor oil is just beyond me. I guess there are folks out there who are even bigger cheapskates than me.

souNdguy · Sep 23, 2009

I'm not into false facts.. water systems engineering is what I studdied in school. There's more than you want to know in your drinking water. parts per million 'thinking' is fine.. however.. look at historacle lead and benzene safety standards what we thought was an acceptable level 'back then' is now known to be harmfull...

2 types of pollution.. point source ones you can point a finger at and control easier, and non point sources.. ones that are harder to track and control. since be definition the NP sources are less controlable.. then we need to focus on controlling the point sources as much as we reasonably can. that means no more waste oil on roads ( besides.. safer dust control oils are comercially available and have been used for years ).. same goes for wood-rot preventatives... plenty of other better options available thn waste oil.

that was my entire point. scare tactics and bad info aren't needed.. there's plenty of good info out there to backup the fact that voulentary polloution is bad.. no need to take a head in the sand stance on it.

soundguy

LAA · Sep 23, 2009

Has it ever occurred to you that the people teaching those classes may have had an agenda? Same agenda as the people promoting the largest and most expensive economy and wealth killing fraud that has ever been perpetuated -- Global warming? The left force feeds their pablum and lunancy to people who cannot or will not think for themselves in order to legitimize their non-science proclamations of gloom and doom.

souNdguy · Sep 23, 2009

I'm not an algore global warming fan. simple water quality test can backup most of what I learned in engineering school dealing with potable water systems.

you guys are to into super fanatic double top sectret government conspiricy issues....

I can't believe any sane person will argure that it's OK to put waste oil in drinking water.....

I'm bowing out of this thread now.

soundguy

Phil in Pa · Sep 23, 2009

You said if he coats plywood with motor oil, kids will be drinking it.

That is preposterous.

And by saying so, I am not in favor of coating plywood with motor oil. abundant tactic.

souNdguy · Sep 23, 2009

wood coated with waste oil can and will leach by precipitation.

you guys are too much into subversive political worrying, and not enough into science for me to continue this discussion with you.

your opinions and you're entitled to em'.

end of discussion for me.

soundguy

Phil in Pa · Sep 23, 2009

Leach by precipitation right into junior's kool aid glass?

That's science?

Thanks for playing.

ChrisB · Sep 23, 2009

Drinking water and oil both come from the ground. Now you tell me that returning the oil back to the ground will kill my kids?

Good thing we do not pave our roads and driveways with an oil based product..... oh wait never mind. Or God forbid coat our basement exterior walls with an oil based product. Or shingle our roofs with an oil based product.

Did you not learn in your fancy drinking water class that the Arabs will tap old dried up oil wells for drinking water that fills the empty oil caverns? I do not see them dying as you described.

low cost plywood preserver

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