I had a gallon can of the Zinsser Sanding Sealer shellac sitting on the
concrete garage floor for several months. As I was walking by today, I
noticed a goo around the can and it turned out to be shellac oozing out of
After transfering the contents to another can, it was easy to see the hole
in the bottom of the can. It was a small hole about an inch in from the
rim. In the area where the product was leaking, there was an approximately
3/4"x1/2" depression in the concrete. I'm thinking some chemical was
spilled there (it's near a sink, so who knows? It's also near the garbage
cans where bags of pool shock are disposed of.) and the can failed.
Just to be sure, has anyone else seen a can fail in this manner? We've had
100F heat with 20% humidity for the last month.
I've cleaned up the affected area on the floor as best I can. Any problems
with just leaving what didn't wipe up on the concrete?
Sure, although a few months is a little short. It's possible there was
a material flaw in the can and the floor had little if anything to do
with it. OTOH, there could have been something outgassing from a spill
that exacerbated the problem, too. Who knows??? "Stuff happens..."
W/ shellac, I don't see any problem if you don't. :) It might indeed
be _a_good_thing_ (tm) to cover up whatever it was that spilled
(presuming something did)...
The area around the leak was rusted, it was about 1/8-3/16" in diameter.
Everything else on the bottom of the can is intact and still shiny.
Since it was so localized, I'm wondering if it might be a combination of a
flaw in the metal (to allow the reaction to start) and an external chemical
reaction (that did the bulk of the work).
On 22 Jul 2012 14:19:04 GMT, Puckdropper <puckdropper(at)yahoo(dot)com> wrote:
I've had that happen, though it took longer than a few months and I caught it
(purely by accident - we were moving) before more than a drop or two leaked.
Concrete is moisture permeable. The can bottom will trap moisture against it
and start corroding the steel.
The space under the can undoubtedly had much higher humidity.
Other than the mess, I don't see how it would affect anything. You're leaving
it on your furniture.
I once had a can of beer, or 2 or 3, can't recall, that FAILED to induce enough machoism, in me, for me to properly/adequately hold an open quart can of Sealcoat, as I walked across the shop, resulting in the Sealcoat having slipped from my grasp onto and all over the immediate shop floor. Some "cans" can, indeed, fail.
100 degree temps with 20% humidity sound comfortable, compared to 100 degree temps with 85% and/or above humidity.
In years past metal cans were used with everything so to speak. As more
water based products have been introduced the cans began to rust
internally hence you now see a lot of the plastic cans with metal tops.
I know you said shellac but if it is water clean up, it has water in the
Yes and no.
If there is any hint of salts going down the side of a battery it will
kill the battery.
Also the problem with concrete and batteries is usually cold winter
floors.. Batteries don't like the cold in general, but usually revive if
you keep them charged. On the other hand if the battery runs down you
get dendrites which can short a battery... Soooo it is a wives tale,
but partially true, just for the wrong reason.
do it in Florida, and it's not likekly to hurt the battery.
In Wisconsin, it can...
It will, then, in a car, too. The battery is typically sitting in a metal
It's not the temperature but the delta temperature from top to bottom. ..or
so the theory goes. It's really not good to leave lead-acid batteries off
charge for long periods. They'd rather be constantly "float" charged.
It's not the cold that kills batteries, rather heat. You just don't need the
capacity until it gets cold. My car batteries lasted eight years in the North
- never failed to start the cars. The first summer in the South killed 'em
We're not talking 1 night. We're talking unused for a period of time.
I agree a fully charged battery won't have the problem, but batteries
lose s percent of their charge daily depending on the battery type the
percent can be small... Lithium, to 10% Nicad... The lead acid batteries
depending on the quality vary quite a lot...
You leave your vehichle out for a month and let see what happens.
A properly sized battery in good condition is OK. I've had problems
with older batteries in the cold. Many years ago I had a '64 Karmen
Ghia that we converted to 12 volt. (Used a Chevy alternator with a
counter bored shaft to go on the generator shaft) Battery was
marginal so I took it in the house every night until I got a new one.
Then I will have to say that you have learned wrong. Storing wet cell
batteries directly on a concrete floor is perfectly fine.
The old practice and thinking which really makes no sense since the
invention of plastic "WAS" to keep wet cell batteries off of concrete
floors. That was when battery cases were made out of "wood".
Since the use of plastic cases for these type batteries have been used
there is no long an issue of a battery running down from being placed on
a concrete floor.
For about 25 years I stored thousands of car batteries on concrete with
no problem at all.
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