Does concrete floor need protection in a DH kiln?

[blackhawk]

I am building my DH kiln currently.  I poured a monolithic 4" thick insulated concrete pad with plastic installed beneath the slab.  I was just wondering if the moisture pulled out of the lumber would eat away at my concrete floor inside the kiln over time?  If so, what is the best sealer or epoxy coating to use to protect it?

Thanks

[boonesyard]

No, heat and moisture evac will not deteriorate your concrete. What is more likely to affect the concrete are the tannins that some woods produce (cedar, oak, walnut, cherry) that will stain the concrete. Tannin staining will penetrate the pores in the concrete and is very difficult to remove unless it is sealed. Concrete is easily sealed using a pump sprayer. There are many products that work well such as Tenon Cure and Seal and BASF Kure-N-Seal, just a couple examples.

[K-Guy]

Tannic acid from the lumber will slowly degrade it over time. It will show as a white powder on the floor and take years to show real damage.

[YellowHammer]

I have tried lots of things, epoxy coatings, garage floor paint, etc.  After a few years they just degrade or chip off.  The only thing that I have used that really works for years is the aluminized mobile home roofing paint.  I mix that sliver mess up, pour it on the floor, swish it around with a mop, and it finds any floor to wall leaks, low spots, etc and seals them up.  After a few kiln cycles it cures decently hard.  It's a mess but it's easy to apply and it works.  I have pavers on top of my concrete floor that the runners of the pallets sit on when I load with lumber, so nothing really ever touches the concrete.  While it's curing, I just step on the pavers so I don't get the goop on my shoes.

[K-Guy]

While it's curing, I just step on the pavers so I don't get the goop on my shoes.

Always looking for the easy way!!! 

[YellowHammer]

Yep, I'll let others do it the hard way...

[blackhawk]

Yellowhammer - Do you use something like this Kool Seal product: aluminum paint

[YellowHammer]

Yep, that's the goop.  I glop the stuff on the interior walls, also.  Mix it up, pour it out, slop it around and make sure everything is covered.  Put it on pretty thick, but not too thick or it will takes a long time to cure.  That being said, the more it flows on the floor, the more it will find any cracks and crevices, so I just kind to pour it on the floor and swish it around.  The liquid part will soak into the concrete and seal it forever, the aluminized fiber will settle on top of the concrete and provide a solid protective layer.  It's ugly, it messy, it's nasty and it's permanent.  It works great!

Don't step in it for a few weeks or you'll ruin your shoes.   

[jimbarry]

I just step on the pavers so I don't get the goop on my shoes.

Practicing what he preaches. Literally taking steps (on pavers) to save steps (cleaning boots).