Do we have to seal our plywood boards?
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yoi can seal it with a clear sealant that keeps the color but it definitely needs to be sealed or it won't stay that color
Sealing the wood will help in retaining the color-- although wood is going to change color over time-- and it will seal the wood so that the topcoat doesn't look blotchy or dull. You could seal it with a clear sealer and then topcoat it with a clear finish to protect the walls from dirt. Waterbased sealer and topcoat will be easier to apply and you can get a sealer that doesn't raise the grain too much so you can avoid sanding.
Yes I lived in a non sealed house and doing later was a pain but now it looks great mine is a log cabin so lots of medium dark wood. Do samples of the finish also and put them on the wall with waste wood to see what you like. Good luck.
My recommendation (and I am a wood refinisher), seal it with polycrylic (water-based) in a matte. Minwax makes a great product in a blue can that I love.
You should to keep them from dirting up.
If you seal them, they will be a lot easier to clean and won't snag things that might rub across them
since they are plywood and laminated (i.e. layers) any moisture what so ever can cause warping.. so yes.. definitely seal them. it also helps keeping them clean
Yes, I would seal or paint. Not sure what you are referring to with the chalk question, can you elaborat?
Nope they were stained but never sealed, grease loves my cabinets and very hard to keep nice. I have tried all kinds of cleaners but nothing works. I'll keep searching for a wood degreaser.
Definitely seal it.
@ Karen, have you tried Krud Kutter, they make a regular cleaner and a kitchen degreasing formula. I have used these for many years, and its a good product. I use TSP before I paint, on surfaces but you should probably test an area first, for cleaning with TSP. You should consider sealing these, with a water base poly acrylic, non yellowing formula. :)
In any warm and humid enironment there is the growth of mildew & mold. Sealing is a must. I would put a coat of sealer to the back side of the plywood as well. I panelled a wall with that same type of panelling and did not seal it. After a couple of years, I had to tear it down. I lived in Los Angeles at the time. You can use a matte finish so that it will still look like the raw wood. Good luck!
I learned from a friend years ago to use Thompsons deck seal inside - they even have stain
You can condition it or use other wood product if you like the raw look and don't want the sealer to distract from the wood. You can also oil it like butcher block. I had unsealed wood on walls before and I live in south Louisiana. Most humid in the US. You can care for it the same way you do any unsealed wood furniture. If you decide later then just clean and prep with enough sanding to accept coating. Clear stain would also keep color and comes in flat/matte