Sealing / caulking between OSB panels

[scoob8000]

I'm in the process of putting up the OSB on my ceiling, but I'm having some small gaps here and there because things are not perfectly square.

What product or type of caulk would work best here? I like the silicone stuff, but it's a little runny so I'm not sure how well it'd work on a ceiling.

 

[dfiler2]

I would use a paintable caulk if you intend to paint the ceiling, it will stand up well inside and it is a little thicker.

 

[NUTTSGT]

I used some regular old DAP painters caulk.

 

[Modern Jess]

I really like a product called "Custom Patch". Comes in a yellow and white tube. It's an elastomeric caulk that sticks well and will expand and contract as necessary so as not to crack. Easy to apply, and a bit of painters tape on the nozzle keeps the tube fresh (unlike silicone).

I get it at HD, but it's grouped with spackling and patching supplies, not the usual caulks and sealants.

 

[Falcon67]

I used regular brown window caulk. I didn't paint, looks fine to me.

 

[32ports]

I like to use battan strips of wood. It's the strips used to form lattice panels. If you have a finish nailer it's a very fast process and not very expensive.

 

[ADSR]

Dap 230

 

[tlmartin84]

I like Alex plus, a little more flex than painters caulk, wipes down easy and smooth with a wet rag, and has more flexibility than pure painters caulk.

I have literally ran miles of that stuff..............

It takes paint easier than the 230 and 100 percent silicones, do to the fact it has just enough silicone to help it flow.

 

[Beemer533]

I used some liquid nails sub floor adhesive I had on hand.. Worked really well and being tan, it doesn't stand out much.

So far it also seems to take latex paint fine in the couple of areas I have tested on it...

 

[scoob8000]

Good replies. Lots of the same lines I was thinking of.

I used some painters caulk on some crown moulding in the kitchen a few years ago, and now it's cracking in places. Unless it was just old or a bad batch.

I pre-painted the wood before I hung it, so it's not a huge issue to repaint. Probably go with white just to match.

Beemer, funny you mention liquid nails. My co-worker and I were discussing that yesterday.

Modern Jess, I'll have to check that out. What's it's typical application?

The Batton strips are not a bad idea either once I get all my lights hung up.

Lots of good ideas, thanks!

 

[Modern Jess]

Modern Jess, I'll have to check that out. What's it's typical application?

From the back label:

DAP Phenopatch Custom Flexible Patch is a high performance, elastomeric pro-grade patching, sealing, and bridging compound. It expands and contracts with surface movement to prevent cracks from reappearing. Ready to use. Repairs cracks and holes in wood, drywall, plaster, stucco, brick, concrete, and masonry.

It's basically for stubborn cracks in drywall (and other surfaces) that change seasonally. It comes in regular caulk tubes, though, so applying it really isn't any different from regular painters caulk, except for the stretchy part. I use it everywhere, and it hasn't failed yet. In contrast, my kitchen upper cabinets (where the cabinets meet the ceiling) were done with regular painters caulk, and they cracked the first season change after we moved in.

 

[NUTTSGT]

I like Alex plus, a little more flex than painters caulk, wipes down easy and smooth with a wet rag, and has more flexibility than pure painters caulk.

I have literally ran miles of that stuff..............

It takes paint easier than the 230 and 100 percent silicones, do to the fact it has just enough silicone to help it flow.

I believe that is what I used a majority of the time.

 

[Tim The Tool Man]

The best I have found for filling gaps in OSB is OSI brand drywall adhesive. It is color matched and believe it or not it really works. I used it in an unheated shed I finished for a guy about 3 years ago, no cracking yet.

 

[Ainsley]

I caulked the seams in the OSB in my garage with siliconized acrylic caulking, similar to Alex plus.
I primed with an oil based wood primer, caulked and then did two top coats with a SW high performance acrylic in gloss.

 

[38Chevy454]

I used a siliconized acrylic caulk, may have even been the Alex Plus, I don't remember exactly. It is paintable, and has a bit of flexibility. Sealed all around the panels and also around the electric boxes. Two coats of Kilz and called it done.

 

[stikman56]

I like Alex plus, a little more flex than painters caulk, wipes down easy and smooth with a wet rag, and has more flexibility than pure painters caulk.

I have literally ran miles of that stuff..............

It takes paint easier than the 230 and 100 percent silicones, do to the fact it has just enough silicone to help it flow.

Alex plus clear. Best stuff I've ever used. Only thing I will use now is that.

 

[tlmartin84]

Beware of the "ADHESIVES" (SUBFLOOR, DRYWALL, OSI/LIQUID NAILS. They are good but if you need to pull a panel good luck......there will be nothing left of it.