Wood filler or PaperMache over OSB

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It seems a lot of effort for prototyping. If there was good reason to experiment or use OSB, then fair enough.... But with the abundance of ply and MDF, it seems like making work to try OSB.

If you have to use OSB, try rebating all joints into the side panels and end panels. Doesn't have to be deep, just enough to level the surface to provide a straight glue joint.

J.
 
Have you built an actual cabinet with OSB? It's not the most conducive to any type of joinery that you'd want to incorporate - and its edge grain screw holding capacity is terrible.

I think that standard particle board would be a better bet.
 
Is that Gorilla Glue?

Indeed it is. Just one of several brands of polyurethane glue. Excellent for gluing different materials together and a little water in the joint actually improves the bond. There are a couple of caveats: The foaming action as it cures can actually push a joint apart if sufficient clamping force is not used. It has a somewhat limited shelf life, about a year from manufacture whether it's been opened or not. It is generally recommended that you purchase only as much as you might use within that period. Bulk buying could leave you with glue that no longer works.
 
At least one advantage of this type of adhesive is its gap filling ability - which would certainly be hand with OSB, but I'll repeat my suggestion that standard particle board would be much easier to work with, and likely yield a more structurally sound enclosure.
 
OSB is miserable to build with. I would just buy some decent ply. The time saved and the final results will be well worth the small cost for better wood.

I'm also not a fan of particle board and MDF for similar reasons, but would call MDF tolerable. Particle board not so much.

Plywood with a good number of plies is what I always prefer. Doesn't even have to be BB.

My opinion.
OSB < Particle Board < MDF < Sanded Ply/Home Depot Whatever's-in-stock Plywood < Poplar Plywood < BB
 
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