While it s best to fill any voids prior to attaching pieces of plywood together you can fill voids between plywood sheets with wood filler.
Plywood floor gap filler.
Wallpaper as floor paper.
If you have wide gaps in a wide plank wood floor using natural rope as a filler is a relatively easy and inexpensive option.
For this stunning diy finish fill and smooth gaps in the plywood subfloor with fast setting drywall compound and a trowel.
My shop has 3 4 pt plywood for floor.
Lacquer based wood floor filler is a mixture of lacquer and very fine wood dust.
This filler is fast drying gives off a lot of strong fumes and is flammable.
For that reason any subfloor filler you use does not have to be particularly elastic.
Step 1 sand the surface of the plywood with 80 grit sandpaper.
Inject the filler into the gap and fill the void until the filler is flush with the surface of the wood.
The next layer of filler to go down before the vinyl flooring is 1 4 inch birch plywood.
Natural latex wood filler dap plastic wood all purpose wood filler dap plastic wood all purpose wood filler is a high quality latex based wood filler that looks and acts like real wood.
Subfloor materials including plywood oriented strand board and to a lesser degree particleboard are fairly stable and any gaps that might develop between sheets are unlikely to widen.
For whatever reason the contractor left gaps between each piece 1 8 to 1 4 wide.
Probably because this part of the house is in the 100 yr floor plain.
If the gaps in your wood floor are smaller and more cosmetic a prefabricated wood filler or a wood dust and wood flour cement mix would be good options.
Anyhow there are 8 joints about 20 long that i want to fill in.
Wood filler can be used to fill gaps up to an inch wide and an inch deep.
It can be used to repair cracks gouges holes and other surface defects on furniture woodwork molding cabinets paneling plywood windows doors and painted surfaces.
However many woodworkers carve a plug or wedge from a solid piece of wood slightly smaller than the divot they are attempting to repair glue the plug or wedge in place and then use wood filler to fill the remaining void.