It s better for us to get all done at a time to ensure the top surfaces in a board aligned.
Gluing 2 sheets of plywood together.
First gather up some heavy objects say cinder blocks or books or tools anything handy.
Also each opposite laminate is of equal thickness to the other.
Get as many cinderblocks as you need to apply the recommended pressure.
Let the glue joint set for about 20 to 30 minutes then release the clamps and add another board.
How to glue plywood together.
If you want to bond them together to make a single sheet of 8ftx2ft x 1 1 5 inch thick plywood you need to do this.
Here again assuming full sheets of plywood as smaller could be clamped in a device.
Perfect to be used as a workben.
In your case a half inch center with quarter inch glued to both faces might be safer than gluing 3 4 together with 1 4.
Wet both sides with a water soaked rag then spread the glue all over.
Inspect both sides of the plywood and choose the sides you like best.
Assuming there is a back side or a side unseen and damage will not be a problem.
Here s a tip that solves the problem.
Lay one piece of plywood on a flat surface the floor would be best.
After job is done remove the screws leaving the two pieces laminated.
Showing you how i go about laminating glueing 2 plywood sheets together to make a very sturdy and thicker sheet of plywood.
It may take a lot but they are cheap and reusable.
Face the good sides.
When you re gluing several boards together it can be difficult to get all the top surfaces perfectly aligned.
I ve glued plywood together with regular wood glue many times and it s not an issue.
Rather than glue and clamp all the boards at once add one board at a time.
It sounds like you re planning to stack two sheets together.
This will give you tons of contact with long grain to create a really strong glue joint.
One could use screws to pull the pieces together and hold till the glue cures.
Finish each board for about 20 to 30 minutes before moving into the next board.
Gluing several sheets of plywood together is to make it thicker.
Spread the glue into an even layer with a small flat stick.
Lay two pieces of plywood out on two sawhorses.
Plywood for instance is always glued up of an odd number of laminates for balance.
We recently glued together two 4x8 sheets of ply and then tried to pry them apart.
Squirt glue all over one of the pieces of plywood.