How visible is this when the shelf is assembled? I suspect that the only
thing you can do at this point is make it worse. You could try injecting
some glue in between the separated layers and clamping them together to dry.
I'm not optimistic about the chances of a repair I would call satisfactory.
Looking at the photo, I would cut a spline the width of the slot, wrap it in
wax paper. Glue the damaged
area with tite bond glue then insert the spline in the slot and clamp till
dry. Remove the spline .
The particle board, melamine, should glue back ok from the picture of the
If the surface is damaged, repair with a wax stick of the appropriate color,
or if you can, turn shelf
over and use other side for the top, if they are identical.
Don't buy mdf furniture? I hate the stuff. I would inject some wood
glue into the cracks, then clamp it flat so that it compresses back to
it's original shape. It might help to make some wood strips that
exactly fit the grooves to provide support. Wrap them in clear packing
tape so they don't glue themselves to the shelf.
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