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Filling holes in wood with wooden plugs

Posted by Adrian
April 22nd, 2020

wooden plug cutter

Filling holes in wood with wooden plugs

When it comes to filling holes in wood, plaster etc it is typically done with a powder filler or a two part filler, as discussed in this blog post about fillers, the different types and their uses.

But what do you do if you want to fill screw holes in wood and then varnish the wood in clear varnish or leave it natural, you could use a natural coloured filler or you could use wooden plugs or pellets. This may occur, for example if you have a hardwood window sill, such as oak or mahogany and you want to use a clear varnish on it, then you don’t want to see the filler, this is where these wooden plugs come in.

What are wooden plugs

Wooden plugs are used to conceal and hide screw holes in wood without the use of a wood filler. They are made from the same wood as surrounding wood so that the grain and wood colouring match in when finished. You can make your own wooden plugs by buying a wooden plug cutter, these are available from any good hardware or timber store. They come in different sizes to match the size hole you wish to fill.

When you drill the plug you will notice the edges are slightly tapered, this is to allow for a good fit.

Using wooden plugs

Firstly you will require a piece of wood, such as an off cut of the timber you wish to fill the screw hole in. You will also need the plug cutter.
Lay the off cut on a flat surface, drill into the off cut with the plug cutter, this will produce a plug for you. Once you have the plugs you require you can fix them into place.
Take some wood glue and put a little around the plug and a little in the screw hole. Next place the plug into the hole making sure the grain of the plug runs the same way as the surrounding wood, give the top of the plug a little tap with a hammer to ensure a good tight and secure fit. Wipe any excess glue that may ooze out with a damp cloth, allow the glue to fully dry.
When the glue has fully dried you can finish the plug off, to do this you need to carefully remove the top of the plug with a sharp chisel, leave the plug just proud of the surrounding timber. The remaining plug can then be sanded down level with the surrounding area.

Once you are happy with the plug you can apply the finishing coat over the wood and the screw hole will almost be invisible.

Wood plugs

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