How to repair all kinds of cavities and cracks in wood

It is common in any space that is used daily, such as rooms in the home or places where many people work, that some things wear out or break with use.

But repairs are often not calculated in our budget and become a headache. Although also, many times we make more trouble than it deserves and spend money on specific and expensive products that are not necessary.

In this note you will be able to learn how to make a sawdust paste or sawdust mass, a very malleable material and with which excellent finishes can be achieved, ideal for filling cracks or cavities in the wood of floors or furniture; to fill openings through which the wind enters doors or shutters; And why not, to use in do-it-yourself projects such as a table decorated with mosaics or a homemade parquet floor made with pallets.

One of the advantages of sawdust paste (or sawdust paste) is that you can dye it any color you want with watercolors or any water-based paint or ink, and that way it will serve you regardless of the color of the surface on which it is placed. applique.


  • Sawdust (sawdust) fine
  • Powdered casein glue*
  • Watercolors of the necessary color

*Casein glue is a strong glue that can be made at home, with milk, vinegar and baking soda, or bought prepared. You can also use another glue, such as carpenter’s glue, but you have to get it in powder, so that it mixes well with the sawdust. If you are going to do very little and you have very fine sawdust, it can be vinyl glue.

If you want the paste to be colored, you must first dye the sawdust, preparing a solution of watercolor very well diluted in water and spraying it with it. Let it dry.

Then, mix the sawdust with the casein powder very well, in a proportion of one part of casein every six of sawdust. Gradually add cold water until you get the texture of soft clay.

This mixture is very malleable and you can give it the use you want. In crafts it is used to inlay wood and also to give smooth and beautiful finishes. It can be sanded later.

To fill a cavity or crack with it, place a little of the paste on the surface to be filled, and then level with a spatula, so that the substance enters the crack and then remove the excess. You can clean the surroundings with a damp cloth.

Then let the mixture dry, and finally, sand it to make it perfect. The resulting material will be similar to chipboard, and the finer the sawdust, the more neat it will be.