What you'll need
- Tung Oil or Linseed Oil
- Beeswax
- Citrus Solvent
- Stirrer
- Container
- Brush
- Spray Bottle
- Cloth
Step 1 – Choosing the Best Sealer
Limestone sealer can be made with linseed oil, Tung oil or beeswax. Linseed oil mix is a good sealer but is recommended only if darkening and discoloration is not an issue. Tung oil mix dries completely and does not cause any discoloration after its application. The last option is beeswax. This product does not need any special mixing procedure and can be used as is.
Step 2 – Mixing the Ingredients
For linseed oil or Tung oil mix, simply mix one part of either product with one part of citrus solvent in a container. Sometimes, mineral spirits can be used as an alternative but only when there are no citrus solvent products available. The mix requires the same proportion of solvent.
Step 3 – Applying the Limestone Sealer
Remember that limestone is a very porous stone so make sure to work on the application as quickly as possible. Never leave a thick coating of the mix on the surface of the stone for a long time because it will be absorbed easily and cause uneven darkening. Dip a cloth in the mix and apply it thinly on the surfaces of the limestone. If not, use a paintbrush or a spray bottle to apply the sealer.
When using linseed, it is very important to spread only a thin layer of the mixture on every coating. Never spread a thick coating because linseed takes longer to dry than Tung oil. Allow the first coating to dry for about 24 hours before applying another coat. At least two or three thin coats of linseed oil mix are ideal.
For Tung oil mix, all coatings except the last should be spread thinly. After applying one or two thin coats of Tung oil mix, apply a thick coat for finishing. While the thin coats may take at least 8 hours to dry, the last thick coat may take about 2 to 4 days before it dries completely.
The beeswax is very easy to apply but it may require constant application. To apply the beeswax, simply place a decent amount on a cloth, spread it on the stone and buff immediately. Be careful not to apply too much wax though.
