Generally earthen plasters are applied by hand.
However, hawks and trowels are also used.
Despite severe wind driven rain, the finish plaster shows almost no erosion.
Bandin Sikkhathai Sand-Clay-Glue Finish
Mix 0.5kg of tapioca starch with 5 liters of water.
Boil an additional 5 liters of water.
Pour the tapioca starch mix into the boiling water.
Stir until clear, approximately 5 minutes.
Notice the difference in color between the two photos above.
Sift sand through a 1mm screen.
Thoroughly mix clay with water into a clay slurry.
Squeeze the clay slurry through a 1mm screen.
Mix two parts (20 liters) sand with one part (10 liters) clay slurry.
Add tapioca starch glue to sand-clay mix.
Add 2 tablespoons of vegetable oil.
Apply in three coats.
After the first coat, immediately apply the second coat (追い掛ける)
Allow to thoroughly dry, and then apply the third coat. Smooth with sponge.
Finish Plaster on Exposed Walls