Print document
 18 of 47 
 
E
041
EFFLORESCENCE
(Surfaces affected by)
Efflorescence is white crystalline substances or white fluppy deposit or
discoloration that appears on plaster, brickwork, concrete or cement renderings.
During construction of building, sand or bricks may contain some soluble salts,
which ultimately dissolves by water in the wall and comes up & deposits on the
surface during drying process in winter. This deposit destroys paint work and
heavy deposit destroys even plaster or brickwork. Therefore, it is better to be
careful in selection of sand, brick & water during construction.
Surface Preparation: 
If efflorescence is observed the surface has to be rectified before painting work.
Scrap off all the white deposits as far as practicable. Apply 5 – 10% solution of
Muriatic acid. Allow to react for 10 – 15 minutes. Then wash off excess (if any)
acid by clean water. Allow the surface to dry completely, Apply 2 coats of Damp
Stop. If lightly affected, after treatment, a coat of Plastron Sealer can serve the
purpose. For heavy deposit, after the treatment re-plastering may be needed.
After curing & proper drying apply a coat of Plastron Sealer followed by finish
coats.
Interior Painting:
1 coat Plastron Sealer, 2 coats R. APE/ Luxury Silk
or
1 coat Tartaruga.
Exterior Painting: 
1 coat Plastron Sealer, 2 coats Weather coat
or
1 coat Tartaruga
042
EPOXY RESIN COATINGS
(Surfaces previously painted with)
Epoxy coatings are extremely hard, tough coatings with good chemical
resistance. They are very resistant to abrasion and so if recoating is to be done
then special attention is to be given for abrading the surface to provide sufficient
‘key’ for adhesion. The surfaces should be rubbed down wet on wet or dry
abrasive paper. Dry and dust off the surface. Apply Epoxy Coatings as usual.
043
EXPANDED METAL
These are made of steel or Aluminium and used extensively for window guards
& fencing.
Surface Preparation:
(See ‘Aluminium’ or ‘Steel’)