POLYCOAT

This is a synthetic elastomeric polymerized waterproofing coating material for concrete/plaster/metal/wood surfaces, exposed stone surfaces, asbestos cement sheet, etc. This is available as a single component liquid which can be made to any colour using pigment.


Uses

POLYCOAT is primarily meant for waterproofing external walls. However its formulation makes it suitable for other applications as well, such as

  • Chemical plants and Machinery.

  • Interior and exterior decorative applications free of fungus development as invariably likely in other (cement-based) coatings.

  • Wooden flush doors and windows.

  • Water tanks: overhead and underground.

  • Coating of concrete/MS pipelines carrying potable water, raw water or effluents.

  • Waterproofing of synthetic wood, like ‘Nuwood’ etc.


In general the surfaces can be listed as below:

Concrete, plaster, stone, masonry steel, cast iron, mild steel water pipelines, wood, brick structures, general chemical plants, concrete structures subjected to chemical attack or bacterial or other contaminations, water tanks, jetties, sewage plants or other installations permanently under water may be effectively coated with suitable grade of POLYCOAT


Properties

POLYCOAT basically gives protection from water leakages or any damp spots (I.S. 3085/1965).

  • It can be offered in any colour shade so that the exteriors can be waterproofed and decorated simultaneously thus eliminating the expenditure on additional painting.

  • Unlike cement based exterior coatings, POLYCOAT does not attract fungus, moss, etc. during the monsoons. The exteriors look freshly painted for years.

  • When suitably pigmented (viz. Offwhite or ivories, grey, terracotta) it is not affected by ultraviolet rays of sun.

  • It protects structures from salt penetration in marine environments.

  • It can be suitably modified to become a fire resistant / retardant coating.

  • It is unaffected by a wide spectrum of chemicals including some dilute and concentrated acids and alkalis.

  • It protects underground structures from attack by ground water sulphates and chlorides when applied on external concrete surfaces.

  • When suitably modified it inhibits bacterial growth thus making it suitable for hospital interiors.

  • It has a fairly good resistance to abrasion due to normal wear and tear.



Colour

The use of Ivory, white, grey, terracotta are best suited for exteriors. Available in slightly glossy or Matt finish.


Instruction for use

  • Clean the surface to remove dirt, loose particles, flaking paint, etc. and rub down to a original hard surface. In the case of steel surfaces all scales, rust and grease should be removed. The life and performance is directly dependent on the extent and quality of cleaning.

  • Open the container and stir well for 15 minutes to attain even consistency. POLYCOAT is supplied in ready mixed form. However in case it has thickened due to long storage, use specified thinner (upto 5% maximum).

  • Apply the coating by brush or spray.

  • Depending on the requirement apply two or three coats with a minimum interval of 24 hours between successive coats.



Drying time

Touch dry :
In 30 minutes at ambient temperature.
Tack free dry :
In 3 hours at ambient temperature.
Hard dry :
In 24 hours at ambient temperature.
Cure time :
3 Days.


Film Properties

a.
Sword hardness after one week
50
b.
Elongation
20%
c.
Impact
Passes 25 Lb. tests.
d.
Abrasion index
10 – 13
                           

Coverage

Average 50 to 60 sq.ft. per litre per coat. Actual coverage depends on the mature of the surface.


Curing

Self curing coating. It cures progressively over 3 days, attaining its full strength after seven days.


Packing

20 ltr tin & 4 ltr tin.


Shelf Life

Up to twelve months when stored in tightly sealed containers. However, periodic bi-monthly stirring is advisable. Store in a cool and dry place away from fire. One pack system, so no problem of pot life.


Testing Standards

a.
Waterproofing
Passes I.S. 3085/1965
b.
U. V. resistance
Passes ASTM D-322
c.
High Temperature stability
Passes ASTM D-794
d.
Abrasion
Passes ASTM D-968/57
e.
Salt spray test
I.S. 2074/1962
f.
Acid / Alkali resistance


Unaffected over a period of 30 days by Sulphuric acid pH 1 and Sodium carbonate solution pH 13.5


Performance


The application of POLYCOAT when carried out according to the specified instruction provides a waterproof surface, which would last up to several years depending on the number of coats applied. Three coats are recommended. Another fresh coat or even mere touching up occasionally at a few vulnerable spots should be sufficient to extend the life of the coating.