A quick drying anticorrosive
primer for use under chlorinated rubber Thickcoating or Finish. It
is suitable for use over a variety of metallic surfaces, both ferrous
and non- ferrous, and is recommended - over Etch primer - at the first
coat of C.R. systems on galvanised steelwork. It can also be used
as a sealer coat for zinc or aluminium metal sprayed components. On
steelwork, it is most effective with blasting-cleaning, or very thorough
hand cleaning using mechanical tools, as the method of surface preparation.
PHYSICAL CHARACTERISTICS OF WET PAINT
(TYPICAL FIGURES)
Pigment
composition
Titanium
dioxide, zinc chromate, mineral Extenders
Pigment %
22 ± 2
Binder type
Modified chlorinated rubber
Binder %
27 ± 2
Thinner composition
Aromatic hydrocarbons
Thinner %
51 ± 2
Volume solids
%
30 ± 2
Specific
gravity of paint
1.18 ± 0.02
PHYSICAL CHARACTERISTICS
OF DRY FILM :
Drying
time of Standard thickness
at 30ºC
½ hour
at 20ºC
½ hour
At 7ºC
1 hour
Recoating
times(minimum)
8 hours
by spray, 24 hours by brush
Standard
thickness required
Wet paint
83-133 microns (3½ - 5½
Mils)
Dry Film
25-40 microns (1 - 1½
Mils )
Theoretical
coverage on smooth 7.55 - 12.1 m2/1 Surface
Chlorinated rubber coating have poor resistance
to oil land solvents. Heat resistance is Poor. Do not apply to surfaces
which exceed 65ºC. Not suitable for self weathering.
APPLICATION
Brush / Roller
Ready for use. Apply an even coat direct
from the container. Do not work the brush too much over the same area.
It is not good painting practice to apply primer by roller because
of poor control over film thickness. If it is essential to use rollers,
ensure that the primer is applied evenly and not overspread.
CONVENTIONAL SPRAY
Thinner
addition by volume
Upto 25%
Recommended Thinner
Chlorinated rubber
Thinner
SURFACE PREPARATION
1. Blast clean steelwork to BS4232: 1967 'Second Quality'
(Swedish Standard SA 2½ ) or U .S. Steel Structures Painting
Council SSPC SP 10 Primer immediately after Blasting. If this is impractical
both blasting and priming must be completed within the same working
day and before the standard of blasting has deteriorated. Priming
should be followed the next day by the first coat of thick coating.
If this is impossible, 2 coats of primer should be used.
2. If blasting is impractical , chip, scrape and wirebrush mechanically
of manually to remove loose millscale and rust before priming. This
preparation method will give a lower standard of performance.
3. Galvanised Steel Fabricator's pretreatment must be removed with
solvent washing and abrasion, followed by etching primer two pack.
PAINT SYSTEM
Coat Chlorinated Rubber Metal Primer followed by Chlorinated
Rubber Thick Coating and Finish to the recommended dry-film thickness.
