Product reference: 3/34

Product title: Corrofill

Valid from: 30th December 1999

Last reviewed: May 2019


A two-pack organic peroxide catalysed bisphenol ‘A’ polyester filler or grout.

Suggested use

As a filler for badly pitted steel in applications which require a
high performance, chemically resistant coating system.


Not suitable for immersion in some highly polar solvents,
de-mineralized water or extremes of pH values. 194°F
(90°C) immersed 248°F (120°C) atmospheric.

Health & safety

Before handling or using this product, the material safety data
sheets relating to 200 series product and organic peroxides
should be read and all precautions observed.

Surface preparation

The surface to be coated should be free from grease etc.
Metal should be grit blasted to a minimum SSPC-SP10
(ISO 8501-1 Sa 2½) or equivalent with a grit profile of at
least 2 mils (50 microns), 4-5 mils (100-125 microns) being
the ideal key.All blast residues should be removed by
sweeping clean, blowing and vacuuming where necessary.
Coating of the substrate should take place as soon as
possible. For full surface preparation details
see relevant surface preparation specification sheets. This
product should preferably be applied over Polyglass PPA
primer or the first coat of other Corroglass/ Polyglass series
materials. It may, however, be used on its own but surfaces
should be blast cleaned to SSPC-SP10 (ISO 8505-1 Sa
2½) in accordance with Corrocoat data sheet SP1.

Application equipment

Short hair stiff brush, trowel or scraper blade.


Using application tool, the catalyzed material should be
vigorously worked into the surface profile, ensuring that
the maximum possible wet out of the surface area is
achieved. Following this procedure, the coating thickness
can be built up to the required thickness. The material
may be applied at DFT’s of up to 8mm but this thickness
generally should not be exceeded in a single layer.
Material may be applied up to 20mm when used as a
grouting compound at and below 68°F (20°C).


USED. The addition of Styrene may adversely affect the
performance of this product do not add without consulting
Corrocoat USA.


1 Gallon and 5 Gallon.

Storage life

12 Months maximum, when stored at temperatures below
68°F (20°C) and away from radiating heat sources or direct



Theoretical spreading rate

43 sf per gal (1.25 kg/m²) @ 1mm DFT.

Cure time

In ventilated conditions at 68°F (20°C), 90% cure will be
attained in 8 hours. Full cure for chemical resistance will
require 6 days 68°F (20°C). Cure times will be shortened,
and the degree of final cure improved by post curing at
elevated temperatures.

Mixing ratio

Corrofill can be catalysed within the ratios of 100:1 PBW
base to catalyst to 100:2 PBW base to catalyst. The ratio
should always be within these limits, 2% addition of catalyst
being the norm, 1% being used at ambient temperatures
above 82°F (28°C) or film thickness above 5mm.

Catalyst type

Use catalyst P2; below 50°F (10°C) for optimum results use
catalyst P4.


Weigh out only the proportion of material which can be
used within the pot life and place into a mixing container.
Measure the correct proportion of catalyst for the base
amount and carefully add this to the base using a suitable
clean implement. Mix thoroughly then add dye if required and
mix to an even color. After stirring it is best to remove the
contents from the mixing container into a shallow receptacle
and remix.

Pot life

50-60 Minutes at 68°F (20°C). Pot life will be shorter at
higher temperatures and longer at lower temperatures.
Where high temperaturesareencountered,refrigerate
materialbeforeuse or else seek the advice of Corrocoat

Volume solids

99.8%. This product contains volatile monomer convertible
to solid. Actual solids obtained will vary dependent upon cure

Practical spreading rate

Regular surfaces, e.g. new steel – 76 sf per gal (1.9kg/m²) @ 1mm
DFT. Irregular surfaces, e.g. pitted steel – 120 sf per gal (3kg/m²) @
1mm DFT.
NOTE: This information is given in good faith but may
increase dependent upon environment conditions, the
geometry and nature of work undertaken and the skill and
care of application. Corrocoat accepts no responsibility for
any deviation from these values.

Specific gravity

0.04lbs/cubic inch (1.23 gcm-3)

Flash point

90°F (32°C).

Volume solids

99.8%. This product contains volatile monomer convertible to solid. Actual solids obtained will vary dependent upon cure conditions.

Flash point

133°F (56°C).

Shrinkage ratio

Approximately 6.5% dependent upon speed of cure


Minimum 40 Barcol (ASTM) Standard D-2583.


May take place as soon as the previous coat has gelled
sufficientlyto resist movement of next application and while
still tacky.Maximum overcoating without treatment is 4 days
at 68°F (20°C) (shorter at ambient temperatures above 86°F