Corroglass 632

Product reference: 1/11

Product title: Corroglass 632

Valid from: 27th November 1997

Last reviewed: 31 May 2019


A glass flake coating of medium viscosity based on top grade Vinyl Ester
Resin with low monomer content.

Suggested use

632 is predominantly used for coating intricate components by brush application, where ease of application and contour following are required. The material can also be spray applied using specialist equipment with “at gun catalyzation” to such items as pipework, tankage and flooring. 632 is often used as a primer in specifications containing Corroglass 602 as the main build material.


Not suitable for some highly polar solvents.

Health & safety

Before handling or using this product, the material safety
data sheet 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 SSPC-SP10 (ISO 8501-1 Sa
2½ near 3) or equivalent with a grit profile of at least 3 mils
(75 microns), 4-6 mils (100-125 microns) being the ideal
key. All blast residues should be removed by sweeping
clean and vacuuming where necessary. Coating of the
substrate should then take place as soon as possible. For
full Surface Preparation details see relevant Surface
preparation Specification Sheets.

Application equipment

Brush, Roller, Trowel or Special Spray


When used as a primer for Corroglass 602 the material
should be brush applied, vigorously working the coating into
the blast profile and ensuring that all the surface is wetted
out. Thickness is unimportant provided that if the surface is
to be left for any time the thickness should be enough to
prevent through film corrosion untilovercoated.
When used on its own 632 should be applied in multiple
layers to the specified DFT for the environment of use. Care
should be taken to avoid runs or sags, which although
seldom detrimental to the coating performance, may affect
fluid flow in pump impellers etc. UsualWFT applications are
between 6-14 mils (150-350 microns) for brush
applications and 20-24 mils (500-600 microns) sprayed.
In common with other materials within the range, dyes may
be added to affect a color change, but care should be taken
to keep addition of dye to a minimum. It is usual to overcoat
this product with 652 to obtain a smoother, more easily
cleaned and cosmetically superior surface finish, although this
is not necessary on purely corrosion protection grounds.

Mixing ratio

Corroglass 632 can be catalysed within the ratios of 100:1
parts base to catalyst by weight to 100:2 parts base to
catalyst by weight. The ratio should always be within these
limits, 2% addition of catalyst being the norm with a reduction
being made for high ambient temperatures.


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

Pot life

55 to 65 minutes at 68°F (20°C). Pot life will be shorter at
higher temperatures and longer at lower temperatures.
Where high temperaturesareencountered,refrigerate
material beforeuse or seek the advice of Corrocoat USA for
availability of inhibitor or material with longer pot life.


DO NOT THIN. The addition of Styrene may substantially
affect the chemical resistance of this product, particularly
where post curing is not carried out. NO OTHER DILUTENT


May take place as soon as previous coat has gelled
sufficiently to resist movement of next application and whilst
still tacky. Maximum overcoating without treatment 4 days.
Shorter at ambient temperatures above 86°F (30°C).
Once the maximum overcoating time has been reached, the
adhesion values attained by any subsequent coat willreduce
dramatically. It is important to observe maximum overcoating
times and note these will vary with climatic conditions. Any
further application of coating at this juncture should be
treated as a repair, with the surface flashed over to provide
a physical key. Styrene cannot be used to reactivate the
surface and may in some cases impair adhesion.


1 Gallon and 5 Gallon Kits

Storage life

6 months stored at temperatures below 68°F (20°C) and
away from radiating heat sources or direct sunlight (see
Shelf Life Information Sheet).

Color availability

Unpigmented (Translucent Brown) or Pigmented White.
Dyes can be used to effect color change where chemical
resistance is not of paramount importance.

Recommended DFT

0.7 to 2.0mm in multiple coats. Or as advised.

Theoretical spreading rate

32 sf per gallon at 40 mils dft

Volume solids

99.8% solvent free.

Practical spreading rate

Regular surfaces e.g. new steel – 25 sf per gallon at 40
mils dft, minimum. Irregular surfaces e.g. badly pitted steel –
15 sf per gallon at 40 mils 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 accept no responsibility for any
deviation from these values.

Specific gravity

0.05 lbs/cubic inch (1.22 gms/cc)

Flash point

100°F (38°C)

Catalyst type

Methyl Ethyl Ketone Peroxide: Corrocoat Type P2

Mixing ratio

100:1 to 100:2 base to catalyst


45 Barcol (approximate)

Tensile strength

4260 psi (29.3 N/mm²)

Cohesive strength

3492 psi (24.1 N/mm²)

Thermal Coefficient of Linear Expansion

19.6 x 10-6/°C

Moisture vapor transmission rate

0.936 x 10-2 gms/hr/m²
(0.0006 perm inches)

Thermal conductivity

0.415 W/m°K

Dielectric strength

Approximately 26 kV at 1mm film. Arc resistance 60 seconds

Temperature limits

Dependent upon environment.
230°F(110°C) immersed.
392°F(200°C) non-immersed.

Cleaning fluid

Acetone or Methyl Ethyl Ketone before gel.
Trichloroethane after gel.


For best surface finish use pure carbide or carbide tips with
small radius and neutral rake. Material has similar machining
characteristics to those of grey cast iron. Tool must be kept
sharp. Run out will occur due to tool wear over relatively short
distances, especially when facing from OD to center. Clean
water may be used as lubricant or dustdamper.

Cure time

At 68°F (20°C), 90% cure will be attained within 8 hours.Full cure for chemical resistance will be 6 days. Cure time may be shortened and a beneficial increase in final cure may be attained by post heat treatment. ConsultCorrocoat USA for specific information.Although not cured, after gelling this material may be immersed in some environments without detriment to the coating.