Corrothane XT Veilcoat

Product reference: 3/66

Product title: CorrothaneXT Veilcoat

Valid from: 22nd December 2004

Last reviewed: May 2019

Type: Athree-pack coldcuredvinylester/urethaneIPN(InterpenetratingPolymer

Suggested use

As a topcoat for Corrothane XT products in aggressive
service environments which may affect glass or where a
smooth surface veil is required.


This product is extremely moisture sensitive and may foam
if mixed or applied at relative humidities above 75% or in
moisture condensing conditions. Tins are nitrogen filled, do
not open before use. It is strongly recommended that
de-humidification equipment is used during the application of
this product.

Health & safety

Before handling or using this product it is important that
the material safety data sheet is read and all precautions
observed. Attention is drawn to Hardener B which contains

Surface preparation

XT Veilcoat is applied over Corrothane XT while still tacky or
before the maximum over coating period has expired.

Mixing instructions

Mix the base with a mechanical stirrer until it is uniformly
mixed. Add Hardener A (organic peroxide) to the Base and
mix thoroughly, allow to stand for 10 minutes. Thoroughly
stir the Base/peroxide blend again and leave to stand for a
further 5 minutes (NB. The Base/peroxide blend is relatively
stable and will not react significantly until the Hardener B is
added). Add Hardener B (Isocyanate) and mix thoroughly
before applying.

Pot life

Variable dependent upon temperature. 40-60 Minutes at
68°F (20°C) Refer to Corrocoat technical services for
instructions regarding application in hot climatic

Theoretical spreading rate

136 sf per gal at 12 mils (3.33m²/litre at 300 microns).

Volume solids

This material contains volatile liquid convertible to solids.
Volume solids obtained will vary dependent upon
polymerisation conditions. Nominally 99% of the contents are
convertible to solid.

Curing time

Cure before service is 4 days at 68°F (20°C). For optimum
results a short post cure for 4 hours at 140-176°F (60-80°C) is
recommended. This is not necessary for many

Volume solids

This material contains volatile liquid convertible to solids. Volume solids obtained will vary dependent upon polymerisation conditions. Nominally 99% of the contents are convertible to solid.

Practical spreading rate

82 sf per gal at 12 mils (2.0m²/litre at 300 microns).
NOTE: This information is given in good faith but may vary
dependent upon environmental 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.

Mixing ratio / mixing

By Weight:
87.83 parts Base
01.57 parts Hardener A (organic peroxide)
10.60 parts Hardener B (Isocyanate)

Application equipment

45:1 or greater airless spray pump, with an output of at least
1 gallon (4 litres) per minute. Spray tip and fan pattern can
vary and should be selected to suit the nature of the work.
XT Veilcoat can be applied by brush or roller in areas of
limited access but not generally recommended.


Due to the hydroscopic nature of this product, the Base
and Hardener B should be kept sealed until required. It is
recommended that kit sizes are ordered to allow complete
use of the product during each application to prevent
moisture absorption when using part tins.
Dependent upon end use and application conditions,
Corrothane XT is normally applied in wet film thickness of
between 8-15 mils (200-375 microns).


The performance of Corrothane XT will be adversely
affected by the addition of solvent thinners and their use is


1 Gallon and 5 Gallon kits

Storage life

6 Months unopened stored at temperatures below 68°F
(20°C) and away from heat sources and direct sunlight.
Frequent temperature cycling will shorten storagelife.

Color availability

Unpigmented(translucentamber/brown) only.Other colors
are not available and it should be noted that the addition of
dyes will adversely affect chemicalresistance.

Recommended DFT

Between 8-12 mils (200-350 microns), as required.

Flash point

88°F (31°C).

Temperature limits

302°F (150°C) Immersed. No known
lower limit. 500°F (260°C) Non
Variable dependent upon environment.


May take place as soon as the previous coat has gelled and
while still tacky. Maximum overcoating time is 48 hours at
68°F (20°C).XT Veilcoatis normally applied in a single
application but may be over coated where required.

Cleaning fluid

Methyl Ethyl Ketone, Methyl Iso Butyl Ketone and Acetone
– before gelation. These fluids are flammable. Observe
Safety Regulations.