Corrothane XT Hand Applied

Product reference: 3/28

Product title: Corrothane XT Hand Applied

Valid from: 23rd January 2007

Last reviewed: 30th May 2019


Ahand applied, three-pack cold cured, vinyl ester-urethane polymer alloy,
glass flake coating.

Suggested use

For coating both steel and concrete surfaces, where good
chemicaland high temperatureresistanceare required, either
for immersed or non-immersed service.


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

Health & safety

Before handling or using this product, the material safety
data sheet should be read, and all precautions observed.
Particular attention is drawn to Hardener B which contains

Surface preparation

Metals: Grit blast to SSPC-SP10 (ISO 8502-2 Sa 2½)
standard and vacuum clean, refer to Corrocoat Data Sheet
For other substrates and further information, refer to
Corrocoat Technical Services.

Application equipment

May be applied by brush, trowel or roller


Dependent upon intended use and site conditions, but
Corrothane XTHAis normally applied in wet films between
12-24 mils (300-600 microns).

Mixing ratios

 (All ratios by weight)
88.43 parts Base
1.31 parts Hardener A (organic peroxide)
10.26 parts Hardener B (Isocyanate)

Mixing instructions

Product should be at ambient temperature before
mixing. Mix the base with a good mechanical stirrer until it
is uniformly mixed.Add Hardener A(organic peroxide) to the
Base and mix thoroughly. Allow mix to stand for a minimum
period of 10 minutes. Thoroughly stir the Base/peroxide mix
again and leave to stand for a further minimum period of 10
minutes (NB.TheBase/peroxide blend is relatively stable and
will not react significantly until Hardener B is added). Add
Hardener B(Isocyanate)and mix thoroughly before applying.

Pot life

Generally, 50-70 minutes at 68°F (20°C). Pot life will vary
substantially with temperature. Refer to Corrocoat technical
services for instructions regarding application in hot climatic


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


1 Liter and 5 Liter Kits. Due to the moisture sensitive
nature of this material, it is not advisable that kits are
divided on site

Storage life

6 months stored and away from heat sources and direct
sunlight and below 68°F (20°C). Frequent temperature
cycling will shorten storage life and affect pot life. Beyond 6
months this product becomes increasingly susceptible to
moisture uptake and foaming and out of shelf-life material
must not be used. (Discoloration of Hardener B will occur
with time; this has no detrimental effect on the product. All
components must be used within their designated shelf

Color availability

Unpigmented (translucent brown) and off white only.Other
colors are not available, and it should be noted that the
addition of dyes will adversely affect performance and in
particular chemical resistance.

Recommended DFT

Between 20 mils (500 microns) & 3mm dependent upon

Theoretical spreading rate

54 sf per gal at 30 mils (1.33m²/litre at 750 microns).

Volume solids

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

Practical spreading rate

43 sf per gal at 30 mils (1.06m²/litre at 750 microns).
NOTE: This information is given in good faith, but
consumption 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.

Flash point

88°F (31°C).

Temperature limits

302°F (150ºC) Immersed. No known
lower limit. 500°F (260ºC) NonImmersed
NOTE:Thesetemperatures aremaximums andare variable
dependent upon environment.


It is recommended that over coating takes place within a
maximum of 12 hours at 68°F (20ºC). Although longer over
coating times may be acceptable this will depend upon
climatic conditions and the levelof ultravioletlightthat can
significantly accelerate speed of cure.

Curing time

Full cure circa 4 days at 68°F (20°C). For best results a short
post cure of 4 to 6 hours at 176°F (80°C) is recommended.
However, post cure is not necessary for many environment

Spark testing

This product is subject to dielectric fatigue and repeated
testing should be avoided, refer to data sheet 7/30.

Cleaning fluid

Acetone, Methyl Ethyl Ketone, Methyl Iso Butyl Ketone
– before gelation