Corrothane XT Pipe Grade

Product reference: 3/44

Product title: Corrothane XT Pipe Grade

Valid from: 6th February 2008

Last reviewed: 30th May 2019

Type: A three-pack cold cured vinyl ester – urethane polymer alloy with glassflake specifically formulated to be applied using a centrifugal pipe rolling rig. 

Suggested use

For coating both steel and concrete surfaces, where good chemical and high temperature resistance are 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 where possiblede-humidification equipment is used during the application of this product.

Health & safety

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

Surface preparation

Metals: Grit blast to SSPC-SP10 (ISO 8501-1 Sa 2½) standard and vacuum clean, refer to Corrocoat Data Sheet SP1.For other substrates and further information, refer to Corrocoat Technical Services.

Application equipment

Specialist pipe rolling equipment.


Dependent upon end use and application conditions, Corrothane XT is normally applied in wet films of 40-52 mils (1000-1300 microns). Where conditions allow it is preferable to apply the product in a single coat application. Where multi-coats are required it is essential that overcoating times are kept as short as is possible.

Mixing ratios

88.13 parts Base 01.32 parts Hardener A (organic peroxide)10.55 parts Hardener B (Isocyanate) (all ratios by weight)

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. The Base/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, 25 – 30 minutes at 68°F (20°C). Pot life will vary substantiallywith temperature. Refer to Corrocoattechnical services for instructions regarding application in hot climatic conditions.


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


1 Gallon and 5 Gallon kits. Due to the hydroscopic nature of this product the use of part tins is not recommended.

Storage life

6 Months stored and away from heat sources and direct sunlight andbelow 68°F (20°C). Frequent temperaturecycling 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. (All components must be used within their designated shelf life).

Color availability

Off white or unpigmented (translucent brown) 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 40mils (1000 microns) and 2mm dependent upon environment, see application recommendations above.

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

44 sf per gal at 30 mils (1.1 m²/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. Corrocoataccepts 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) Non-Immersed NOTE:These temperatures are maximums and are variable dependent upon environment.


Is not normally required. Pipe rolling application is carried out as a single coat procedure.

Curing Time

Full cure is 4 days at 68°F (20°C). For optimum results a post cure of 4 hours minimum at circa 176°F (80 ̊C) is recommended. However, post cure is not necessary formany environments.

Spark testing

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

Cleaning fluid

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