Polyglass Pipe Grade

Product reference: : 2/12

Product title: Polyglass Pipe Grade

Valid from: 12th April 2004

Last reviewed: May 2019


A polyester glass flake pipe coating, specifically for application using centrifugal pipe rolling techniques.

Suggested use

Internal pipe coating for use in hydrocarbons, aqueous, marine and corrosive chemical service environments below 185°F (85°C).


Not suitable for protection against polar solvents, demineralized water and where pH conditions are below 1 or above 12. Refer to Chemical resistance chart.

Health & safety

Before handling or using this product, the material safetydata sheet should be read, and all precautions observed.

Surface preparation

Metals: Grit blast to SSPC-SP10 (ISO standard 8501-1 Sa 2½) or equivalent. (For full details refer to CorrocoatSurface PreparationSP1.)Concrete: refer to Corrocoat data sheet SP5.

Application equipment

Specialist pipe rolling equipment.


Is dependent on intended service but Polyglass Pipe Grade is normally applied in a single wet film at between 40-78 mils (1000-2000 microns). Primer is not normally used. Forfurther details obtain Corrocoat Pipe Rolling instructions or refer to the CC training manual.

Storage life

Base 12 months, hardener (catalyst) 6 months stored at temperatures below 75°F (24°C) and away from heatsources and direct sunlight. Frequent temperature cycling will shorten storage life.

Color availability

Off white as standard.

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

40 sf per gal at 30 mils (1.0m2/litre at 750 microns). NOTE: This information is given in good faith, but rate may vary significantly 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.

Specific gravity

Polyglass PG base: 0.04lbs/cubic inch (1.19 gms/cc) Hardener: 0.03lbs/ cubic inch (1.07 gms/cc)

Curing time

Without inhibitor, tack free 6 hours, full cure 3-4 days at 68°F (20°C), but may be immersed in many environments after 12 hours. Low level through pipe ventilation should be maintained during cure.

Cleaning solvent

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

Recommended DFT

30 mils (750 microns) in marine conditions and up to 98 mils (2500 microns) in highly corrosive conditions, chemical or abrasive environments.

Catalyst type

Methyl Ethyl Ketone Peroxide type P2.

Mixing ratio / mixing

98:2 base to hardener. For mixing instructions and inhibitor use refer to Polyglass Data Sheet 6.20A. Do not use inhibitor unless necessary and add before catalyst when used.

Pot life

Typically, 25-30 minutes at 68°F (20°C). May be adjusted with inhibitor or manufactured specifically to suit specific requirements.


The performance of Polyglass Pipe Grade is adversely affected by the addition of solvent thinners and their use is prohibited. Thinning may be achieved by addition of not more than 5% styrene monomer to PPG by volume i.e. 0.25 gallons (1.00 litre) styrene per 5.25 gallons (20 litres) PPG.


1 Gallon and 5 Gallon Kits

Flash point

78°F (26°C).


40 Barcol.

Tensile strength

3700 psi (25.5 N/mm2)

Elongation at break

1.3% in aqueous immersion

Thermal coefficient of linear expansion

13.968 x 10-6 /°C.

Dielectric strength1

18 – 25 x 103 V/mm.

Thermal conductivity

 0.38 W/m0K

Temperature limits

185°F (85°C) immersed. 248°F (120°C) non-immersed. No known lower limit.


Normally applied as a single coat but where necessary it should 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).