Series 391

Tank Armor

Generic Type

Polyamine Epoxy

Common Usage

An internal epoxy lining formulated for aggressive chemical immersion and corrosion control of chemical tanks. Suitable for domestic and industrial wastewater service with excellent resistance to severe environments including microbiologically induced corrosion (MIC) and high levels of H2S gas. Contains micro-fiber reinforcement for improved film integrity. Series 391 exhibits superior resistance to a wide range of chemicals, acids, and fractionation blends with excellent physical properties for long-term durability and service life of transport and storage tanks, and treatment basins. Contact Tnemec for more information.

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Note: Series 61 can be used as a primer under Series 391 depending on service conditions. Contact Tnemec Technical Service for recommendations.

Recommended DFT

20.0 to 40.0 mils (500 to 1,015 microns), one coat with multiple passes.
Note: Series 391 can be applied to an optional high build thickness of 50 mils (1270 microns) in a single coat to meet specific industry requirements.



Volatile Organic Compounds

Unthinned: 0.09 lbs/gallon (10 grams/litre)

Volume Solids

100% (mixed)

Number of Components

Two: Three Part A (epoxy) to One Part B (amine)


Unthinned: 0.00 lbs/gal solids

Curing Time

Temperature To Handle Max. Recoat Immersion
75°F (24°C) 8 hours 24 hours 5 days

Note: If more than 24 hours have elapsed between coats, the Series 391 coated surface must be mechanically abraded before topcoating. Note: For high temperature service (>90°F, 35°C) consult your Tnemec representative or Tnemec Technical Services. Curing time will vary with surface temperature, air movement, humidity and film thickness.

Theoretical Coverage

1,604 mil sq ft/gal (39.4 m²/L at 25 microns). See APPLICATION for coverage rates.

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