Series 20HS


Generic Type

Polyamide Epoxy

Common Usage

A high-solids, lower VOC version of Tnemec’s proven polyamide epoxy technology. Provides excellent protection to steel and concrete substrates, and is certified for use in potable water immersion. Excellent choice for tanks, valves, and pipes.

Special Qualifications

Certified by NSF International in accordance with NSF/ANSI Std. 61. Seven day ambient air cured Series 20HS is qualified for interior use on tanks and reservoirs of 300 gallons (1,135 L) capacity or greater, pipes 18 inches (46 cm) in diameter or greater, valves 3.5 inches (9 cm) in diameter or greater, fittings 1 inch (3 cm) in diameter or greater and pumps 3.5 inches (9 cm) in diameter or greater. Sixty day ambient air cured Series 20HS is qualified for use on pipes 14 inches (35 cm) in diameter or greater. Reference the "Search Listings" section of the NSF website at for details on the maximum allowable DFT. Conforms to AWWA D102 Inside Systems No. 1 and No. 2. Conforms to AWWA C210 (without 44-705). Contact your Tnemec representative for systems and additional information.

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215, 217, 218


Unthinned: 1.17 lbs/gal solids
Thinned 10% (No. 4 Thinner): 1.88 lbs/gal solids

Volume Solids

78% ± 2.0% (mixed) †

Curing Time

Temperature To Touch To Handle To Recoat Immersion
95°F (35°C) 1 hour 3 hours 6-7 hours 7 days
75°F (24°C) 2 hours 8 hours 12-16 hours 7 days
55°F (13°C) 4 hours 22-24 hours 30-34 hours 12-14 days

Curing time varies with surface temperature, air movement, humidity and film thickness. Note: For faster curing and low temperature applications, add No. 44-705 Epoxy Accelerator, see separate product data sheet for cure information.
Ventilation: When used as a tank lining or in enclosed areas, provide adequate ventilation during application and cure.


Steel: Self-priming or Series 1, 20, FC20, FC20HS, 91-H2O, 94-H2O, L140, L140F, N140, N140F, V140, V140F
Concrete: Self-priming, 20, FC20HS

Number of Components

Two: Part A (epoxy) and Part B (polyamide)

Volatile Organic Compounds

Unthinned: 1.54 lbs/gal (184 grams/litre)
Thinned 10% (No. 4 Thinner): 2.02 lbs/gal (243 grams/litre)

Theoretical Coverage

1,249 mil sq ft/gal (30.7 m²/L at 25 microns). See APPLICATION for coverage rates. †


Interior: 20, FC20, 20HS, 22, FC22, L140, L140F, N140, N140F, V140, V140F, 264, 265, 406
Exterior: 20, FC20, 20HS, FC20HS, 66HS, L69, L69F, N69, N69F, 72, 73, L140, L140F, N140, N140F, V140, V140F, 161HS, 264, 265, 406, 700, V700, 701, V701, 740, 750, 1074, 1074U, 1075, 1075U, 1095.
Note: When topcoating Series 20HS, the following maximum recoat times apply: with 264 or 265, 7 days; with 406, 14 days; with 740 or 750, 21 days; with 1095, 30 days; with itself, 20, FC20, FC20HS, 22, FC22, L140, L140F, N140, N140F, V140, V140F, 161HS, 700, V700, 701 and V701, 60 days; with 72, 73, 1074, 1074U, 1075 and 1075U, 90 days. Scarify the Series 20HS surface before topcoating if maximum recoat time has elapsed.

Recommended DFT

2.0 to 10.0 mils (50 to 254 microns) per coat.
Note: Number of coats and thickness requirements will vary with substrate, application method and exposure. Contact your Tnemec representative.

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