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. Reference Tnemec’s certified product listing 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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Volume Solids

78% ± 2.0% (mixed) †


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

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.




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

Theoretical Coverage

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


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


Series 215, 217, 218

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.

Volatile Organic Compounds

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

Number of Components

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

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