Series 27WB


Generic Type

Inorganic Hybrid Water-Based Epoxy

Common Usage

A unique, low odor, low VOC, water-based epoxy coating featuring HydroLink curing technology for exceptional durability and corrosion resistance. Used for the protection and finishing of steel and concrete structures including structural steel, tanks, pipes, and equipment. Superior wetting for marginally prepared steel and tightly adhered existing coatings. This coating is ideally suited for steel fabrication and OEM applications, with fast-curing and rapid handling properties. Series 27WB exhibits low yellowing and good color stability in whites and light tone colors. Formula protected under U.S. patent.

Special Qualifications

Series 27WB was tested in accordance with, and passed, the California Department of Public Health CDPH/EHLB/Standard Method Version 1.1, 2010 emissions testing and meets qualifications of LEED v4, Collaborative for High Performance Schools, and Living Building Challenge.

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Volume Solids

100% (mixed) †

Volatile Organic Compounds

Unthinned: 0.01 lbs/gallon (0.9 grams/litre) †

Number of Components

Two: Part A and Part B (One Part A to One Part B by volume.)




0 lbs/gal solids


Steel: Self-priming or Series 1, 66, 66HS, L69, L69F, N69, N69F, 90G-1K97, 90-97, H90-97, 91-H₂O, 94-H₂O, 161, 161HS, 394. Note: Series 1, 90G-1K97, 90-97, H90-97, 91-H₂O, 94-H₂O and 394 must be exterior exposed for 24 hours prior to topcoating.
Galvanized Steel: Self-priming
Concrete: Self-priming, 215, 217, 218, 1254
CMU: Self-priming, 130, 215, 1254
Drywall: Self-priming, 151


Series 30, 66HS, 72, 73, 113, 114, 115, 156, 157, 158, 161HS, 180, 181, 270, 273, 280, 281, 287, 290, 291, 297•, 406, 435, 436, 446, 740, 750, 1026, 1028, 1029, 1070, 1070V, 1071, 1071V, 1072, 1072V, 1074, 1074U, 1075, 1075U, 1077, 1078, 1080•, 1081•. Note: When topcoating with Series 740 or 750 over 27WB, a 90 day maximum recoat time applies. •An extended cure time is needed when topcoating with Series 297, 1080 or 1081. Reference additional recoat times listed below the cure table. Note: More than one finish coat may be required to achieve uniform and desired gloss level.

Curing Time

Temperature To Touch To Handle To Recoat†
120°F (49°C) 15 minutes 1 hour 2 hours
95°F (35°C) 30 minutes 2 hours 3 hours
75°F (24°C) 1 hour 6 hours 8 hours
55°F (13°C) 2 hours 8 hours 16 hours
45°F (7°C) 3 hours 10 hours 24 hours
35°F (2°C) 4 hours 3 days 4 days

Curing time varies with surface temperature, air movement, humidity and film thickness. For immersion service cure a minimum of 24 hours at 75°F (24°C). The following minimum recoat times apply when topcoating with Series 297, 1080 or 1081: 95°F (35°C) 12 hours, 75°F (24°C) and 55°F (13°C) 24 hours, 45°F (7°C) 4 days, 35°F (2°C) 7 days. Note: For faster cure in temperatures down to 35°F (2°C), add No. 44-700 Epoxy Accelerator, see separate product data sheet for cure information. Note: The use of Series 44-700 Accelerator is not recommended when temperatures exceed 75°F (24°C).

Recommended DFT

3.0 to 14.0 mils (75 to 350 microns) per coat. Note: Number of coats and thickness requirements will vary with substrate, application method and exposure. Contact your Tnemec representative.

Theoretical Coverage

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

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