Series 90-98


Generic Type

Ethyl Silicate Inorganic Zinc-Rich

Common Usage

Self-curing, corrosion-resistant steel or ductile iron primer with tenacious bonding and abrasion resistance qualities. Its galvanic action resists undercutting. Excellent stand alone performance in high temperature or long-term atmospheric exposure. Finish with specialized topcoats to improve aesthetics, increase long-term performance or protect the primer from attack in aggressive exposures.

Special Qualifications

Zinc content surpasses the requirements of SSPC-PS 12.00 and ISO 8179-Part 2.

Series 90-98 meets AISC requirements of Class B surface with a mean slip coefficient no less than 0.50 and a tension creep not in excess of 0.005 inches (0.13 mm).

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  • Greenish Gray

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Theoretical Coverage

1,123 mil sq ft/gal (27.5 m²/L at 25 microns). See APPLICATION for coverage rates.

Volume Solids

70.0 ± 2.0% (practical)

Number of Components

Two: Part A and Part B

Recommended DFT

2.0 to 3.5 mils (50 to 90 microns) per coat.
Note: A minimum of 3.5 mils (90 microns) DFT is required to meet the qualifications of ISO 8179 Part 2. Note: Series 90-98 can be applied in one, high-build coat up to 6.0 mils (150 microns) DFT when left untopcoated.

Curing Time

Temperature (50% Relative Humidity) To Handle To Recoat
75°F (24°C) 1 hour 16 hours
0°F (-18°C) 7 days minimum

Moisture is required to achieve proper cure. Curing time will vary with temperature and humidity. At relative humidities below 30%, it may be necessary to gently spray the coated surface with water to achieve proper cure and to minimize recoat time. Consult your Tnemec representative for specific recommendations.

Volatile Organic Compounds

Unthinned: 3.48 lbs/gallon (417 grams/litre)
Thinned 9% (No. 15 Thinner): 3.75 lbs/gallon (449 grams/litre)
Thinned 6% (No. 18 Thinner): 3.75 lbs/gallon (449 grams/litre)


Series 27, 46H-413, 46-465, 66, 66HS, L69, L69F, N69, N69F, N140, N140F, 104, 113, 114, 161, 971, 1026.


Unthinned: 0.41 lbs/gal solids
Thinned 9% (No. 15 Thinner): 0.49 lbs/galon solids
Thinned 6% No. 18 Thinner): 0.41 lbs/gallon solids

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