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TECHNICAL DATA SHEET I SECTION 2.2
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POLYPRIME 21
Two-Component,
Epoxy-Polyamine Primer

Product Description
Polyprime 21 is a two-component, high solids, liquid Technical Data (Based on Draw Down Film)
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applied, epoxy-polyamine primer with unique penetrating
characteristics. Polyprime 21 is ANSI/NSF 61 approved for Coverage Rate 1 gal/300 sqft
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direct contact with potable water. 0.14 l/sqm
Features Typical Uses Dry Film Thickness per 5 ± 1 mils

• Seamless • Concrete Coat 127 ±25 microns
• Excellent Adhesion • Plywood
• Low Viscosity Mixing Ratio 2A : 1B

Pot Life at 75ºF (24ºC), 50% 20-30 min
Packaging RH

3-Gallon Kit One 3.5 gallon pail, net fill 2 Hardness, ASTM D2240 70 ± 5 Shore D
gallons (7.57 liters) of Side-A
and One 1 gallon (3.78 liters)
can of Side-B Specific Gravity,
Side-A 1.09 ± 0.1
15-Gallon Kit Two 5 gallon (18.9 liters) Side-B 1.06 ± 0.1
pails of Side-A and One 5
gallon (18.9 liters) pail of
Side-B Total Solids by Weight, 91 + 2%
ASTM D2369

Color Total Solids by Volume, 90 + 2%
Side-A: Blue, Side-B: Yellow ASTM D2697
Coverage Viscosity at 75°F (24°C) 600 ± 50 cps
The approximate coverage is 1 gallon/300 sqft (0.14 l/sqm) Side-A & Side-B combined
or 300 sqft/gallon. Coverage rate will depend on surface
roughness and porosity. Volatile Organic
Compounds, 0.75 lb/gal
Surface Preparation ASTM D2369-81 90 gm/liters
Remove all contaminant, oil and grease from substrate. Refer
to General Guidelines for complete information.

Mixing
The volume mixing ratio is 2 parts Side-A Blue Liquid to 1 part
Side-B Yellow Liquid, (2A:1B). and 50% relative humidity.

Polyprime 21 Side-A and Side-B should be thoroughly mixed Recommended surface temperature should be greater than
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individually prior to combining to ensure a homogeneous 50°F (10°C) and at least 5°F (3°C) above the dew point.
material. Polyprime 21 must always be mixed with two parts
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Side-A and one part Side-B (2A:1B). The combined components Polyprime 21 is very sensitive to heat. Higher temperatures
should be thoroughly mixed using a mechanical mixer at slow will significantly accelerate the cure time and pot life. Use
speed. Do not mix in an up and down motion. caution in batch sizes and thickness of application.
Application Low temperature and/or low humidity extend the cure time.
It can be applied using an airless sprayer, brush, or phenolic
resin core roller. Cleanup
Equipment should be cleaned with an environmentally safe
Allow Polyprime 21 to become tack free before applying the solvent, as permitted under local regulations, immediately
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coating. Approximate tack free time is 4-6 hours at 75°F (24°C) after use.

POLYCOAT PRODUCTS TEL 562.802.8834 | FAX 562.921.7363 Section 2.2
info@polycoatusa.com | www.polycoatusa.com