4320 High Performance Lining

General Description
DUROMAR HPL-4320 is a high functionality, 100% solids novolac material, designed for concentrated sulfuric acid and other inorganic acid service. It can be applied by hand, but it is most efficiently applied over large areas by plural component airless. Requires elevated temperature cure.

Chemical Description
Multi-functional epoxy with a uniquely modified cycloaliphatic amine hardener.

Pot Life at 70 F 20 min.
Components 2
Visual Appearance High Gloss
Density 1.31
Solids by Weight 100 percentage
pH Range 0.5 – 14.0
Inorganic Acids Excellent
Organic Acids Very Good
Alkalis Excellent
Solvents Very Good
Hydrocarbons Excellent
Max. Dry Operating Temperature 375 F
Functional Cure 48 hours
Full Cure 168 hours
Repair System EXP
Surface Prep SSPC-5
Adhesion Excellent
Flexibility Good
Equipment Brush, Roller, Plural Component
Number of Coats 2 – 3
Theoretical Coverage Per Gallon 40 mil. sq. ft.
Film Thickness Per Coat 10 mils min.
30 mils max.
Maximum DFT 60 mils
Recoat Time at 70 F 24 hours max.
3 hours min.
Min. Application Temperature 65 F
Mixing Ratio by Weight 2.5:1 (B/A)
Mixing Ratio by Volume 2:1 (B/A)
Dry to Touch 3 hours
Force Curing
Force cures are recommended for severe service conditions as both physical and chemical properties are enhanced. Force curing should not start until material has firmly set. Contact DUROMAR for specific instructions.
Storage This product has a minimum shelf life of one year when stored in a dry area at 50 F – 100 F in the original sealed container.
Handling and Safety
Warning Eye and skin irritant. May cause dermatitis and sensitization.

Always read and understand the product MSDS.

Avoid contact with eyes, skin or clothing. Avoid breathing vapor, mist or spray. Use with good ventilation.

First Aid
In case of contact:
Eyes: Immediately flush with water for at least 15 minutes.
Skin: Immediately remove from skin with dry cloth followed by thorough washing with soap and water.
Inhalation: Remove to fresh air. If breathing is difficult, give oxygen.
Ingestion: Give large quantity of milk or water, induce vomiting. Contact a physician immediately.

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