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ARCOR® 1321 is a high-performance, solvent-free bisphenol F coating designed to provide reliable protection in both immersion and non-immersion service, particularly in aggressive environments. This self-priming coating forms a tough and chemical-resistant barrier on various surfaces including ferrous and non-ferrous metals as well as concrete structures. With its low viscosity and excellent flexibility, ARCOR® 1321 is well-suited for external applications that are exposed to aggressive conditions. It can be easily applied by hand or spray onto metal or concrete surfaces. The extended pot-life and overcoat window make it an ideal choice for larger surface area applications using airless or plural component spray equipment. Additionally, ARCOR® 1321 exhibits excellent UV stability, ensuring long-lasting performance even in outdoor environments. ARCOR Epoxy Technologies can tailor make or reformulate the product to suit customer needs. Please reach out if you need a custom formulated product!

Chemical Family: Epoxy & Epoxy Derivatives

Product Type: Epoxy Coating, Primer, Solventless & High Solids Coating, Top Coat

Application Method: Air Knife Coating, Brush, Roller, Spray, Wipe

Compatible Substrates & Surfaces: Concrete, Metal

Features: Acid Resistant, Alkali Resistant, Chemical Resistant, Corrosion Resistant, Excellent Solvent Resistance, Excellent UV Stability, Good Abrasion Resistance, Good Bonding Strength, Good Erosion Resistance, Good Flexibility, High Surface Area, Long Potlife, Low Viscosity, Salt Water/Spray Resistant, Self-Priming

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Identification & Functionality

Features & Benefits

Labeling Claims

Applications & Uses

Compatible Substrates & Surfaces
Cure Method
Surface Preparation

Steel surfaces are to be abrasive blasted with chloride free abrasive. Exterior applications to SSPC SP-10 Near White metal finish. Immersion applications to SSPC SP-5 White metal 3 to 5 mil profile. Grind flat all burrs, weld seams, radius sharp edges. Fresh blasted ferrous surfaces to be should be coated immediately with ARCOR™ 1321K to prevent oxidation of surface. For very large areas ARCOR™ EE-80 can be used as a pre-prime to help hold the blast.

Concrete surfaces should be degreased if oil and grease contamination is present. Degreased surface shall be high pressure washed, acid etched and high pressure washed again so surface is clean and free of all grease, oils and surface laitance. Existing coatings should be abrasive blasted to clean concrete. Prime with ARCOR™ 1321K.

Mixing

Thoroughly mix Activator into Base with mixing stick or drill with low speed mixing blade scraping sides and bottom of container or mixing board. Mix by Volume 2 parts Base to 1 part Activator. Or by weight 100 grams base to 36 grams activator. Mix thoroughly to produce an even colored and streak-free material.

Thinning
Not Advised; but if necessary add 5% by volume(6oz/gal.) Acetone or MEK to extend pot-life and/or thin for cold weather application.
Application

Brush: medium to stiff bristle of sufficient quality that bristles do not pull out and stick in coating. Trim or tape to <1” nap.
Roller: good quality 3/8” nap.
Plural Spray: 0.027-0.035 tip, 2,000-3,500 PSI, Heat to 110ºF Base, 90ºF Activator. 30 mesh screens. Heated hose @ 120ºF
Airless Spray: 0.027-0.035 tip, 4,000-4,500 PSI(45:1). Add 6-oz/gal of MEK or Acetone.(Caution: Short Pot-Life)
Conventional Spray: Not Recommended.
All spray equipment should employ traps to prevent water and oil from contaminating coating and screens to prevent particulate contamination.

Ideal for exterior applications to resist exposure to Salt Water; Caustics, Alcohols, Acids. Also suitable for immersion service in water (brakish, salt) and Caustics. Excellent for Secondary Containment’s.
Application Temperature
Keep between 55 to 95ºF(17 to 35ºC). Substrate: Keep between 45 to 105ºF(7 to 40ºC). The difference in temperature of the substrate and the material should never exceed 10ºF(5ºC). Substrate shall be a minimum of 5ºF(3ºC) above dew point. Do not apply if relative humidity exceeds 90%. If necessary heat metal prior to surface preparation using electric heater or heat lamp. Never use gas, oil or kerosene heaters as they will leave a greasy residue on metal surface. For best results keep all material in warm area overnight(75ºF+, 24ºC) for ease of mixing. If necessary Base component of material can be heated by microwave for 30 seconds for a 1 MK Base unit or by warm water bath. Heat activator by warm water bath only. If necessary let material cool before application.
Overcoat / Cure Time

By brush, roller or squeegee recoat while material is still soft, but tack-free, between 1-12 hours at 77ºF(25ºC). If overcoat window is exceeded abrade surface with course sandpaper, grinder or brush blast. By spray application a single coat to 20 milsis recommended. For multiple coats, recoat between 1-12 hours at 72ºF. Full cure before chemical immersion 72 hours at 72ºF. Add 12 hours additional cure time for each 10ºF below 72ºF. Subtract 12 hours of cure time for each 10ºF above 72ºF. Force Cure with heat for best performance for 4 hours at 150ºF(66ºC), 12 hours at 100ºF( 38ºC).

Clean Up

Clean tools immediately after use with M.E.K. or similar. Isopropyl Alcohol can be used in solvent restricted areas.

Properties

Temperature Properties
ValueUnitsTest Method / Conditions
Maximum Temperature for Immersion Service63.0°C
Temperature Spike Tolerance for Immersion Service (3hrs)93.0°C
Maximum Temperature for Dry Heat163.0°C
Specifications
ValueUnitsTest Method / Conditions
Solid Content100.0% Volume
Viscosity5,000-15,000cps
Pot Life (at 72°F)35.0min/kg
Coverage (at 20 mils)80.0ft² / gal / coat
Chemical Resistance
Water Excellent
Alkalis Excellent
Inorganic Acids Good
Organic Acids Good
Organic Solvents Good
Film Thickness

Can be applied up to 20 mils in a single coat. Single coat spray application. Hand application may require a 2nd coat.

Flexibility

Very Good Excellent with Polyester Cloth; 1.5 oz/ft2 (.5 KG/M2)

Mix Ratio

2:1 by Volume (Base:Activator) 100 gm: 35 gm by weight

Packaging & Availability

Weight per Gallon

11.6 lbs (5.27 KG), (231 cu.in.)

Storage & Handling

Shelf Life
5 Years (at 13-35ºC)