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ARCOR® 8518 is a solvent-free, ceramic-filled, high-functionality epoxy Novolac coating specifically designed for both immersion and non-immersion service. This exceptional coating is particularly well-suited for aggressive acid and alkali environments with elevated temperatures and/or abrasion. Applied on ferrous and non-ferrous metals as well as concrete, 8518 forms a resilient, chemical-resistant barrier. Its incorporation of Reactive Flexibility agents ensures excellent flexibility while maintaining outstanding resistance to chemicals and temperature, making it an ideal choice for large tank walls and floors without the need for fiberglass mat reinforcement. With its low viscosity, ARCOR® 8518 can be conveniently applied by hand or spray, achieving thicknesses of up to 80 mils per coat. This versatile coating solution provides long-lasting protection in demanding environments, delivering both reliability and performance. ARCOR Epoxy Technologies can tailor make or reformulate the product to suit customer needs. Please reach out if you need a custom formulated product!

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

Application Area: Flue Gas Desulfurization (FGD), HVAC Ducts, Induced Draught Fan (ID Fan) , Scrubber, Tank Lining

Compatible Substrates & Surfaces: Concrete, Metal

Features: Acid Resistant, Alkali Resistant, Chemical Resistant, Corrosion Resistant, Excellent Solvent Resistance, Good Abrasion Resistance, Good Flexibility

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

Chemical Family: Epoxy & Epoxy Derivatives

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Identification & Functionality

Features & Benefits

Labeling Claims

Applications & Uses

Markets
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.

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.

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 1 parts Base to 1 part Activator. Or by weight 100 grams base to 116 grams activator. Mix thoroughly to produce an even colored and streak-free material.

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 1/8” nap.
Plural Spray: 0.029-0.035 tip, 3,500-4,500 PSI, Heat to 150ºF Base, 100ºF Activator. Use 30 mesh screens. Heated hose at 120-140ºF.
Airless Spray: 0.029-0.035 tip, 4,000-4,500 PSI(45:1). Use only with in-line heater at 120º to 140ºF.(Caution: Short Pot-Life)
Conventional Spray: Not Recommended.
All spray equipment should employ traps to prevent water and oil from contaminating coating and 30 mesh screens to prevent particulate
contamination.

Aggressive Chemical Tank Linings and Secondary Containment Areas, FGD; Ducts, Mix Zones, I.D. Fans, Scrubbers. Excellent when force cure is not available.
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 30-45 seconds for a 1 KG 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 re-coat while material is still soft, but tack-free, between 6-14 hours at 77ºF(25ºC). If overcoat window is exceeded abrade surface with course sandpaper, grinder or brush blast. By spray application re-coat between 2-14 hours at 77ºF. Full cure before immersion 72 hours at 77ºF. Add 30 hours additional cure time for each 10ºF below 77ºF. Subtract 12 hours of cure time for each 10ºF above 77ºF. Force Cure with heat for best performance for 4 hours at 200ºF(93ºC), 12 hours at 150ºF( 66ºC).

Clean Up

Clean tools immediately after use with M.E.K., Acetone, 98+% Isopropyl Alcohol or similar

Properties

Temperature Properties
ValueUnitsTest Method / Conditions
Maximum Temperature for Immersion Service129.0°C-
Temperature Spike Tolerance for Immersion Service (3hrs)204.0°C-
Recommended Force Cure Temperature (8hrs)49.0°C-
Specifications
ValueUnitsTest Method / Conditions
Coverage (at 20 mils / kg)35.0sq. ft.-
Solid Content100.0% Volume-
Viscosity40,000-65,000cps-
Pot Life (at 72°F)25.0min/kg-
Chemical Resistance
Water Excellent
Alkalis Excellent
Inorganic Acids Excellent
Organic Acids Good
Organic Solvents Good
Film Thickness

20 -80 mils(.51-2.04 mm)/coat

Splash: 2 coats, Immersion: 2-3 coats

Flexibility

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

Mix Ratio

1:1 by Volume (Base:Activator) 100 gm: 116 gm by weight

Packaging & Availability

Weight per Gallon

10.2 lbs (4.62 KG)

Storage & Handling

Shelf Life
5 Years (at 13-35ºC)