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Data Sheet:91Supersedes: 02/04

Revised: 05/08

Composition AMERCOAT 91 is a two pack, high solids, high performance epoxy novolac tank lining sometimesreferred to as epoxy phenolic tank lining.

Uses andProperties

AMERCOAT 91 has the following properties:

High performance tanklining

Broad spectrum of chemical resistance

Withstands continuous immersion in deionized water up to 93C

Withstands continuous immersion in hot concentrated brine up to 71C

Withstands continuous immersion in hot sour crude up to 149C

AMERCOAT 91 has excellent resistance to continuous and alternating service for a wide range of

chemicals, solvents, caustic, crude and fuel oils, as well as neutral, alkaline and non-oxidising saltsolutions in water. It may be cleaned between cargoes with steam cleaning, up to a temperature of

82C.

TypicalApplications

AMERCOAT 91 provides excellent protection to prepared:

Steel and concrete exposed to chemical immersion, splash, spillage and fumes

Tank lining for roadtankers

Storage tanks in the chemical and petrochemical industries

Coating for steel pipes under insulation

Typical Systems Substrate Surface Preparation Typical Systems dft m

Steel (for tanklining use)

Abrasive blast clean to A.S.1627.4Class 3 with profile of 50-75 mm.

1st

Coat: AMERCOAT 91

2nd

Coat:AMERCOAT 91

Total b

125125

250

Steel (non-immersed,under insulationetc.)

Abrasive blast clean to AS 1627.4Class 2 .

1st

Coat: AMERCOAT 91

2nd

Coat:AMERCOAT 91

Total b

125125250

Stainless Steel Abrasive blast clean to AS1627.4 Class2 using non-metallic abrasive grit to

provide a profile of 40 60 m.

1st

Coat: AMERCOAT 912

ndCoat: AMERCOAT 91

Total b

125125250

Concrete Allow to cure for 28 days. Must beclean and free from all oils, fats orgreases. Degrease or scrub with

detergents if necessary. The concretemust be free from any incompatibleadditives or curing agents. Acid etch orabrasive blast clean (refer SurfacePreparation Guide for Concrete) and fillany holes or cracks.

1st

Coat: AMERCOAT 91

2nd

Coat:AMERCOAT 91

Total b

125125250

b Total dry film thickness must not exceed 350 m in two coats and must not be less than 200 m.

Epoxy Novolac Tank Lining

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General Data

Weathering Excellent. Chalking does not detract from general durability. Suitable for internal andexternal use.

Finish Low gloss.

Chemical Resistance Excellent. Superior to standard conventional epoxies.

For a comprehensive listing of chemical resistance, contact your PPG representative.

Solvent Resistance Excellent.

Abrasion Resistance Excellent.

Immersion Excellent.

Temperature

Resistance

Wet DryTemperature Range

Continuous 93 C 204 C

With 880 Glass Flake Additive (2 L per 4L mixed material)

Continuous 218C

Intermittent 232C

Colour Light Buff, White

Topcoating Not normally required. Consult your PPG representative for recommendations.

Shelf Life 24 months if stored under proper conditions in unopened container.

Application Data

Theoretical Coverage 4.32 sqm/L at a DFT of 125 mVolume Solids 54 3%

Touch Dry 1 hr

Minimum Recoat Time 16 hrs

Immersion Minimum 7 Days

Drying Time (@ 25C)

Maximum recoat time at 24C with itself 90 days. Allowances should be made formoisture on surface at low temperatures.

Optimal PaintingConditions

Substrate temperatures must be at least 3C above the dew point.Relative humidity less than 85%

Surface temperature above 5C and less than 55C.

Mixing Ratio V/V 7.3 parts resin to 1 part cure. Use complete pack.

Pot Life 6 hours @ 21C NOTE: The figure quoted for pot life and drying/curing times are notdefinitive. They are dependent on site conditions, such as volume of material mixed,ambient and steel temperatures, weather and ventilation.

Mixing Power stir the Base and Hardener, then add the Hardener to the Base with stirring.Allow to digest 15 minutes minimum before thinning.

Thinners Thinner 737 Use up to 1.5% v/v maximum. Use Thinner 304 for cleanup.

EquipmentAirless Spray: Use a 0.431mm to 0.533 mm (.017 to .021") tip size and 12 to 14 MPapressure.Conventional Spray: DeVilbiss JGA 502 GUN WITH "D" needle and fluid tip, 64aircap, or equivalent. Use 200-270 kPa pot pressure and 400 kPa atomising

pressure. Additional coats may be required for brush or roller application.Safety Precautions Recommended only for application by experienced industrial operators in industrial

coating operations. When applying by brush or roller, provide adequate ventilation.When applying by spray, users must comply with relevant spray painting regulationsand wear appropriate respirator to avoid inhaling vapours and spray mist. MaterialSafety Data Sheet is available and should be consulted.

Technical information given verbally or in writing is based on knowledge and research, given in good faith and believed to be reliable, but noguarantee of accuracy is made or implied. Since methods and conditions of use are beyond our control, all merchandise is sold and received subjectto the condition that our liability whether express or implied for any defect in quality, or for any lack of fitness for the specified use thereof, is limited tothe return of the purchase price if written claim is made within 14 days from date of delivery. It is recommended that the user makes his or her owntests to determine the suitability of the product for his own requirements. Freedom from patent restrictions is not implied.

PPG INDUSTRIES PTY. LTD. McNaughton Road, Clayton VIC 3168 24 hr Emergency Telephone 1800 033111

Telephone: (03) 9263 6000, Customer service: 1300 659 666