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4.155 GEMCOAT CR 1:1

CHEMICAL & ABRASION RESISTANT COATING

 

 

  • Composition and Properties

  • GEMREZ CR 1:1 is a two part , solvent free, chemical resistant epoxy resin.

  • It is formulated for use as a chemical resistant lining , and as a primer under GEMCOAT CR 1:1 chemical & abrasion resistant coating, and GEMCOAT CRT chemical & abrasion resistant topping.

  • It can be reinforced with binder free fibreglass.

  • It can be used for lining for concrete, steel, and fibreglass tanks, pumps, and secondary containment (bunds) exposed to chemical immersion and splash & spillage.

  • It is formulated to have resistance to most concentrated acids & alkalais, and other commonly used chemicals such as solvents etc. – consult with GemCo for suitabilty for use.

  • Two coats of GEMCOAT CR in are recommended over the top of GEMREZ CR 1:1 chemical resistant epoxy resin when reinforced with fiberglass, or when lining a pump subject to abrasion.

  • Physical properties

  • Appearance: Base – clear resin Hardener – clear resin

  • Odour: low odour Solids: 100 %

  • Coating Type: Epoxy

  • Packaging: 2, 8 litre , two part pack

  • Mix ratio: 1 part base :1 part hardener

  • Pot Life: 1/2 hour approximately at 20 degrees Celsius (100g mix)

  • Coverage: 5 sq metres/litre @ 200 microns DFT(theoretical - depends on substrate)

  • Dry hard Overnight to tack free; 7 days full cure before putting in service

  • Surface Preparation

  • All oil, grease , and other contaminants must be removed (GEMPREP 2000 is recommended).

  • Concrete: Must be minimum of 4 weeks old. Acid etch with 5% Hydrochloric acid, wash clean with water and allow to dry OR physically remove laitence by suitable means e.g. grinding, sweep blasting etc.

  • On previously painted concrete physically remove coating by suitable means e.g. grinding, sweep blasting etc.

  • Steel : Blast with a suitable abrasive to near white metal (SSPC 10/SA 2.5 standard).

  • If this is not possible remove loose material by mechanical cleaning or high pressure water blast until only tight rust is left.

  • Fibreglass: Abrade surface to give a good key.

  • All surfaces must be free of dust or other contaminants before applying

  • GEMREZ CR 1:1

  • Method of Application

  • Add 1 part hardner to 1 part base and thoroughly mix - a drill with a mixing blade is required.

  • In cold weather warming base & hardener in hot water will make mixing easier.

  • GEMREZ CR 1:1 is applied by brush , or roller in one coat - rolling is preferred method of application.

  • Recoat with GEMREZ CR1:1, GEMCOAT CR 1:1, or GEMCOAT CRT within 24 hours.

  • Allow system to cure 24 hours .If possible cure for a further 16 hours @ 50° C .

  • Allow 2 days minimum before putting into service – 7days is preferred.

  • Handling Precautions

  • Avoid contact with eyes and skin.

  • Do not ingest.

  • Use with adequate ventilation.

  • Protective clothing ,eye protection, and gloves should be worn.

  • Do not breathe vapor or spray.

  • Keep away from children.

1/3/98

 

63 Hewletts Rd, Mt Maunganui. P.O. Box 4274, Mt Maunganui South, New Zealand.

Phone +64 7 572 2411 Fax +64 7 572 2415 E-Mail info@gemco.net.nz

 Website: www.gemco.net.nz