ProTXcoat 312CRX

Ultra Chemical Resistant Novolac Erosion

Ceramic Reinforced Chemical Resistant Novolac

312CRX is a high performance solvent free novolac coating reinforced with a blend of fine ceramic particles designed for use where exceptional resistance to chemical attack in combination with mild erosion/abrasion is required.

312CRX is based on a special epoxy novolac resin and a polyamine curing agent system which produces a highly cross linked polymer network. This unique system prevents permeation and subsequent attack of the coating by highly aggressive chemicals, allowing the system to be used whenever superior chemical resistance is required.

312CRX offers excellent adhesion to steel and concrete, has outstanding resistance to a wide range of industrial chemicals even under total immersion conditions and is ideal for tanks, pipework, containment dykes, bund areas, desulphurization units.

Before proceeding, please read the following information carefully to ensure that the correct application procedure is fully understood.


Steel Surfaces – Surfaces should then be abrasive blast cleaned to a minimum Sa21⁄2 – Sa3 BS7079 Part A1 : 1989 or equivalent with a blast profile of 75 – 125 microns corresponding to ‘Rough’ in ISO 8503/1. All loose abrasive dust and debris must be blown clear or vacuum cleaned away.

Steel surfaces do not require priming but should be coated within 4 hours of blast cleaning to prevent rash rusting.

Concrete Surfaces – All concrete to be coated should either be lightly abrasive blast cleaned using wet or dry abrasive techniques or alternatively high pressure water jetting. Care must be taken not to expose the aggregate in the concrete. All dust and abrasive material shall be removed from the surface prior to coating.

312CRX is a two component material comprising base and activator components which must be mixed together prior to use.

Stir the contents of the base component, continue stirring and gradually add the total contents of the activator container, stir the combined mix until completely homogenous.

The mixed materials should be used within 25-30 minutes of mixing at 20°C (68°F). This time will be reduced at higher temperatures and extended at lower temperatures.

312CRX Application should not be carried out at temperatures below 5°C nor when relative humidity exceeds 85% or when the surface to be coated is less than 3°C below the dew point.

Best application results are obtained at a minimum substrate and product temperature of 20oC. For optimum chemical resistance, the system must be applied and cured at a minimum temperature of 20oC for at least 7 days prior to return to service.

312CRX is suitable for application by brush or roller, using good quality brushes or short to medium pile rollers. Technology at work for you

Coverage Rate
• @350 Microns = 2.86 sqm per litre
• @400 Microns = 2.5 sqm per litre

Detailed working recommendations are available from the Technical Centre on request.

Mixing RatioBaseActivator
3.251 By volume
AppearanceBaseColored liquid
ActivatorAmber fluid
Drying & Cure Times at 20°C(68°F)Usable Life45 minutes
Initial Set8 hours
Min Overcoat8 hours
Max Overcoat24 hours
Volume Solids100%
Shelf LifeUse within 5 years of purchase. Store in original sealed containers at temperatures between 5°C (40°F) and 30°C (86°F).

Abrasion Resistance 60 mgm loss per 1000 cycles ASTM D 4060 -1 kg load-CS17 wheel

Dry Heat Resistance 240oC ASTM D2485

Water Vapor Permeability 4.69 x 10-6 ASTM D1653

Salt Fog Resistance Excellent, unaffected after ASTMB117 10,000hrs exposure

Humidity Resistance 5,000hrs exposure BS 3900 Part F2

As long as normal good practice is observed 312CRX can be safely used.

Protective gloves should be worn during use.

A fully detailed Safety Data Sheet is either included with the material or is available on request.

Supplied in 4ltr and 16ltr packs

The information provided in this Product Data Sheet is intended as general guide only and should not be used for specification purposes. The information is given in
good faith but we assume no responsibility for the use made of the product or this information because this is outside the control of the company. Users should determine the suitability of the product for their own particular purposes by their owntests.