Sherwin-Williams Macropoxy C123

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Sherwin-Williams Macropoxy C123 (formerly known as Epigrip C123) is a high solids, glass flake epoxy coating for the anti-corrosive protection of blast cleaned steel. Macropoxy C123 is especially suitable for steel structures, bridges and infrastructure in aggressive atmospheric conditions. Network Rail Item 7.2.3., Highways Agency Item No. 123.

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£69.85 tax excl.

£83.82   tax incl.
Available colours:

Product Description

Sherwin-Williams Macropoxy C123 (formerly known as Epigrip C123) is a high solids, glass flake epoxy coating for the anti-corrosive protection of blast cleaned steel. Macropoxy C123 is especially suitable for steel structures, bridges and infrastructure in aggressive atmospheric conditions.

Endorsements

  • Network Rail Item 7.2.3.
  • Highways Agency Item No. 123

Excellent Resistance to

  • Moisture
  • Aliphatic Solvents
  • Abrasion
  • Weather (subject to chalking)

Recommended Primers

Compatable with a wide range of Macropoxy, Zinc Clad Epoxy primers and buildcoats. 

Recommended Topcoats

Indefinitely self overcoatable provided the coating has been suitably cleaned. For optimum intercoat adhesion with other epoxy topcoats, overcoating should occur within 14 days. Where atmospheric exposure is required, overcoat with Acrolon C137V2 within 7 days at a minimum dft of 50 microns or in the case of Acrolon C750V2 overcoat within 4 days. These overcoating times refer to achievement of optimum adhesion at 23°C and will vary with temperature. For overcoating outside the above parameters and with alkyd systems, consult Rawlins Paints for advice.

Application Equipment

Airless Spray

  • Nozzle Size: 0.48-0.58mm (17-23 thou)
  • Fan Angle: 40°
  • Operating Pressure: 235kg/cm2 (3360 psi)

The airless spray details given above are intended as a guide only. Details such as fluid hose length and diameter, paint temperature and job shape and size all have an effect on the spray tip and operating pressure chosen. However, the operating pressure should be the lowest possible consistent with satisfactory atomisation. As conditions will vary from job to job, it is the applicators’ responsibility to ensure that the equipment in use has been set up to give the best results. If in doubt Sherwin-Williams should be consulted.

N.B. C123 is capable of being applied by brush at 250 microns dft as a stripecoat, or for touch up of small areas. 

Application Conditions & Overcoating

In conditions of high relative humidity ie 80-85%, good ventilation conditions are essential. Substrate temperature shall be at least 3°C above the dew point and always above 0°C.

At application temperatures below 10°C, drying and curing times will be significantly extended, and spraying characteristics may be impaired.

Application at ambient air temperatures below 5°C is not recommended.

In order to achieve optimum water and chemical resistance, temperature needs to be maintained above 10°C during curing.

If it is desired to overcoat outside the times stated on the data sheet, please seek advice.

Additional Notes

Drying times, curing times and pot life should be considered as a guide only.

The curing reaction of epoxies commences immediately the two components are mixed, and since the reaction is dependent on temperature, the curing time and pot life will be approximately halved by a 10°C increase in temperature and doubled by a 10°C decrease in temperature.

Epoxy Coatings – Colour Stability

Variable colour stability is a feature of epoxy materials which tend to yellow and darken with age whether used on internal or external areas. Therefore any areas touched-up and repaired with the same colour at a later date may be obvious due to this colour change. When epoxy materials are exposed to ultra-violet light a surface chalking effect will develop. This phenomenon results in loss of gloss and a fine powder coating at the surface which may give rise to colour variation depending on the aspect of the steelwork. This effect in no way detracts from the performance of the system.

Epoxy Coatings - Tropical Use

Epoxy paints at the time of mixing should not exceed a temperature of 35°C. Use of these products outside of the pot life may result in inferior adhesion properties even if the materials appear fit for application. Thinning the mixed product will not alleviate this problem.

The maximum air and substrate temperature for application is 50°C providing conditions allow satisfactory application and film formation. If the air and substrate temperatures exceed 50°C and epoxy coatings are applied under these conditions, paint film defects such as dry spray, bubbling and pinholing etc, can occur within the coating.

Numerical values quoted for physical data may vary slightly from batch to batch. 

It is your responsibility to read the Product Data Sheets (available below) before you place an order and prior to application of the product. The content of this website is our best recommendation and is not advice. Coverage rates quoted are approximate, you agree that coverage depends on the condition of the substrate, surface absorption, texture and application method. We ALWAYS recommend a trial area is coated to ensure the product meets your requirements before use.

Technical Data

Typical Coverage (per coat)2.1 - 3.3m² per litre
Touch Dry2.5 Hours
ApplicationBrush, Spray
The figures stated above are approximate. Please ensure you refer to all datasheets for full application information.

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Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.

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