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• Features & Benefits
• Endorsements
• Recommended Application Methods
• Product Characteristics
• Recommended Topcoats
• Surface Preparation
• Application Conditions and Overcoating
• Application Equipment
• Additional Notes
• Health and Safety

Features & Benefits

• For Industrial Use Only
• Interior and Exterior Use
• Specified for use as a primer for structural steel on blast cleaned steel for internal and external environments
• May also be used as a high build intermediate coat as well as the final coat where a low sheen industrial & functional finish required
• Indefinitely overcoatable with epoxy systems
• Fast-Clad 7220 may be applied between 75 and 225 microns DFT in one coat depending on specification requirement
• Not for immersion service

Endorsements

• Meets the performance requirement of BS EN ISO12944-2:2017 (C5) as part of a three coat system

Recommended Application Methods

• Airless Spray
• Conventional Spray
• Brush
• Roller

Recommended Thinner:

• Sherwin-Williams No.2 Thinner (for thinning)
• Sherwin-Williams Cleanser/Thinner No.9 or Sherwin-Williams Cleanser/Thinner No.13 (for cleaning)

Product Characteristics

Flash Point:

• Base: 24°C
• Additive: 28°C

% Solids by Volume:

• 68 ± 2%

Pot Life:

• 5 hrs at 5°C
• 2 hrs at 15°C
• 1 hr at 23°C

Colour Availability:

• Light Grey
• Dark Grey (Made To Order)
• Red Oxide (Made To Order)
• White (Made To Order)

Recommended Thickness:

• Dry film thickness: 75 Microns
• Wet film thickness: 110 Microns
• Theoretical Coverage: 9.07m²/ltr

VOC:

• 255 gms/litre determined practically in accordance with UK Regulations PG6/23
• 283 gms/litre calculated from formulation to satisfy EC Solvent Emissions Directive
• 185 gms/kilo content by weight from formulation, to satisfy EC Solvent Emissions Directive

Practical Application Rates - Microns per coat:

• Airless/Conventional Spray
  • Dry: 75
  • Wet: 110

• Brush
  • Dry: 65
  • Wet: 96

• Roller
  • Dry: 60
  • Wet: 88

Recommended Topcoats

• Indefinitely overcoatable with epoxy systems provided the surfaces to be coated have been suitably cleaned
• Where a high degree of gloss and colour retention is required overcoat with Sherwin-Williams Acrolon 7300, Sherwin-Williams Acrolon C137V2, Sherwin-Williams Acrolon C237 or Sherwin-Williams Acrolon 1850 finishes
• In the case of recoating Fast Clad 7220 with these top coats after extended periods of time (without maximum stated limits) the following conditions shall be matched in the moment of the finish application:
  • 1. The previous coating has been applied at the recommended dry film thickness and in accordance with good painting practices. Is free from any application defects and the dry film is tightly adherent.
  • 2. The surface is free from all type of contaminants such as soluble salts, oily and greasy materials and any other visible contamination that can affect intercoat adhesion. Any detected contamination shall be cleaned by adequate methods prior to the finish application.
  • 3. Surface does not present burn marks or any type of defect caused by mechanical, chemical or other type of damage. All such damaged areas shall be repaired with the original coating system before applying the finish coat.
  • 4. If under direct sunlight exposure for long periods the surface shall be checked for degraded superficial layer that can affect intercoat adhesion. If such layer is observed it should be removed by means of water jetting, abrading, solvent cleaning or other method considered to be suitable.
  • If applying FIRETEX single pack intumescent PFP products please consult Technical Department on 0113 2455450 (option 2) or send a message to [email protected] for details for overcoating guidance
  • If applying alkyd systems consult Sherwin-Williams for advice on overcoating
  • These overcoating times refer to achievement of optimum adhesion @ 23°C and will vary with temperature

Surface Preparation

• Blast clean to Sa2½ BS EN ISO 8501-1:2007. Average surface profile in the range 50-75 microns
• Ensure surfaces to be coated are clean, dry and free from all surface contamination
• Manually prepared surfaces should be prepared to a minimum standard of St3 BS EN ISO 8501-1:2007 at the time of coating
• Application to such surfaces should be by brush or roller where the mechanical action will aid adhesion

Application Conditions and Overcoating

• This material should preferably be applied at temperatures in excess of 0ºC. Relative humidity should not exceed 90% and in these conditions good ventilation is essential
• Substrate temperature shall be at least 3ºC above the dew point and always above 0°C
• In order to achieve optimum water and chemical resistance, temperature needs to be maintained above 0ºC during curing
• If it is desired to overcoat outside the times stated on the data sheet, please seek advice from Rawlins Paints' Technical Support Team on 0113 2455450 (option 2) or send a message to [email protected] for more information

Application Equipment

Airless Spray - For dft applications between 75-125µ

• Nozzle Size : 0.33mm (13 thou) - 0.38mm (15 thou )
• Fan Angle : 40°
• Operating Pressure : 155kg/cm² (2200 psi)
• The airless spray details given above are intended as a guide only
• Details such as fluid hose length and diameter, paint temperature and substrate 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
• For further assistance please contact Rawlins Paints' Technical Support Team on 0113 2455450 (option 2) or send a message to [email protected] for more information

Conventional Spray

• Nozzle Size : 1.27mm (50 thou)
• Atomising Pressure: 2.8kg/cm² (40 psi)
• Fluid Pressure : 0.4kg/cm² (6 psi)
• The details of atomising pressure, fluid pressure and nozzle size are given as a guide
• It may be found that slight variations of pressure will provide optimum atomisation in some circumstances according to the set up in use
• Atomising air pressure depends on the air cap in use and the fluid pressure depends on the length of line and direction of feed i.e. horizontal or vertical
• For application by conventional spray, it may be necessary to thin the paint by the addition of up to 10% Cleanser/Thinner No.2
• Where thinning has been carried out the wet film thickness must be adjusted accordingly
• This product must only be thinned using recommended thinners
• The use of alternative thinners, particularly those containing ketones, can severely inhibit the curing properties of the coating

Brush & Roller

• The material is suitable for brush application
• Application of more than one coat may be necessary to give equivalent dry film thickness of a single spray applied coat

Additional Notes

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

Epoxy Coatings - Colour Stability:

• Fast-Clad 7220 is not colour stable and significant colour changes will be observed with time
• However, this does not affect the performance of the material
• 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
• At this temperature the pot life will be approximately halved
• 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

Health & Safety

• Consult Product Safety Data Sheet (see section above) for information on safe storage, handling and application of this product