Sherwin-Williams Magnalux 42SF is a 2-pack glass flake styrene free bisphenol polyester for steel surfaces prepared by abrasive blast cleaning. It is recommended for applications where styrene is not desirable or prohibited.

The product is approved to Norsok Rev 6 System 7A/7B. Magnalux 42SF can be used under immersion or in non-immersed applications.

Magnalux products must not be applied over any existing painted surface, or any substrate which contains copper or zinc compounds. This includes copper or zinc based paints, or metal sprayed surfaces.

Please note: This product is subject to a 14 day lead time upon ordering

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• Features & Benefits
• Endorsements
• Recommended Application Methods
• Product Characteristics
• Recommended Thickness
• Practical Application Rates
• Average Drying Times
• Application Equipment
• Recommended Systems
• Surface Preparation
• Application Conditions & Overcoating
• Additional Notes
• Health & Safety

Features & Benefits

• 2-pack glass flake styrene free bisphenol polyester
• For steel surfaces prepared by abrasive blast cleaning
• Recommended for applications where styrene is not desirable or prohibited
• Approved to Norsok Rev 6 System 7A/7B
• Recommended Use:
  • Immersion: Marine including splash zones, hydrocarbon, aqueous, corrosive chemical environments - maximum immersion temp 60°C
  • Non-Immersed: Aggressive atmospheric conditions, corrosive gas. Superstructures, heli-decks, structural steel etc
• Low VOC - < 50 gms/litre
• Magnalux products must not be applied over any existing painted surface, or any substrate which contains copper or zinc compounds. This includes copper or zinc based paints, or metal sprayed surfaces

Endorsements

• Approved to Norsok Rev 6 System 7A/7B

Recommended Application Methods

Application Method:

• Airless Spray
• Brush application is not recommended

Recommended Cleanser:

• No.13
• Product must not be thinned

Product Characteristics

*All vinyl / polyester resin systems are subject to monomer loss and material shrinkage during application and curing.

Mixing Ratio:

• 98:2 base to hardener
• Retarder (included) must be added when application temperature exceeds 15°C

Shelf Life:

• Base: 12 months
• Catalyst (Hardener): 6 months, stored at temperatures below 20°C, away from heat sources and out of direct sunlight
• Frequent temperature cycling will shorten storage life

Recommended Thickness

• For atmospheric service: 500-750 Microns
• For aqueous and marine immersion: 850-1250 microns
• For chemical service: 1250-2000 microns

Consult Sherwin-Williams technical support or Rawlins Paints' Technical Support Team on 0113 2455450 (option 2) or send a message to [email protected] for detailed specifications.

Practical Application Rates

* Maximum sag tolerance typically 1110μm wet (1000μm dry) by airless spray

Average Drying Times

• Touch Dry - 6 hours @ 20°C
• Service time / Full cure - 3 to 4 days @ 20°C

These figures are given as a guide only. Factors such as air movement and humidity must also be considered.

Application Equipment

Airless Spray: Graco King 45:1 or similar - all filters removed - Min 3/8” hose diameter.

Notes:

• 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
• Brush application is not recommended

Recommended Systems

Primer:

• For temperatures upto 85°C use Magnalux 42PP, for temperatures above 85°C use Magnalux 41VP

Overcoating:

• Overcoatable with itself or Magnalux 43VC

Surface Preparation

• Blast clean to Sa2½ ISO 8501-1:2007, surface profile in the range 75-125 microns
• Ensure surfaces to be coated are clean, dry and free from all surface contamination

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
• If application and curing temperatures fall below 5°C, full cure may not be obtained - post curing may be required for certain aggressive environments - see additional notes
• It is not advisable to apply polyester coatings when the air or substrate temperature exceeds 45°C, or the substrate temperature exceeds 55°C
• These conditions can introduce paint film formation defects such as dry spray, pinholing, bubbling etc
• For application outside these temperature limits it is recommended that advice is sought from Sherwin-Williams

Overcoating:

• It is important to observe maximum overcoating times and note these will vary substantially with climatic conditions
• Minimum, as soon as gel has occurred and whilst still tacky
• Maximum at 20°C is 72 hours
• Strong ultra-violet/sunlight will substantially reduce overcoating time
• Once maximum overcoating time has been reached, adhesion values attained by any subsequent coat will reduce dramatically
• Should this occur overcoating should be treated as a repair, with the coating flash blasted to provide a physical key
• Styrene cannot be used to reactivate the surface of this product and may impair adhesion
• Take care to avoid contamination before application of subsequent coats
• Ensure ventilation during cure

Additional Notes

• Drying times, curing times and pot life should be considered as a guide only
• For optimum immersion service normal full cure must be achieved, ie 72 hours at 20°C (post curing at 80-100°C will shorten the cure time to 3 hours and may be recommended for some aggressive environments)
• For immersion spark test at 5kv per 1.0mm dft and repair defects by overcoating with the specified dft of Magnalux 42SF
• The reaction between the base component and catalyst is highly exothermic
• Deviation from the recommended mixing ratio should not be undertaken without first consulting Sherwin-Williams
• The catalyst must be stored separately from the base, and from any other paint or chemical products, in accordance with the product safety data sheet
• The quoted pot lives are typical figures for a full 20 litre unit @ 2% catalyst level
• Should any thickening or lumps appear in the mixed product, this should be discarded and the equipment flushed through and cleaned immediately
• Reduction in catalyst level and/or volume of mixed product will extend the pot life
• Flushing of spray equipment is essential before any break in work, and is recommended at regular intervals throughout the application procedure
• Only mix units of Magnalux 42SF as they are required for immediate use
• Magnalux products should not be thinned with cleanser thinners or any other solvent
• Thinning will severely impair the curing mechanism and subsequent performance
• Thinning with normal paint solvent can lead to exothermic reaction and possible fire or explosion hazard
• Magnalux products must not be applied over any existing painted surface, or any substrate which contains copper or zinc compounds
• This includes copper or zinc based paints, or metal sprayed surfaces
• Numerical values quoted for physical data may vary slightly from batch to batch

Health & Safety

Consult the Safety Data Sheet for information on safe storage, handling and application of this product.

Please contact Rawlins Paints' Technical Support Team on 0113 2455450 (option 2) or send a message to [email protected] for more information.