Sherwin Williams Macropoxy 646 Epoxy Primer Finish is a versatile high performance polyamide cured epoxy designed to fulfil the needs of both new construction and maintenance painting to steel, aluminium or galvanised steel.
Macropoxy 646 is best used as a primer finish for marine applications, pulp and paper mills, refineries, power plants, chemical plants, offshore platforms, tank exteriors, nuclear power plants, and water treatment plants. White colour is acceptable for immersion use for salt water and fresh water. Not acceptable for potable water. Tinting is not recommended for immersion service.
Prepare steel substrate to SSPC-SP10/NACE 2/Sa2½. Surface must be clean, dry, and in sound condition. Remove all oil, dust, grease, dirt, loose rust, and other foreign material to ensure adequate adhesion. Stripe coat all crevices, welds, and sharp angles to prevent early failure in these areas. When using spray application, use a 50% overlap with each pass of the gun to avoid holidays, bare areas, and pinholes. If necessary, cross spray at a right angle. Spreading rates are calculated on volume solids and do not include an application loss factor due to surface profi le, roughness or porosity of the surface, skill and technique of the applicator, method of application, various surface irregularities, material lost during mixing, spillage, overthinning, climatic conditions, and excessive film build. Excessive thinning of material can affect fi lm build, appearance, and adhesion. Do not mix previously mixed material with new. Do not apply the material beyond recommended pot life.
- Dry Film Thickness: 125 - 250 microns
- Theorectical Coverage: 5.8 - 2.9m2 per litre
- Drying Time: 2 hours at 25°C to touch, 8 hours - 1 year at 25°C to recoat
- Pot Life: 4 hours at 25°C
- Finish: Semi Gloss
- Available in a full range of colours
- Available in 20 Litres