Surface Finish Options Overview
Product Description
MT-800 AM is a series of high durability powder coatings designed for exterior exposure. Tested against the most severe specifications MT-800 gives significantly improved gloss retention and resistance to colour change. MT-800 AM powders are available in a wide range of colours and gloss levels and can be custom matched to the user’s requirements.MT-800 AM is a high-quality powder coating designed to meet decorative and functional demands of your specifications. Test results have proven reduction of bacteria and mold up to 99.9%.
Powder Properties
| Chemical Type | Polyester TGIC |
| Particle Size | Suitable for electrostatic spray |
| Specific Gravity | 1.2-1.7 g/cm³ depending on colour and effect |
| Storage | Dry cool conditions below 25°C |
| Shelf Life | 12 months |
| Stoving Conditions (at object temperature) | 15 minutes at 190°C 10 minutes at 200°C 8 minutes at 210°C |
Mechanical Tests
| Adhesion (2mm Crosshatch) | ISO2409 | Gt 0 |
| Erichsen Cupping | ISO1520 | Depends on shade |
| Hardness (4000gms) | ISO 1518 | Pass – no penetration to substrate |
| Impact | BS6496 | Depends on shade |
| Flexibility (Conical Mandrel) | ISO6860 | Depends on shade |
Pre-treatment
For maximum protection it is essential to pretreat components for exterior use prior to the application of MT-800. Aluminium components should receive a full multi-stage chromate conversion coating to clean and condition the substrate. Detailed advice should be sought from the pretreatment supplier. Galvanised steel also requires multi-stage pretreatment using either zinc phosphate or chromate conversion. Degassing of galvanised steel prior to powder application is considered mandatory – follow the procedural advice of the pretreatment supplier. MT-800 products may also be used on other substrates (eg. mild steel fabrications) for internal applications; nevertheless zinc phosphate pretreatment is regarded as essential.
Application
MT-800 AM powders can be applied by manual or automatic electrostatic spray equipment. Unused powder can be reclaimed using suitable equipment and recycled through the coating system.
