PPG Sigma SigmaDur 550 H (formerly SigmaDur 568) is a two component, high solids, high build polyurethane gloss topcoat which can be applied directly to metal.
SigmaDur 550 H is part of the ISO 12944-6 system for steel C5-I high and offers good colour and gloss retention as well as good resistance to splash of mineral and vegetable oils, paraffin, aliphatic petroleum products and mild chemicals.
SigmaDur 550 H has no time window for recoating, so it can be recoated even after long atmospheric exposure and it cures at temperatures as low as -5C.
Drying and curing times can be significantly reduced using PPG 866M Accelerator.
It is available in most BS4800, RAL and NCS colours.
PPG Sigma SigmaCover 280 (formerly Amercoat 71TC, Amercoat 185 HS) is a two component general purpose epoxy primer for use on steel and non ferrous metals.
A polyamide cured epoxy primer, SigmaCover 280 provides excellent adhesion to steel, galvanised steel and non ferrous metals and can be overcoated with most alkyd, chlorinated rubber, vinyl, epoxy and two component polyurethane coatings.
The SigmaCover 280 primer system is suitable for ballast tanks, decks, topside, superstructure, hull and cargo oil tanks.
Cure at temperature -10C.
It comes in light grey, red brown or green yellow