VERSATILE AND SAFE FOR YOUR EQUIPMENT... ALL OF IT ! Greases with conventional refined petroleum based oils can affect and degrade plastic components. The fully synthetic oil base in HELIMAX-XP has been designed for use in service with plastic/plastic and plastic/metal contact parts and is compatible with most plastics and rubbers as well as all metal parts. And because of its superior lubricity HELIMAX-XP can also be effectively used with metal-metal contact components. HELIMAX-XP for HELICOIDS - OPTICAL INSTRUMENT GREASE & BRUSH HELIMAX-XP is an excellent choice for instruments where cleanliness is required. It is bright white and spreads virtually colourless.