SEALANT: KIT 100,MC 780 C-2,4CS, NAFTOSEAL,AIMS 04-05-014

Naftoseal® MC-780 Class C-2 is a two-component, manganese-dioxide cured polysulfide polymer system with reduced density providing excellent fuel tank and fuselage seals. It is designed for interfay surface sealing and wet riveting of fuselage components and has outstanding resistance to aviation gasoline and jet fuel, as well as resistance to the chemicals and petroleum products used in the aircraft industry. Additionally, it was developed for a service temperature between -55 °C (-67 °F) to +130 °C (+ 266 °F) and withstand a shortterm temperature of +182 °C (+360 °F). Naftoseal® MC-780 Class C maintains its flexibility and bond strength on most metal substrates like aluminum, stainless steel, steel, titanium, composite and many coatings under extremes of temperature, weathering and stress. Part number 50571063 has a minimum application time of 2 hours.
Naftoseal® MC-780 Class C can be mixed by MCI-Mixer or by appropriate 2-component mixing and dosing systems. Naftoseal MC-780 Class C combines low viscosity, for ease of mixing, with a high thixotropy giving good application characteristics. It can be effectively applied by extrusion, by injection gun, or by using a roller coating technique. The low viscosity means that it is easily squeezed from interfaying surfaces during the assembly process. It has a unique self-filleting characteristic. The curing time may be reduced considerably by increasing the temperature (up to 60°C or 140°F max).

Typical physical and application properties:

	BASE	HARDENER
Colour	Beige	Brown
Viscosity at 23 °C, Brookfield RV, Spindel 7	Spindel 6 (for C-1/3 + C-2), all others spindel 7, 10 rpm 250 Pa•s. max.	Spindel 7, 10 rpm 400 Pa•s. max
Mixing ratio by weight	100	10
Mixing ratio by volume	100	7,26