SEALANT: KIT 100,MC 780 B-4,24CS, NAFTOSEAL,AIMS 04-05-014

Naftoseal® MC-780 Class B is a two-component, manganese-dioxide cured polysulfide polymer system with low density providing excellent fuel tank and fuselage seals. It 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 short-term temperature of +182 °C (+360 °F). Part number 50600257 has a minimum application time of 4 hours.
Naftoseal® MC-780 Class B 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.
Naftoseal® MC-780 Class B can be mixed by MCI-Mixer or by appropriate 2-component mixing and dosing systems. The mixed compound is a thixotropic paste easily applied by extrusion, injection gun or spatula. It has excellent tooling properties.
For a good surface finish Naftosmooth® can be used after application. 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	Grey	Brown
Viscosity at 23 °C, Brookfield RV, Spindel 7	1.000 (+-) 400 Pa.s (B-1) 1.400 (+-) 400 Pa.s (B-1/4, B-1/2, B-2, B-4) (2 rpm)	400 Pa.s max. (10 rpm)
Mixing ratio by weight:	100	10 (B-1/2, B-1, B-2, B-4) 14 (B-1/4)
Mixing ratio by volume	100	6,2
Non-volatile content		(>=) 94% (B-1) (>=) 97% (B-1/4, B-1/2, B-2, B-4)