This two-component fuselage sealant is a manganese-dioxide cured polysulfide polymer, designed for excellent adhesion and flexibility on various metal substrates. It resists aviation fuels and chemicals, features low viscosity for easy application, and can be cured faster with heat. Suitable for extrusion, injection, or roller coating techniques.
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Overview
Naftoseal® MC-630 Class C is a two-component, manganese-dioxide cured polysulfide polymer system providing excellent 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. Part number 50600243 has a minimum application time of 2 hours. Naftoseal® MC-630 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. Naftoseal® MC-630 Class C Techkits can be mixed by MCI-Mixer or by appropriate 2- component mixing and dosing systems. The mixed compound combines low viscosity, for ease of mixing, with a high thixotropy giving good applicational characteristics. It can be effectively applied by extrusion, injection gun or by using a roller coating technique. The low viscosity of MC-630 C means that it is easily squeezed from interfaying surfaces during the assembly process. MC-630 C has a unique self-filleting characteristic. The curing time may be reduced considerably by increasing the temperature (up to 60 °C / 140 °F max).
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