Flame Master

CS3204B2 Fuel Tank Sealant

CS3204B2 Fuel Tank Sealant is a fuel resistant sealant for use on integral fuel tanks and pressurized cabins as well as other areas subject to contact with aircraft fuels, lubricants, oils, water and/or weathering.

CS3204B2 Fuel Tank Sealant is a two-part polysulfide base compound which cures at room temperature to a flexible, resilient rubber with excellent adhesion to aluminum, magnesium, titanium, steel, and numerous other materials. Designed to withstand the attack of sulfur compounds that are present in jet fuels, this thixotropic paste that will not flow or sag on vertical or overhead surfaces.

CS 3204 Parts A and B are carefully matched at the time of manufacture to provide optimum performance when cured. Care should be taken to assure that Parts A and B are combined as recommended on the container label. When mixing pre-measured kits do not thin CS3204 with solvents.

CURE: Specified application and cure schedules are based on the standard conditions of 77°F and 50% relative humidity.
Increased temperature and relative humidity will reduce the work life and speed up the cure while reduced temperatures and
relative humidity will extend the work life and slow the cure. Cure may be accelerated by heating up to 120°F. However
care must be exercised to avoid the entrapment of solvent when heat is applied.
Storage Life: 9 months when stored in the original unopened containers at temperatures below 80°F.  Some change in work life, viscosity and curing rate may occur during this period. However, such changes are slight and in no way affect the end performance of the product.
APPLICATION:  The work life of CS3204 is indicated by the number following the class designation and varies from 1/4 hour to 4 hours.
Work life is the minimum amount of time the material will maintain its application properties.
**1/4                    1/4 HOUR                          6 HOURS                      16 HOURS
½                          ½ HOUR                             8 HOURS                      30 HOURS
1                           1 HOUR                              15 HOURS                     40 HOURS
2                           2 HOURS                            24 HOURS                    72 HOURS
4                           4 HOURS                            36 HOURS                    90 HOURS
** CS 3204 Class B-1/4 may be fuel immersed within two hours of application when cured at standard conditions of 77mF ± 5% Relative Humidity.

Safety Precautions: Comply with all local safety, disposal and transportation regulations. Check the Safety Data Sheet (SDS) and label of the individual products carefully before using the products. SDS’s are available on request.

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Label Value
Specification meets AMS-S-8802 formerly Mil-S-8802F, Type II
*Ensure all required specifications are listed when requesting a quote or placing an order, as not all specifications are tested at the time of production.


Title File
Technical Data Sheet Download