Flamemaster CS 3330 Access Door Sealant - MIL-S-8784B

CS 3330 is used as an access door sealant for integral fuel tanks and pressurized cabins, as a strippable fillet, and as a gasket for removable parts.

CS 3330 is a two-part, polysulfide compound designed to seal access areas where easy separation of joint surfaces is required. CS 3330 cures by a chemical reaction at room temperature to a firm, flexible rubber. Cured CS 3330 has low adhesion and forms a fuel resistant gasket that molds itself to fill all irregularities between two surfaces. Mixed, CS 3330 is a red thixotropic paste which is easily applied with an extrusion gun or spatula, but will not flow from vertical or overhead surfaces.

The cured sealant is resistant to aircraft fuels, lubricants, oils, water, and weather and remains flexible at low temperatures.

SURFACE PREPARATION

To obtain uniform adhesion, remove all traces of oil, wax, grease, dirt, and other contamination. This is done by wiping with a clean oil free solvent. Clean only small areas at one time and wipe dry with a clean cloth before the solvent evaporates. Maintain a clean solvent supply.

MIXING INSTRUCTIONS

When mixing pre-packaged kits, the entire contents of base compound and curing agent should be used. For small quantities, mix 100 parts by weight of base compound to 10 parts by weight of curing agent. Curing agent and base compound are carefully matched in production for optimum performance characteristics. Care should be taken to assure that the curing agent packaged with a given base compound isn't separated and used with a different base compound. The lip of the base compound container should be removed to facilitate mixing. Next, stir the curing agent in its original container until it is homogenous. Add the curing agent to the base compound and mix thoroughly seven to ten minutes or until uniform in color. Scrape sides and bottom of the container to assure a complete mix. CS 3330 CI may be mixed by hand or with a mechanical mixer. When using a mechanical mixer, use low speeds since high speeds will generate internal heat and reduce application life.

APPLICATION

CS 3330 CI may be applied with brush or roller within the specified application life. Specified applications lives are based on the standard condition of 77°F and 50% relative humidity. Higher temperatures will reduce the application life. Lower temperatures will extend application life.

CURE

The cure period is dependent on the application life, temperature, and relative humidity. Increased temperature and increased relative humidity will speed cure. Reduced temperature and reduced relative humidity will slow cure. Accelerate cureby heating up to 120 deg. F.