Flamemaster CS 3247 Aircraft Windshield Sealant - AMS-3333

CS-3247 is a two part Polysulfide synthetic rubber sealing and setting compound formulated for use when setting or repairing windshields and transparencies of Glass, Acrylic or Polycarbonate in composite or metal frames. CS-3247 exhibits excellent resistance to crazing of Acrylic and Polycarbonate, both at room temperature and elevated temperature +160 F. Fillers used in CS-3247 impart excellent UV resistance. CS-3247 may be used to effect repairs on either Polythioether or conventional Polysulfide sealants.

CS-3247 cures at room temperature to a flexible resilient rubber with excellent adhesion to Acrylic, Polycarbonate, aluminum, magnesium, titanium, steel, and numerous other materials. The cured CS-3247 may be subjected to aircraft fuels, de-icer fluids, water and / or weathering.

SURFACE PREPARATION

To obtain good adhesion the surfaces must be dry and free of all traces of oil, wax, grease, dirt or other contamination. The solvent blend selected should address the contamination present on the substrate to receive the sealing compound. The solvent blend should not adversely effect the substrate to be cleaned The solvent blend should not leave a residue on the surface to which the sealing compound is to be applied.

MIXING INSTRUCTIONS

Prior to the mixing of any sealant material the user should refer to the Material Safety Data Sheet supplied by the manufacturer. Safety glasses should be worn at all times when mixing or dispensing sealants CS-3247 Parts A and B are carefully matched at time of manufacture to provide optimum performance during application and when cured. The container labels identify which Part A to use with which Part B.

When material is supplied in 50 gallon drums or 5 gallon pails to be utilized with a Graco Hydra-mate (or equal) proportioning and dispensing machine the mix -ratio by volume is 8.3 parts curing compound to 100 parts of the base compound. Prior to placing the curing agent pail on the dispensing equipment the curing agent should be stirred. The dispensing equipment manufacturer's recommendations for correct operation of the equipment should be followed.

When material is to be hand mixed a ratio (by weight) of 10 parts curing compound to 100 parts of the base compound is used. The material should be mixed in a clean container alternately scraping down the sides to insure dispersion of the curing agent, mix until a uniform color is obtained. As both part A and Part B are Black, thorough mixing should be employed to insure adequate dispersal of the curing compound. The part B curing compound should be stirred before weighing out the necessary amount.When the material is supplied in two component sectional plastic kits; the instructions printed on the kit package should be followed, instructions are provided for both manual and machine mixing.

APPLICATION INSTRUCTIONS

When utilizing CS-3247 for non structural bonding of metal to metal, Polycarbonate, glass, acrylic to metal apply a thin film of mixed material (0.010"""" to 0.025"""") to one of the surfaces to be bonded join surfaces with sufficient pressure to insure full contact and restrain the bonded materials until cured. CS-3247 may be injected into channels using a hand or pneumatic extrusion gun and the proper nozzle. Adhesion promoter may be required on Polycarbonate or Acrylic

CURE

Specified application and cure schedules are based on standard conditions of 75F (27C) and 50% RH; increased temperature and relative humidity will reduce the work life and accelerate the cure. Conversely, lower temperatures and relative humidity will extend the work life and retard the cure. The cure may be accelerated at temperatures not exceeding 140F (55C) , ( Note: for every 10-15 degree increase in temperature the application time is reduced by half; for every 10-15 degree drop in temperature it is doubled).