This silicone sealing gasket is supplied as an aftermarket replacement for ARRMA gearboxes, cut to fit the front and rear gearbox housings used on Kraton 6S EXB plus many related ARRMA 1/7–1/8 platforms. The 3M adhesive backing gives a stable, flexible hold that helps keep grease and oil inside the gearbox and away from bearings and adjacent drivetrain parts.
The gasket material and fit are selected for hobby-scale RC gearboxes with resistance to compression and aging so the gasket can be reused during routine maintenance. It is listed as a direct replacement for the original part ARA311190 and performs the same sealing function without altering gearbox components.
For tuning and long-run reliability, a correctly seated gasket retains lubrication on the spur and pinion interfaces and reduces contaminant contact with ball bearings, which can reduce maintenance intervals under heavy loads. The adhesive-backed strip speeds alignment during reassembly, but builders should still check gear mesh and bearing endplay before closing the gearbox.
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