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  • Silca Silca, Elastomer Seal for Presta Chuck #242

Silca, Elastomer Seal for Presta Chuck #242

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Newly updated and improved the SILCA #242 gasket utilises a high tech, fully synthetic Elastomer base material rather than a black carbon-filled natural rubber of previous gaskets. With a life expectancy of more than 5 times the carbon-filled rubber or Buna-N materials used previously this unique, bright-red gasket boasts two-stage seal geometry which enforces closure on both valve stem and at the base of valve core threads resulting in improved durability and an air-tight seal in even the harshest of environments.
This replacement Silca Elastomer Seal for Presta Chucks slips onto the valve stem with a reassuring 'click', while unique internal geometry actually utilises line air-pressure to compress the gasket onto the valve stem: the higher you pump, the harder it grips the stem! Of course it won't come as any surprise to learn that more than 20 companies world-wide are making pump heads and gaskets copied from Silca's design, but none of them can come close to the precision and technology achieved with this genuine #242.

  • Replacement part for Silca floor and hand pumps/inflators
  • Comprises the finest, fully synthetic, Elastomeric materials
  • Achieves a durability of 5 times the traditional rubber materials
  • Newly optimised two-stage sealing geometry maximises performance on all Presta valve stems
  • Pressure amplifying dome geometry uses air-pressure to clamp valve stem
  • Works with 30.0/30.2 and 17-4 stainless steel "Presta Only" Chucks similar to the one pictured
  • Replaces previously available 24.1 gasket
  • Please check alternate image provided to see orientation of gasket
  • Fits all prior SILCA Presta heads
  • Made in USA

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