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Puretone Ltd are British manufacturers of quality hearing protection plugs, hearing aids, tinnitus management systems, in-ear monitors for musicians, earmoulds, swimplugs, and covert equipment for surveillance purposes. Suppliers of audiological, ERA equipment and accessories. Established since 1976.

Water-ShieldTM

Water-ShieldTM

Puretone Hydrophobic Protection



As part of the continual development and improvement program; Puretone have now installed new state-of-the-art equipment at the Rochester factory, applying a hydrophobic nano coating, called Water-ShieldTM.


The Water-ShieldTM bio-compatible coating is a highly durable “Teflon-like” amorphous carbon polymer coating that protects from accidental liquid exposure.


Tests have shown that a hydrophobic coating can reduce water ingress by 3x to 5x over an unprotected product, when exposed to simulated rain-chamber conditions.


Water-ShieldTM is created by the plasma decomposition of a vapor containing “Teflon-like” material. The resulting film is a cross-linked polymer which creates a hydrophobic “Nook and Cranny” seal, i.e. it prevents fluids from entering the small openings in portable electronic cases. It also permeates into the interior through any opening.


The Water-ShieldTM process is created at reduced pressures of deep outer-space, at an equivalent altitude of 200,000 ft above sea level, so that the carbon atoms can diffuse deep into the product, resulting in a hydrophobic coating over every exposed surface.


Water-ShieldTM is applied at nanometre film thickness, only about 1/2000th the thickness of an average human hair, and is completely invisible to the naked eye.


Additional Benefits:
  1. Greater protection from water
  2. Improves reliability
  3. More hygienic
  4. Increases device life

Please note: not all products to be included.

NOTE: AVOID contact with Alcohols & Solvents.
They will degrade the coating and the devices.

Registered Offices: Puretone Ltd, 9-10 Henley Business Park, Trident Close, Medway City Estate, Rochester, Kent. ME2 4FR. United Kingdom.
Company Registration Number: 1271080 (Incorporated in England & Wales)
VAT Reg Number: GB 293 7008 46

*Please Note* All calls are recorded for training purposes

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