Once a silicone Rubber keypad has been moulded and any additional painting processes of individual keys or key legends has been completed, an optional protective coating can be applied to increase the keypads resistance to abrasion.
Diamond HMI recommend that our customers coat all Keypads with either a Clear Polyurethane or Silicon lacquer. Both coatings can be applied in either matt or gloss finish and provide protection against wear of printed surfaces.
The additional cost of adding a coating is very low considering the benefits offered. If required, we can demonstrate the improvements by testing a sample of a customer keypad during the preproduction process.
Most customers choose the Polyurethane coating due to its extended life when compared to the silicon option. Polyurethane however, has a slightly different feel to that of Silicon due to its lower friction surface which translates to a different user experience.
Order our Free Silicone rubber keypad design tool.