What is "rubberise"

Usage examples of "rubberise".

Now I could hear the slap of the waves against the flat rubberised gunnels.

He belted on his trench-coat, pulled his trilby well down, screwed the special silencer on to his Belgian automatic, and stuck the gun in his right-hand pocket, a rubberised torch in the other and two spare clips for the gun in an inside jacket pocket.