Thermoplastic products such as vehicle cargo area liners, floor mats, recreational and playground equipment, cargo pallets, and wet area walking surfaces are provided with an antislip surface treatment. The antislip surface is made up of individual non-interconnected asperities of an antislip 
polymer material, which do not form a continuous film over the surface of the 
thermoplastic product. The 
thermoplastic product is especially made of 
high density polyethylene. The antislip 
polymer is preferably a thermoset 
polymer, and most particularly is a 
polyurea / 
isocyanate polymer. The antislip polymer is preferably applied by spraying, and then the product is 
heat treated at a temperature in the range from 100 to 200° F., or is thermoformed at a temperature in the range from 250 to 550° F. The antislip asperities are durably bonded onto the 
thermoplastic base material, and provide a significantly increased 
coefficient of friction. The asperity size, height, and 
hardness can be controlled by adjusting the 
processing conditions. The asperities may have an increased 
surface relief due to a so-called "moth effect" and an increased 
surface roughness due to cratering as a result of a so-called "
volcano effect" in the process using 
thermoforming.