In SportBond bunkers the sand is placed directly onto our uniquely bonded base which is completely porous. Our researchers developed the ratios for mixing the polymer/pebble to maximise the porosity of the SportBond bunker liner layer. It is mixed rather than sprayed, giving it a consistent strength throughout. Water filters through the sand and into the SportBond layer where it is provided with the easiest path to the drainage, eliminating sand wash, soil erosion and flooding. This helps to keep bunkers player friendly all year round and also reduces the maintenance required which is a great benefit to golf clubs.