Why do you have to put sand on artificial grass?

There are two main technical reasons for putting sand in artificial grass:

1. To help the turf standing up better.

2. More importantly to hold the grass down with weight: Law of physics, the artificial grass carpet expands and contrasts at temperatures changes. Certain areas in the United States, the temperature difference between day and night can be dramatic, up to 30-40 degrees F. To prevent or minimize the artificial grass from moving, adding sands or other type of infills will help a great deal.

There are products on the market called themselves infill-free which is more a marketing approach than a practical statement, most of our products won't need sand infill to stand up nicely and resiliently, but the grass itself won't be able to manage the expansions and contractions well regardless.

There are also other reasons for adding infills such as antimicrobial which prevent germs from growing, and zeolite which have to neutralize the pet urine smells. A direct upgrade of regular sand will be green color coated sand which will be less visible and blends in well with the artificial grass than regular brown color sands, other than that, the green sand works the same as regular brown color silica sand.