Silica sand it what you are looking for.
Should be fairly easy to find, as it's used for sand blasting (bone dry if stored properly and inexpensive).
Wear a breathing mask/cloth when pouring it as the dust is not something you want to inhail.
Perform the task outdoors.
Research silica sand for your application in order to judge the previous sandbox responses to your query.
Should be fairly easy to find, as it's used for sand blasting (bone dry if stored properly and inexpensive).
Wear a breathing mask/cloth when pouring it as the dust is not something you want to inhail.
Perform the task outdoors.
Research silica sand for your application in order to judge the previous sandbox responses to your query.