Hydraulic anchor cements are becoming more popular and are a viable competitor with some epoxy products. Especially in any oversized hole this option needs to be explored. For more information visit, http://roadsandconcrete.com/?page_id=129. You will find some valuable information for consideration. As with all post installed anchor systems it is always advisable to properly clean the hole being filled. The Vortabrush is available in custom sizes if you have holes larger than 1 1/2″. Go to the “Contact Us” link found at Vortabrush.com for more information.