Author Info Authority ManagerGreenfield Township Municipal Authority greenfieldtownshippa.comProduct Tags: SealGuard Quote I have reordered twice since I started using SealGuard. It is nice that there is a product that can be used by in-house personnel without going to the expense of hiring outside contractors. The cost of manhole repair using SealGuard is a fraction of what I have spent in the past. The staff at SealGuard and Source One Environmental are friendly and responsive. Delivery of product is fast and help is there when you need it.