Every one of our manhole covers come with many installation options. Also, they are all equipped with the bolt down option - to bolt down to your concrete pad or current riser. In addition, you can manually seal with Standartpark Canada’s professional silicone and polymer sealant to your existing pad. Then, you can pour or surround with your aggregate or concrete. Standartpark Canada is the only current manufacturer of road rated PPE 25 lbs plastic manhole covers, which is well-known to hold your vehicle. Please do not hesitate to contact us should you have any questions.