How to Seal River Rock
River rock is a beautiful stone which comes in a wide variety of colors, and can be used in many different applications from driveways to fireplaces.
In general, river rock is quite porous, and will need to be sealed when laid down and resealed every two to three years thereafter to protect the integrity of the surface and prevent staining and molding.
Clean and sanitize the rock. Mix a four-to-one mixture of water to bleach in a large bucket, and apply the solution liberally to the river rock surface with a paint brush or sponge. Wear rubber gloves throughout this process. Allow the mixture 30 minutes to soak into the rock, and then rinse completely with a garden hose. Leave the surface to dry for a minimum of two days.
Apply one coat of rock glaze sealant with a paint roller, following the manufacturer's instructions. Allow the sealer to dry thoroughly.
Apply a second light coat of the sealer once the first coat is dry. Allow the river rocks to dry and cure completely for at least 48 hours, or 72 hours for driveways.
Things You Will Need
- 1-gallon bleach
- Large bucket
- Paint brush or sponge
- Rubber gloves
- Garden hose
- Rock glaze sealant
- Paint roller
Do not "paint" the sealer on in a thick layer -- thinner is better.
Michael Cohen has been a technical writer since 2006. His areas of expertise include classical music and nonprofit management, and his work has been featured across a variety of media platforms. Cohen received his bachelor's degree from The New School in New York City.