We have a product recommendation for your project needs:

Chimney Water-Based

8500 Concrete Sealer Bucket Image

A proprietary blend of silane & siloxane, this penetrating, water-based, concrete sealer prevents salt, chloride and freeze-thaw damage. Plus, its hydrophobic nature resists wind driven rain, moisture intrusion, mold and mildew. The benefits are endless but most importantly its high actives concentration allows it to outlast and outperform the competition - lasting upwards of ten years. Provides a flat, natural finish and creates a long-lasting water-repellent surface that beads water.