CrownCoat is premixed and can be used wherever a long lasting waterproof membrane is needed. Fill larger Category: ChimneySaver Tag: Crown Repair.Crown Rebuilding – Chimney Crown Repair – Chimney Crowns Central CT. Chimney Crown Repair in west hartford ct Our certified chimney sweep techs travel These step-by-step instructions prove how easy it is to repair a chimney hole and create a sloped crown in order to avoid water leakage. Cost. $ $ CHIMNEYRX Brushable Chimney Crown Repair, 1 Gallon - - Amazon.com. I followed all the instructions minus duct taping as I didn't need to. The product Cracks and spalling in a brick chimney can get worse fast, but the fix is easy if you A cracked chimney crown or spalling bricks can easily cost $1,000 to repair. Stop water leaks and prevent chimney crown cracks with our trowelable crown repair. This product is meant for severely damaged crowns with large cracks.