A simple examination of your chimney crown can prevent all this expensive damage. Even if you avoid intrusion of water into your home, the crown itself will continue to deteriorate over time without easy and inexpensive preventive maintenance. Little cracks become much larger ones as moisture freezes in them and drives their sides apart. Eventually the crown will become so crumbly that it needs to be re-built or replaced. More money flying away…
If you see larger cracks up to one inch wide, or chunks of concrete broken off the crown, use CrownSeal instead. This too is formulated for use by professional chimney repairmen. This thicker product is applied with a trowel, so you can push the material down into the cracks. If pieces of the crown are crumbling or broken off, use a wire brush to remove loose material and then re-build with CrownSeal. You can also use CrownSeal to contour your crown so water will drain off the crown toward its sides. Once finished, your crown will be water-repellent for at least the duration of the 10 year warranty.
The materials in this restoration application are very simular to the materials in composite fillings, using a combination of resin and glass or quartz. The great advantage to indirect composites is that they are not excessively wearing on opposing teeth. Their durability is not as good as porcelain or metal restorations, though, and while they are improving with wider use, they are a little more easily discolored and prone to wear.