Protecting the keel of your boat is very important. Many boaters worry about how the outside and inside of their boat looks but are unaware of what goes on underneath. If the keel of your boat is worn down to bare fiberglass or if you just want to do some preventive maintenance, then this article is for you!
If the gelcote has worn off of the keel, then the saltwater will start eating at the resin which keeps the fiberglass together. Over time, you will start to just see little fiberglass hairs exposed. That means there is no protection from water entering your hull. This doesn’t mean that you’re going to sink necessarily, but once the water starts building up under your floor, then the problems start.
Since all boats sit with the bow up and stern down, the water will always drain to the back. With nowhere to go, or if the water is not removed, it will begin the process of “trying to escape”. It will condensate, and go into anything it can. The wooden stringers, floor and transom are at risk at this point. For most people that either can’t see the problem or just didn’t know, there is a simple solution for this, installing a keel guard. If you install one before your keel is damaged, then pat yourself on the back. But if not, get your keel fixed and install one. You can also install a port hole access near the transom on the floor. At least an 8" one is advised. That way you can see if you’re ever getting any water buildup and be able to stick a wet vac hose in there to get it out. Also if there are any small holes ANYWHERE in your boat, you should fill them with a polyurethane silicone sealant, 3M and Boat Life make great sealants.
These are some small preventive maintenance tips you can do on your own to ensure a longer life for your boat. Over my past 24 years in the boat building and restoration business, I have replaced stringers, floors and transoms on several boats. You can buy a keel guard for $125-$250 (depending on size boat/length), read the instructions inside and apply it yourself. I