Here we show heavy biaxial tape but in most small boats we use lighter woven tape. We wet the fiberglass tape with epoxy resin. This resin is the same than the one used to make putty.
Epoxy resin looks and feel like thick paint.
It is made of two parts that you mix before use and you apply like paint with a roller or a brush. The resin will become hard and cure in a few hours. You can squeeze the air out with a special roller as shown here but a simple plastic squeegee works fine too. See our shop manual for details. This is how it should look when finished.