You will also need a small brush (such as an artists painting brush) or a spatula (which can simply be a thin piece of plastic or card).
Step 1: Fold the wetsuit over at the point of the cut so that the cut opens up to reveal the two surfaces that need to be glued back together.
Step 2: Apply a thin, even layer of rubber cement glue to both surfaces. Continue to hold the cut open while the glue dries. Do not rejoin the surfaces while the glue is still wet or tacky.
Step 3: The glue will only take 1 to 3 minutes to dry (depending on room temperature and humidity). The glue looks glossy when wet. It will become matte when dry. Once it appears dry, then check it by gently touching the glue surface to check. It will feel only slightly tacky and will not stick to your finger.
Step 4: Flatten out the suit so that the two surfaces come together. The bond is instant.
Step 5: Pinch the two surfaces firmly together.
Note: the suit can be used in the water right away. However, the maximum bond is achieved over a period of 4 to 6 hours. Therefore, you should avoid putting any immediate pressure on to the repaired surface.
Thanks to Wetsuit Wearhouse