I’ve finished planking the for and aft deck of my little build. This post shows two methods of adding the rubber between 1/2″ teak planks.
As you can see in the photo below, the method I have used here involves a great deal of sanding. There is no reason to spend the time masking perfect lines (as in this case) when there is a great deal of sanding to be done. You simply inject the “Teak Decking Systems” rubber into the gap filling as deep as possible, and then allow it to overfill. Finally, you trowel close to flat.
The more civilized method is to carefully mask each gap, inject until overfilling, trowel flat, allow to dry for 2 days. Use 100 grit sand paper on a random orbit sander until the tape starts to sand off also, then remove it.
As a note, I use an electric caulking gun to inject the rubber. The teak and rubber decking is pre-assembled on the workbench using a jig and sanded using a table-top sander before it is installed in the boat.
In both cases, I like to sand first with a belt sander (120 grit) and then follow up with a random orbit sander (100 grit.) If the teak is not for walking on, then finish with 220 grit.
Here is the finished laminates from the former post entitled “Clamps” and the sanded teak and rubber.