Klaus is a master of the old school. He advises you to be careful when choosing the epoxy: "Cheap epoxy gets too hot and is not waterproof. Important: Do not mix the epoxy in containers that are too deep, because the higher the resin level, the faster it hardens and heats up. The mixing ratio must be calculated exactly. This can be done with a letter scale, or you can get two syringes from the pharmacy to measure the appropriate proportions." Klaus always uses cotton as a filler, as it stabilises optimally. Before fitting, the plugs should be sanded down thoroughly with rough sandpaper. The holes for the inserts are drilled with the sheet metal peel drill. Sheet metal peel drills are available for less than ten euros at DIY stores. The master craftsman's advice: "Fix the hole by first pre-drilling with a 6 mm drill bit, then it's easier to work with the peel drill." Another tip: "Mark the maximum drilling depth with tape on the peel drill so that you don't drill too deep." Then only fill the hole halfway with the mixed resin. Once the plugs have been fixed in the board and secured with a weight, such as a wooden board, the absolute professional trick is used: "Simply turn the board over. Advantage: The resin does not seep into the polystyrene gaps. It collects at the drilling point and ensures 100 per cent tightness."
The workshops "Retrofitting the luggage net" and "iSUP Boards: Sealing the seams" are also available as PDF downloads below.
