After modifying the fuel filler neck, the standard tank sealant had to be applied, as I had already done on my previous restorations. So far, I have always been very satisfied with the tank sealant from Ammon CREEM ROT. I first sealed my first tanks with CREEM ROT a good 17 years ago. The Minis equipped with the tanks are still in my possession. The sealant has so far shown no signs of decay or damage. So I have used it again for the Broadspeed tank.
In the first task the tank has to be degreased and in the second it has to be derusted. For both tasks there is a granulate which is mixed with water. The lye must then be left to soak for 20-30 minutes at a temperature of about 65°C. Since the mini-tank can't be filled to the top like on a motorbike, I had to do each task in several stages or positions to get all the corners in the end. That took me almost a day. To maintain the temperature, the manufacturer recommends an immersion heater (for motorbike tanks) I decided to use the gas grill

. After the degreasing and derusting, the tank has to dry completely from the inside. Two days later I did the coating. With my very first coating, I painstakingly covered the small filter with a plastic bag. I must have been lucky that this worked once. After that, I never managed it again

. But it works without it, as long as you only fill in a little more sealant than you really need. By swivelling, you let the sealant run into all the corners. With a little care, only the lower edge of the filter gets some sealant. However, this does not harm the subsequent fuel supply at all. Afterwards, excess sealant is sucked off with the syringe and the tank can dry for a few days
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