…….needed just a small amount of sealer, but found the stores only stock the large 310kg tubes, meaning you would waste most of it? Well recently I noticed that some places are stocking half size tubes which are quite expensive. Though useful they are still wasteful.
Today I found this. About the size of a small tooth paste tube. It holds only 70 g and costs only £1 from Poundland. Ideal for fixing small leaks.