Can anyone recommend loon aquel floatant? Unlike Gink, it is made from hexamethyldisiloxane and silicon oil. Unlike Gink, which I find too viscous in winter and too mobile in summer, it is claimed to be of a consistent viscosity. Also Gink can leave a slick whereas loon claims it doesn't. If it is good, it would be dead easy to make your own, if you can get hold of hexamethyldisiloxane. Alternatively silicon oil and toluene may be just as good? Annoying as in my PhD I must have made gallons of the stuff, as it was the by product of many of my reactions! Smells nice too!