"Sno-Seal" would seem promising, but the more water repellent your lube is, the more water resistent your fouling will be.
I would have to look on the label. Lubes used where they are exposed to the flame and chemicals of BP combustion must be carefully chosen. Petroleum oils and greases can react with the fouling to form what is almost black concrete. But then Paraffin, American terminology, the wax, not kerosene, can be used as a stiffener in lubes with no apparent downside.
One of the best patch lubes I ever used was Sperm Whale oil and Beeswax mixed close to the old Sharps bullet lube/lube wad formula, perhaps just a little more oil to soften it a little.
I distrust water based lubes and wonder if this is not the source of breech erosion I keep hearing about. I have a 54 that has been shot exclusively with FFFG powder and oiled patches for years that I intend to bore scope at the breech for errosion. I don't believe it has any errosion.
I HAVE had problems years ago with rifles used with spit patches. Rings where the ball sets worn till they needed a bigger ball to shoot well etc.
A long time ML shooter I know was having what he thought was lube related problems and has gone to lard and it seems to have worked from him. I suspect that this is a pretty traditional lube as well. Probably cheaper than mink oil too.
I would also point out as I have in the past that I see little point in shooting 40-50 rounds without cleaning the gun. In the past this has resulted in "pre-ignition" of the powder charge when a spark was trapped in a mass of fouling in the breech. This has happened a few times at the NMLRA range at Friendship. Its rare true but it HAS happened and I will suffer the wiping to avoid the increased risk. The one that sticks in my mind was a shooter having the rod and ball go through his hand/wrist while loading a pistol. There was a more recent "event" on the shotgun range IIRC.
Dan