Sealers appear to be made from liquid raw latex mixed with something to balance the pH (ammonia?) of it will not corrode wheels and some particles to help seal. Of course there are other things, but these are the basics. The difference between the brands lies in the thickness of the seal and how much material is added to ensure a seal. At one end of the spectrum is Orange Seal - it's quite a thin liquid, like a light cream, whatever the particles are, they're really tiny, too small to see. The other end is Slime 2in1, which looks like torn paper and lots of it. It's thick and chunky, like salsa. Although this material is listed as suitable for bicycles, it is probably more suitable for tires on garden tractors, wheelbarrows, etc. It is too thick. Parts get stuck between the tire bead and rim preventing sealing, I always had leaks around the bead until I washed it and changed brands. Orange Seal works great, no complaints but this mikKit seems to be somewhere in between. It's thinner than an orange, but it has mixed fibers, and those fibers are very small. It still pours like a liquid, no lumps. There are black dots that can be worn by the tires. Small enough not to disturb the rim's seal, but just enough to plug large holes. Both bikes I used this on sealed instantly and stayed sealed at 100psi. A good sign is that the sealant that got on my fingers dried quickly and turned into a very sticky film, telling me it will stick the bead to the rim and hold it there.
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