Can I mix different types of tire sealant to achieve a custom blend, and if so, what are the potential benefits and drawbacks of doing so? Would combining a latex-based sealant with a polyurethane-based sealant, for example, result in a stronger and more durable seal, or would it compromise the performance of the sealant as a whole? Are there any specific ratios or proportions that would be recommended for mixing different types of sealant, and how would this impact the overall viscosity and flow characteristics of the sealant? Conversely, are there any types of sealant that should never be mixed together, due to incompatible chemical properties or other factors? What about the potential impact on the tire itself - could certain combinations of sealant cause damage or degradation to the tires rubber or other components over time? Are there any established protocols or guidelines for mixing and testing custom sealant blends, and if so, what are the key factors to consider when evaluating their effectiveness?