Quote:

The plastic sandwiched in the middle of these is undoubtably a common low-end compound - a polyethylene of sorts (hence the relatively low cost!). Unless you get into REALLY expensive, exotic compounds, most only have a continuous operating temperature of around 200*. That's why those few melted. On a race car they likely wouldn't be an issue but on a street car they'd eventually become heat soaked and subsequently melt.



Just finished checking mine,it had started melting. I do not have the heat crossover blocked. I know that made matters worse. Glad I saw this thread and checked,it was just before causing a problem. I bought it last year at the Nats from the guy selling them in the swap meet area. Not bashing anyone,just the way it was.