Last time I replaced slide seals I bought it at a local RV repair facility. They had huge boxes of different sizes, styles,thickness', etc. Instead of using factory replacement seal material I bought Newmar seal material. It cost more, but was made much better.
2000 Winnebago Ultimate Freedom USQ40JD
, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"