Roof caulking identification

I have 2004 Lance 920 that I purchased new. The roof caulking/sealant that is exposed to the sun needs attention before the rainy season. The original caulking/sealant has turned a translucent orangish/brown. It is still pliable but badly cracked. About four years ago, I covered most of the caulked areas with EternaBond Roof Seal. The areas that I did not cover needs to be replaced. It appears to be a self-leveling lap sealant but the color has me stumped. It’s nearly impossible to remove with putty knife but add a heatgun and it turns into a tar-like goo that scrapes up and sticks to everything. The residue cleans up with Naptha or Mineral Spirits and a lot of elbow grease. Does anyone know what the original caulking/sealant is? (The Camper maintenance sticky did not help to identify the original sealant.)