I know Jayco uses the Quad sealant on the sides, but Jayco themselves recently told me when I asked that they use the Dicor 501 on the roof, or 502, which is the same thing. I knew it looked and fealt like 501, but had to ask. As for the brake cleaner, never heard of that. I've always used mineral spirits or denatured alcohol per dicor, carefully, and it's always been fine. I've got all the correspondence saved for reference.
John and Rebecca Dickson
Emma-8 / Little John-5 / Iva-1+
2013 Ford F-350 Lariat FX4, CC LB PSD, DRW
2015 Jayco Jay Flight 28BHBE (#8)