Tar & Sap Remover
Don't waste your time on over-the-counter brands. They are designed to be ultra safe for the general public, so fall short when "full strength" is needed. Hi-Temp's Tar Remover is a professional strength formula. Pros demand products that perform, so you can count on it to do the job.
Apply on cool vinyl and rubber only, and do not rub for an extended period of time.