sule 66Hhway Code Rule 66. Hhway Code > Rules for cyclists (rules 59 to 82) > Hhway Code Rule 66. You should. avoid any actions that could reduce your control of your cycle; be considerateSolvent 140 is one of the variants of mineral spirits classified under Rule 66. General Characteristics: Appearance: Clear, colorless liquid Chemical Composition: Hydrocarbon