Gtechniq Interior Cleaner - 500mlInterior Cleaner 500ml Why use Gtechniq Marine Interior Cleaner? The Gtechniq boat interior cleaner works in three ways. First, it contains a non harmful water based degreaser and surfactant that will remove dirt and grease from any surface. Second, it contains an additive that traps and absorbs odor causing substances. Third, it contains a strong anti bacterial agent that also repels dirt. Gtechniq Marine Interior Cleaner is a unique boat interior