Combustible 5 April 2021 This term means to ‘catch fire easily’. The more common term in the nail industry is flammable as many products used are classed as flammable. Related Articles: The Truth About Acetone: Essential, Efficient, and Often MisunderstoodIs Acetone Harmful for Removing Nail Coatings?Safe and Responsible Disposal of Acrylic LiquidWhat Are Solvents in Nail Products?The 3-Free Myth