Thermal Spa (originally Mastex) was founded by the Mast family over 20 years ago as a manufacturer of health and spa electrical items such as the Ankle Booites, Heat Caps, Heat Mitts, and Massage Pads. Over the years, Mastex continued to expand its line of items to include items such as Paraffin Baths and Paraffin Waxes to grow its presence in both the Health and Spa Industry. Seeing opportunity and request for spa and health items in the beauty industry, Mastex introduced its products under the Thermal Spa brand and started to target and focus on the beauty industry.  American International Industries purchased the Thermal Spa brand in April 2010.

Thermal Spa believes in developing innovative and effective products to help keep estheticians and salon owners at the forefront of their profession.