Asbestos Stove Burner Pad / Hot Pad

Asbestos stove burner pads and hot pads were common household kitchen accessories manufactured from the 1920s through approximately 1980. These flat, typically round or rectangular pads were made from compressed or woven chrysotile asbestos, sometimes bonded to a metal mesh backing or sandwiched between thin metal sheets. They served two primary domestic purposes: as heat diffusers placed on gas or electric stove burners to distribute heat evenly for delicate cooking, and as trivets or hot pads placed on tables and countertops to protect surfaces from hot pots, pans, and dishes.

The burner pad was a fixture of twentieth-century domestic kitchens. Marketed under brands including Pro-Tex and Ballinol, these products were sold in hardware stores, department stores, and kitchen supply shops as affordable, practical kitchen accessories. They were typically displayed alongside other cooking utensils and carried no health warnings or asbestos labelling during most of their period of sale. The Smithsonian National Museum of American History holds examples of asbestos burner pads in its collections, documenting their place in American domestic material culture.

The pads came in various forms. Some were simple compressed asbestos discs, dense and rigid, designed to sit directly on a stove burner. Others featured a metal mesh or wire frame with asbestos woven or pressed into the grid. Table trivet versions were often mounted on small metal legs or incorporated into decorative metal frames. Despite their different forms, all relied on asbestos for their heat-resistant properties.

Asbestos burner pads are classified as friable because the compressed or woven asbestos construction is susceptible to surface degradation from repeated heating, cooling, and handling. Over time, the repeated thermal cycling and mechanical stress of being placed on and removed from burners caused the pad surface to deteriorate, becoming chalky, powdery, and prone to fibre release. Cleaning the pad, scrubbing food residue, or simply picking it up and putting it down released fibres into the kitchen environment where they could be inhaled by anyone present.

The domestic setting of these products is particularly concerning because they were used in enclosed kitchen spaces, often with limited ventilation, in close proximity to family members including children. A pad that was used multiple times per week for years represented a chronic, low-level exposure source within the home. Today, any asbestos burner pad found in a kitchen drawer, cupboard, or still in use should be carefully removed from service and disposed of as asbestos waste.