Do TPE casters leave marks on wooden floors?

TPE casters generally do not leave marks on wooden floors. Instead, they protect the surface through their material properties. The core reasons for this can be analyzed from two perspectives: material composition and physical properties. However, there are a few special cases that should be avoided:

1. The Core Reason TPE Casters Do Not Leave Marks

No Leakables, Avoiding Chemical Staining

TPE (thermoplastic elastomer) is produced without the addition of vulcanizers (such as sulfur) and reinforcing agents (such as carbon black) commonly found in traditional rubber. The material is inherently pure and FDA-certified for environmental protection. It will not leach pigments, oils, or chemicals over long-term use. Some rubber casters (especially industrial-grade black rubber wheels) contain carbon black, which can transfer trace amounts of carbon black during rolling due to friction, leaving dark scratches or marks on light-colored wood floors. TPE casters, however, are completely immune to this problem. Even after prolonged use or frequent rolling, they won't stain the wood floor.

Elastic contact prevents physical scratches.

TPE material has a moderate softness (typically 60-80 Shore A hardness). When in contact with the wood floor, it provides a "flexible conformity" rather than the "rigid impact" of hard wheels (such as nylon or metal). This contact minimizes damage to the wood floor's finish due to friction. Even if tiny particles of dust adhere to the caster's surface, the elastic surface cushions the impact, preventing scratches caused by impurities like hard wheels. Furthermore, the TPE wheel body has no sharp edges or burrs, further reducing physical scratches.

2. A Few Potential Marking Risks to Avoid (Avoidable Through Operation)
Although TPE casters themselves do not mark, the following situations can indirectly cause marks on wooden floors and should be avoided:
External contaminants on the wheel surface: If TPE casters are used outdoors or in oily areas, the wheel surface may become contaminated with dirt, oil, or color pigment. Rolling them directly on wooden floors without cleaning can transfer contaminants to the floor surface. This is not a mark left by the TPE material itself and can be avoided by wiping the wheel surface with a damp cloth before entering indoors.
Long-term overload can cause floor marks: If TPE casters carry equipment that is too heavy (exceeding the load limit of the wooden floor), even if the casters themselves do not leave marks, the weight of the equipment may cause localized pressure and deformation on the wooden floor, resulting in permanent marks. This is a load-bearing issue. Ensure that the total weight of the equipment does not exceed the designed load capacity of the wooden floor (typically, household wooden floors can support approximately 200-300 kg per square meter). This is unrelated to the TPE caster material.

3. Conclusion: TPE Casters Are an Ideal Choice for Wood Floors
Overall, TPE casters, due to their chemical-free, flexible contact properties, leave no markings on wood floors and effectively protect the wood finish from scratches. They are ideal for use in homes and offices with wood floors (e.g., moving sofas, office chairs, and wooden filing cabinets). Compared to rubber casters, which are prone to marking, or hard plastic casters, which are easily scratched, TPE casters offer the optimal balance of "no marking" and "floor protection."