The MSDS (Material Safety Data Sheet) showing "rubber bar for car washing" could be a misnomer or a mistake in labeling or documentation. It's possible that:

Mislabeling: The document may have been incorrectly labeled as "rubber bar for car washing" instead of the correct product name, such as "clay bar for car detailing."

Confusion: There might have been confusion or an error in the documentation process, where the wrong product name was entered or printed on the MSDS.

Translation or Typographical Error: In some cases, if the document has been translated from another language, there could have been a mistranslation or typographical error in naming the product.

Generic MSDS Template: Sometimes, generic MSDS templates are used and may not be updated correctly to reflect the specific product being described.

If you encounter an MSDS labeled as "rubber bar for car washing" when expecting information about a clay bar for car detailing, it's important to verify the accuracy of the document with the manufacturer or supplier. Ensure that the MSDS corresponds to the actual product being used to ensure proper safety information and handling procedures are followed.