Article # 2504
Q: Which is more critical when selecting a coated glove, degradation or permeation?
A: When referring to a chemical resistance chart, you should definitely consider BOTH ratings. The rating language may vary between manufacturers, but here is a general outline of what each rating means:
• Indicates how glove coatings are affected by various chemical/contaminants
• Estimates how that coating will be affected to the point that the physical properties no longer provide liquid proof protection. Examples of this include cracking, peeling, blistering or swelling.
• Measures the permeation of a chemical or contaminant through the coating--which could happen with or without degradation.
• Accounts for the gas or vapor associated with a chemical, which may penetrate the coating unnoticed, and not appear or feel wet.
• Measured in breakthrough time, the time it takes the chemical to "seep" through a coating.
As you can see, when selecting the proper glove, it is important to evaluate both ratings to ensure the safest, most comfortable and most applicable product for your specific use.