Contact dermatitis to anaerobic sealants

Area of Science:

• Occupational dermatology
• Polymer chemistry

Background:

• Anaerobic sealants, used since 1953 for metal assembly, are polymerizable chemical compounds.
• These sealants are widely used in industrial and mechanical applications.

Observation:

• A 60-year-old machine assembler developed hand contact dermatitis.
• The dermatitis was linked to exposure to specific Loctite sealant products (RC/601, 242, and 504).

Findings:

• Patch testing confirmed the patient's allergy to the sealant products.
• Positive reactions were observed for polyethylene glycol dimethacrylate, hydroxypropyl methacrylate, and hydroxyethyl methacrylate components.

Implications:

• This case highlights hydroxypropyl methacrylate as a sensitizer in anaerobic sealants.
• It underscores the potential for acrylic resins in sealants to cause occupational contact dermatitis.
• Further investigation into sealant components and occupational exposure is warranted.