MSDS
Material Safety Data Sheet # 385
Hercules Chemical Company Inc. 
111 South Street 
Passaic NJ 07055-7398 
Information Telephone: 1-800 221-9330 
Internet: www.herchem.com 
NFPA  
HMIS  
PPE  
Transport Symbol 
Preparation 1/6/11 
Revision Date 1/6/11 
Revision Number 0
HERCULES Block – MSDS # 385   Page 1 / 4
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1. PRODUCT AND COMPANY IDENTIFICATION 
Product Identity: Brush-on/Blue Block 
Intended Use: Thread sealant. 
Manufacturer:  Hercules Chemical Company, Inc.  Information Telephone: (800) 221-9330 
 111 South Street 
  Passaic, New Jersey 07055-7398    Internet: http://www.herchem.com 
Emergency Phone: CHEMTREC: (800) 424-9300 
MSDS Date of Preparation:  11/15/2010 
2. HAZARDS IDENTIFICATION 
Blue color paste with Alcohol odor. 
EMERGENCY OVERVIEW 
Inhalation may cause mild irritation of nose and throat. 
May cause mild skin irritation on prolonged contact. 
Ingestion: Slightly toxic. Ingestion of a large quantity may cause drowsiness and loss of consciousness, 
stomach cramps, pain, nausea, vomiting and diarrhea. Get medical attention. 
Inhalation: Inhalation may cause mild irritation of nose and throat. 
Eye: May cause mild irritation or discomfort. 
Skin: Prolonged contact may cause mild irritation to persons with existing skin conditions. 




