MSDS No: 603 Revision No: 003 Date: 05/05/97

MATERIAL SAFETY DATA SHEET HILTI, INC.: P.O. Box 21148 Tulsa, OK 74121 Ph: 1 800 879 6000 Emergency No.: 1 800 879 4444 PRODUCT NAME: CC 251 EP Part A DESCRIPTION: Epoxy resin INGREDIENTS AND EXPOSURE LIMITS INGREDIENTS: CAS NUMBER: PEL: TLV: STEL: Phenol-formaldehyde polymer, glycidyl ether 28064-14-4 NE NE NE Bisphenol F / epichlorohydrin epoxy resin 09003-36-5 NE NE NE PEL = OSHA Permissible Exposure Limit. TLV = ACGIH Threshold Limit Value. These are 8 hour time-weighted averages unless otherwise indicated by "C" (Ceiling) or "STEL" (Short Term Exposure Limit). NE = None Established. NA = Not Applicable. PHYSICAL DATA APPEARANCE AND ODOR: Low viscosity liquid. Slight odor. SPECIFIC GRAVITY: 1.2 BOILING POINT: 243 - 392°F VOC CONTENT: 0.0 lb/gal MELTING POINT: Not Determined pH: Not Determined VAPOR PRESSURE: Not Applicable VAPOR DENSITY: Not Applicable EVAPORATION RATE: Not Applicable SOLUBILITY IN WATER: Negligible FIRE AND EXPLOSION HAZARD DATA FLASH POINT: >200°F FLAMMABLE LIMITS: Not Applicable EXTINGUISHING MEDIA: Water, Water Fog, CO2, Dry Chemical, Foam SPECIAL FIRE FIGHTING PROCEDURES: A positive pressure NIOSH-approved self-contained breathing apparatus should be worn when fighting fires involving chemicals. UNUSUAL FIRE AND EXPLOSION HAZARDS: None known. Thermal decomposition products can be formed. REACTIVITY DATA STABILITY: Stable. INCOMPATIBILITY: Strong oxidizing agents, strong lewis acids or mineral acids. HAZARDOUS DECOMPOSITION PRODUCTS: CO2, acids, aldehydes. Reaction with some curing agents can generate large amounts of heat. HAZARDOUS POLYMERIZATION: Will not occur. CONDITIONS TO AVOID: Exposure to excessive heat or storage above 100°F will shorten the shelf life of this product. HEALTH HAZARD DATA KNOWN HAZARDS: Irritation. Can cause sensitization with repeated and prolonged contact. SIGNS AND SYMPTOMS OF EXPOSURE: Can cause eye and skin irritation. Corneal injury is not likely. Sensitized individuals can develop an allergic skin response, e.g. itchiness, redness, etc. CARCINOGENICITY: No ingredients are classified by IARC, NTP, or OSHA as known or potential carcinogens. PRIMARY ROUTES OF EXPOSURE: Dermal. Inhalation. MEDICAL CONDITIONS AGGRAVATED BY EXPOSURE: Eye, skin and respiratory conditions. EMERGENCY AND FIRST AID PROCEDURES EYES: Immediately flush with plenty of water. Call a physician. SKIN: Practice good hygiene i.e. Wash hands and any exposed skin during breaks and after work. Get medical attention if irritation persists. INHALATION: No first aid should be needed. If ill effects occur, move to fresh air. If symptoms persist, seek medical attention. INGESTION: Induce vomiting only if large amounts of material are ingested, otherwise do not induce vomiting. Consult a physician. OTHER: Referral to a physician is recommended if there is any question about the seriousness of the injury/ exposure. CONTROL MEASURES AND PERSONAL PROTECTIVE EQUIPMENT VENTILATION: General (i.e. natural or mechanically induced fresh air movements that maintain vapor concentrations below recommended exposure limits). EYE PROTECTION: Safety glasses with side shields recommended in most industrial settings. SKIN PROTECTION: Neoprene or rubber gloves recommended. Cotton gloves may be suitable. RESPIRATORY PROTECTION: Respiratory protection is not normally needed for this product. If air movement is inadequate to control vapors or if discomfort occurs, wear a NIOSH-approved respirator suitable for organic vapors. Refer also to the MSDS for CC 251 EP Part B (curing agent). PRECAUTIONS FOR SAFE HANDLING AND USE HANDLING AND STORING PRECAUTIONS: Store in a cool dry place. Keep from freezing. Reseal all partially used containers. Wash with soap and water before eating, drinking, smoking or using toilet facilities SPILL PROCEDURES: Remove with an absorbent such as clay and place in disposal containers. Wash area with water to remove residue. REGULATORY INFORMATION HAZARD COMMUNICATION: This Material Safety Data Sheet has been prepared in accordance with the federal OSHA Hazard Communication Standard. HMIS CODES: Health 1, Flammability 1, Reactivity 0, PPE B DOT SHIPPING INFO: Non-regulated TSCA INVENTORY STATUS: Chemical components listed on TSCA inventory. SARA TITLE III, SECTION 313: This product does not contain any ingredients subject to reporting under requirements of Section 313 of the Superfund Amendments and Reauthorization Act of 1986 and 40 CFR Part 372. WASTE DISPOSAL METHODS: Consult with regulatory agencies or corporate personnel for disposal methods that comply with local, state, and federal health and environmental regulations. HEALTH / SAFETY CONTACTS: Steve Gerrard (x6309) Jerry Metcalf (x6704) The information and recommendations contained herein are based upon data believed to be correct; however, no guarantee or warranty of any kind expressed or implied is made with respect to the information provided.

MSDS No: 604 Revision No: 003 Date: 05/05/97

MATERIAL SAFETY DATA SHEET HILTI, INC.: P.O. Box 21148 Tulsa, OK 74121 Ph: 1 800 879 6000 Emergency No.: 1 800 879 4444 PRODUCT NAME: CC 251 EP Part B DESCRIPTION: Amine hardener for epoxy resin INGREDIENTS AND EXPOSURE LIMITS INGREDIENTS: CAS NUMBER: PEL: TLV: STEL: Benzyl alcohol 100-51-6 NE NE NE Modified polyamine 694-83-7 NE NE NE PEL = OSHA Permissible Exposure Limit. TLV = ACGIH Threshold Limit Value. These are 8 hour time-weighted averages unless otherwise indicated by "C" (Ceiling) or "STEL" (Short Term Exposure Limit). NA = Not Applicable. NE = None Established. PHYSICAL DATA APPEARANCE AND ODOR: Clear amber liquid. Amine odor. SPECIFIC GRAVITY: 1.0 BOILING POINT: 401°F VOC CONTENT: None MELTING POINT: Not Determined pH: Not Determined VAPOR PRESSURE: Not Applicable VAPOR DENSITY: Not Determined EVAPORATION RATE: Not Applicable SOLUBILITY IN WATER: Negligible FIRE AND EXPLOSION HAZARD DATA FLASH POINT: >200°F FLAMMABLE LIMITS: Not Applicable EXTINGUISHING MEDIA: Water, Water Fog, CO2, Dry Chemical, Foam SPECIAL FIRE FIGHTING PROCEDURES: A self-contained breathing apparatus should be worn when fighting fires involving chemicals. UNUSUAL FIRE AND EXPLOSION HAZARDS: None known. Thermal decomposition products can be formed. See below. REACTIVITY DATA STABILITY: Stable. INCOMPATIBILITY: Strong oxidizing agents, mineral acids and epoxy resins in uncontrolled amounts. HAZARDOUS DECOMPOSITION PRODUCTS: CO, CO2, NOx HAZARDOUS POLYMERIZATION: Will not occur. CONDITIONS TO AVOID: Exposure to excessive heat, open flame, and all sources of ignition and sparks. Storage above 100°F will shorten the shelf life of this product. HEALTH HAZARD DATA KNOWN HAZARDS: Corrosive. Causes burns to the eyes and skin. CARCINOGENICITY: No ingredients are classified by IARC, NTP, or OSHA as known or potential carcinogens. PRIMARY ROUTES OF EXPOSURE: Dermal. Inhalation. SIGNS AND SYMPTOMS OF EXPOSURE: Contact: Can cause burns to the eyes and skin. Inhalation: Inhalation of high vapor concentrations can cause irritation to the respiratory tract. MEDICAL CONDITIONS AGGRAVATED BY EXPOSURE: Respiratory conditions or other allergic ailments. EMERGENCY AND FIRST AID PROCEDURES EYES: Immediately flush with plenty of water for at least 15 minutes. Call a physician. SKIN: Immediately wash with soap and water. Get medical attention if symptoms persists. Launder contaminated clothing before reuse. INHALATION: No first aid should be needed. If ill effects occur, move to fresh air. If symptoms persist, seek medical attention. INGESTION: Do not induce vomiting. Dilute by giving water or milk to drink if victim is conscious. Get immediate medical attention. OTHER: Referral to a physician is recommended if there is any question about the seriousness of the injury/ exposure. CONTROL MEASURES AND PERSONAL PROTECTIVE EQUIPMENT VENTILATION: Avoid breathing vapors. Ventilation must be sufficient to control vapors. EYE PROTECTION: Safety glasses with side shields recommended in most industrial settings. Goggles recommended while mixing. SKIN PROTECTION: Neoprene or rubber gloves recommended. RESPIRATORY PROTECTION: None normally required. A NIOSH-approved respirator suitable for organic vapors may be required in the absence of adequate ventilation to control vapor concentrations. PRECAUTIONS FOR SAFE HANDLING AND USE HANDLING AND STORING PRECAUTIONS: Store in a cool dry place. Keep from freezing. Avoid eye and skin contact. Avoid breathing vapors. Reseal partially used containers. Observe conditions of good industrial hygiene and safe working practices. Wash with soap and water before eating, drinking, smoking, or using toilet facilities. SPILL PROCEDURES: Avoid contact with material. Wear the appropriate safety equipment. Take up with clay or other absorbent and place in disposal containers. Wipe up excess residue. REGULATORY INFORMATION HAZARD COMMUNICATION: This Material Safety Data Sheet has been prepared in accordance with the federal OSHA Hazard Communication Standard. HMIS CODES: Health 3, Flammability 1, Reactivity 0, PPE B, Goggles DOT SHIPPING INFO: Corrosive liquid, n.o.s (contains 1,2-diaminocyclohexane), Class 8, UN 1760, PG III. TSCA INVENTORY STATUS: Chemical components listed on TSCA inventory. SARA TITLE III, SECTION 313: This product does not contain any ingredients subject to reporting under requirements of Section 313 of the Superfund Amendments and Reauthorization Act of 1986 and 40 CFR Part 372. WASTE DISPOSAL METHODS: Consult with regulatory agencies or corporate personnel for disposal methods that comply with local, state, and federal health and environmental regulations. HEALTH / SAFETY CONTACTS: Steve Gerrard (x6309) Jerry Metcalf (x6704) The information and recommendations contained herein are based upon data believed to be correct; however, no guarantee or warranty of any kind expressed or implied is made with respect to the information provided.

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