Likely Routes of Entry: None for copper and alloys in their natural solid form. Inhalation of metal particulate or elemental oxide fumes generated during welding, burning, grinding or machining may pose acute or chronic health effects. In finely divided form, skin contact may produce localized irritation and/or contact dermatitis. MATERIAL SAFETY DATA SHEET SEALAPEX (BASE AND CATALYST) Note: This MSDS was prepared in accordance with the requirements of the OSHA Hazard Communication Standard (29 CFR 1910.1200) and is to be used only for this product. The information in this MSDS is, to the best of our knowledge, believed to be accurate. 1 - IDENTIFICATION

MSDS for Q‐5 Copper Catalyst, page 7 of 11 Information on: Copper oxide The substance may cause damage to the liver after repeated ingestion of high doses, as shown in animal studies. The product has not been tested. The statement has been derived from substances/products of a similar structure or composition. MATERIAL SAFETY DATA SHEET SEALAPEX (BASE AND CATALYST) Note: This MSDS was prepared in accordance with the requirements of the OSHA Hazard Communication Standard (29 CFR 1910.1200) and is to be used only for this product. The information in this MSDS is, to the best of our knowledge, believed to be accurate. 1 - IDENTIFICATION