Section 6. Application of act.
This act shall not apply to the following:
(1) Bulk lead, as normally used for the repair of cast iron pipe joints.
(2) Bar solder, as normally used in the construction and repair of sheet metal duct work.
(3) All solders not used in the plumbing industry which have automotive, electronic, industrial or other applications and which have specifications distinct from solders commonly used in plumbing systems.