Engineered Performance For over half a century, Hubbard-Hall, Inc. has been a trusted supplier of engineered specialty chemicals. Today our family of engineers introduces Metal Guard Spray Formula - a new product that demonstrates superior lubricity, penetration, and cleaning power. Hubbard-Hall Waterbury, CT (203) 756-5521 Fax (203) 756-9017 Sales Offices and Regional Warehouses Contact Us ...