To get the records in table2 that are not in table1, you can do the following:
SELECT tbl_2.ProductID, tbl_2.Product
FROM tbl_2 LEFT OUTER JOIN tbl_1
ON tbl_1.ProductID=tbl_2.ProductID
WHERE tbl_1.ProductID IS NULL
Regards,
SQL Server Helper
http://www.sql-server-helper.com