Northern Technologies Intl Q4 net sales down 1% YoY to $84.2mln.

• NTIC reports Q4 net sales of $84.2mln, down 1.0% YoY. • ZERUST industrial sales up 2.4% to $55.2mln. • ZERUST oil & gas sales down 20.7% to $7.3mln. • Natur-Tec product sales down 1.0% to $21.7mln. • NTIC China sales up 14.0% to $16.2mln. • Gross profit down 210 bps to 37.6%. • Joint venture operating income down 9.8% to $8.5mln. • Operating income down 67.3% to $2.6mln. • Net income down to $18,000 from $5.4mln.