Graco Throat Seal 8oz is a specially formulated lubricant designed for use with Graco airless paint sprayers. It provides long-lasting protection to the pump rod and cylinder, reducing friction and wear for smoother and more efficient operation. The throat seal is easy to apply, and its unique formula is designed to withstand the high pressure and temperature conditions of paint spraying. It is recommended for use before storage to prevent corrosion and to prolong the life of the pump. The 8oz size is convenient for small jobs or occasional use.