Graco Throat Seal Liquid TSL 1 qt — prevents paint build-up and extends packing & piston life

When spraying paints and coatings, residue that dries on the displacement rod and throat packing shortens equipment life and causes leaks or performance drops. Graco’s TSL (Throat Seal Liquid) is formulated to reduce paint adhesion and keep moving parts functioning smoothly, cutting down maintenance time and replacement frequency for spray systems.

How does this throat seal liquid protect my sprayer during use?

The formula creates a thin, persistent film that resists paint bonding to the displacement rod and throat packing surfaces. By keeping these areas clean and movable, it helps maintain seal integrity and consistent spray performance over longer jobs.

• Reduces dried-on paint around the piston/displacement rod
• Minimizes friction and wear on throat packings
• Helps prevent small leaks that affect pressure and finish

How should I apply Graco throat seal liquid for best results?

Apply a light coating to the throat packing and displacement rod during routine maintenance or as recommended in your sprayer manual. Avoid over-application; a thin, even layer is enough to prevent paint adhesion without affecting spray chemistry.

• Wipe surfaces clean before applying to remove heavy buildup
• Use sparingly—reapply at service intervals or when you notice increased drag
• Follow equipment manufacturer guidelines for compatibility

Will using TSL extend the interval between repairs or packing replacements?

Regular use of a throat seal liquid can reduce the frequency of packing replacement by protecting the packing from abrasive and adhesive paint residues. While it doesn’t eliminate wear entirely, it noticeably extends component life when combined with proper cleaning and maintenance.

• Helps maintain smoother piston movement over time
• Delays hardening and deterioration of throat packings
• Reduces unplanned downtime for minor seal problems

Is Graco TSL compatible with different paints and spray systems?

Graco designed this throat seal liquid for use with its pump and spray equipment and common industrial coating formulations. Always verify compatibility with your specific paint type and consult Graco documentation for any restrictions or recommended practices.

• Works with many industry-standard coatings and solvents
• Intended for use on displacement rods and throat packing areas
• Check the product data sheet for detailed compatibility notes

Who is this for: Contractors, professional sprayers, and maintenance technicians who run airless or high-pressure spray systems and want to reduce downtime and consumable costs. Ideal for users seeking a simple maintenance product that protects piston rods and throat packings between service intervals and helps keep spray equipment delivering consistent results.