Part of the How to Apply Paver Sealer guide.
A sprayer filter protects the downstream equipment, but the wrong filter can create an application problem. Filtration must suit the sealer, the sprayer and the selected tip. Installing the finest available screen, removing a required filter or forcing unsuitable material through a clogged system can all undermine a controlled application.
Map every filter in the system
Identify the inlet screen, pump filter, gun filter and nozzle screen actually present. Different sprayers use different arrangements. Write down each component’s identification and check the equipment manual. Graco publishes tip-specific filter guidance for its airless systems; that is evidence that filter selection is a matched configuration, not a universal mesh number.
Ask the sealer supplier whether the product is suitable for that configuration. Added traction material, pigments or other permitted components may change the required method. Do not assume an additive will pass through the same filter or that filtering it out leaves the intended coating system intact.
Use symptoms to choose the next inspection
| Symptom | Question to answer |
|---|---|
| Flow weakens gradually | Is material accumulating at a filter or another restriction? |
| Flow returns after servicing, then fails again | What is repeatedly entering or forming in the flow path? |
| Pattern changes after an additive is introduced | Does the approved application setup accommodate that additive? |
| Screen or gasket deteriorates | Are the components chemically compatible with the product and cleanup method? |
Inspect under the pressure-relief procedure
Stop, isolate and depressurize the sprayer before opening filters or fittings. Follow the actual manual, including any stored-pressure precautions. Keep the removed material for inspection without handling it as though the SDS does not apply. Never probe a restriction while the equipment can discharge.
Record what the filter contains. Sand suggests contamination somewhere in staging or handling. Partially cured material suggests a different question about working time, cleaning or material condition. A recurring obstruction requires finding the source; cleaning the screen repeatedly is not a complete diagnosis.
Do not use filtering to repair questionable sealer
A coating that contains unexplained gel, flakes or an unexpected separation should be referred to the supplier. Straining out visible material does not prove that the remaining liquid still has the intended properties. This matters particularly when mixed material has exceeded its working window or an unknown storage history is involved.
If the product permits straining during normal preparation, use the specified procedure and suitable clean equipment. Distinguish this routine instruction from an improvised attempt to salvage damaged material. Keep the original container and lot information available for technical support.
Reassemble and prove the complete setup
Use the correct replacement screen, seals and orientation. Check the inlet, filter housing, hose, gun and tip together before returning to the paving. A filter service can change available flow, so repeat the pattern and measured application check. Confirm that no leaks or irregular discharge remain.
For a coating with an approved traction additive, document how the additive is maintained in distribution and how the application system avoids removing it. If the suppliers cannot confirm an appropriate spray setup, use an approved alternative method. Removing filtration to make an uncertain setup run is not a verified solution.
A useful filter-service record
Save the product, sprayer, tip, filter identifications, symptom, debris description and corrective action. Include a representative test result after service. The record should explain why the system is ready, not merely show that a screen was cleaned.
Consistent filtration helps only when the coating remains suitable, the equipment is matched and application is checked on the actual surface. Treat the filter as one part of that chain.
Frequently asked questions
Should I remove the filter if paver sealer keeps clogging it?
Do not remove required filtration as an improvised repair. Diagnose the source and confirm an approved product-and-equipment configuration.
Does filtering a partially cured sealer make it usable again?
No. Removing visible particles does not establish that the remaining coating is still suitable. Consult the product supplier.
Related guides
- Worn Paver Sealer Spray Nozzles: Diagnose a Changing Fan Before Recoating
- Choose a Roller Cover for Paver Sealer: Texture, Lint and Material Compatibility
- Changing products in a sealer sprayer
Technical reference
Graco: matching filters and guards to airless spray tips. Use the current instructions for the exact surface, product and equipment. The job workflows above are editorial guidance, not a substitute for product-specific specifications.
Get help with the exact surface and product
Share the surface type, existing sealer, product information and clear photographs with Paver Sealer Store. Call 813-308-9202 for help matching your preparation or sealing plan to the actual installation.
