Anest Iwata WS-Primer(Filler)1.8 Primer Gun

The WS-PRIMER Filler is a dedicated spray gun from Anest Iwata, purpose-built for high-build primer (filler) applications. It’s engineered to handle thick, high-viscosity primer materials with precision, giving a high-quality, even lay-down while minimizing overuse of material and reducing the effort needed for sanding.

Key Features & Benefits

1. Split Nozzle™ Technology

   • The gun uses Iwata’s Split Nozzle™ System, which channels airflow through three separate slots.

   • This design improves atomisation even at lower pressures, producing their signature flat-oval fan pattern — ideal for consistent coverage and reduced material waste.

2. Self-Adjusting Needle Packing

   • The needle packing is designed to auto-adjust, which removes the guesswork when setting it up. Just tighten, and it calibrates itself.

   • This feature also helps reduce maintenance time and ensures a reliable seal.

3. Durable Air Valve Seat

   • The air valve seat is made from aluminium and sealed with a solvent-resistant O-ring, making it robust and long lasting.

   • This “bullet-proof” design resists over-tightening and holds up well to frequent use.

4. Optimised for Filler / High-Build Primer

   • Specifically configured to apply high-build fillers: this version is not just for thin surfacers but for “filler application.”

   • Helps achieve flat, even material lay-down, which leads to smoother surfaces and less effort sanding after cure.

   • According to Iwata: fewer abrasives are needed (less sanding) — saving on consumables.

5. Ergonomic & Maintenance-Friendly Design

   • Ergonomically shaped handle and trigger for painter comfort.

   • Easy to disassemble / clean: the manual provides clear steps for disassembling the air cap, fluid nozzle and needle.

   • Designed to minimize downtime during cleaning and part replacement.

6. Identification / Visual Cues

   • The filler version has distinctive black adjusters and air cap, which differentiates it from other WS-PRIMER variants (such as Wet-on-Wet).

7. Air / Pressure Specs (per filler-model data)

   • Recommended working pressure: 2.0 bar (≈ 29 psi)

   • Air consumption: ~ 370 Nl/min for the filler version.

   • Gravity-feed design: cup feeds material from the top.