Print Parameters
GluBoost Fill n' Finish Flexible Filler
GluBoost Fill n' Finish – Clear Surface Filler & Finisher for 3D Printed Parts
Transform rough 3D prints into smooth, professional-looking finished parts with GluBoost Fill n' Finish. Originally developed as a premium self-leveling filler and finishing solution, this flexible, water-clear formula is ideal for eliminating layer lines, filling surface imperfections, repairing print defects, and creating paint-ready surfaces on a wide range of 3D printed materials. The formula remains flexible after curing and resists shrinking, cracking, and witness lines for a cleaner final appearance.
Unlike traditional fillers that require extensive sanding and multiple applications, Fill n' Finish self-levels to create a smooth surface while filling gaps, seams, scratches, and print artifacts. Its long open time allows the material to flow into layer lines and surface imperfections before curing, helping reduce post-processing time while improving overall finish quality.
Perfect for PLA, PETG, ABS, ASA, and resin prints, Fill n' Finish can be used to:
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Fill visible layer lines on FDM prints
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Repair chips, cracks, and print defects
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Blend seams on multi-part assemblies
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Smooth cosplay props and display models
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Prepare prints for priming and painting
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Create high-gloss showcase finishes
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Improve appearance of functional prototypes and production parts
The crystal-clear, non-creeping formula stays where applied and dries with excellent clarity, making it ideal for both cosmetic and functional post-processing applications. Whether you're finishing a cosplay helmet, repairing a prototype, or preparing a display model for paint, Fill n' Finish helps deliver a cleaner, more professional result with fewer finishing steps.
Key Features
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Self-leveling formula minimizes sanding
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Fills layer lines, seams, and surface defects
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Flexible cured finish resists cracking
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Water-clear appearance
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Long working time for detailed finishing work
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Compatible with primers and paints
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Suitable for FDM and resin printed parts
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Excellent for cosplay, prototyping, fabrication, and model finishing
Recommended Applications
Layer line removal • Surface refinement • Print repair • Seam blending • Paint preparation • Cosplay finishing • Functional prototype finishing • Display model enhancement

