# Best Modeling Putty: Fill Seams and Gaps Like a Pro Source: https://modelbuildlab.com/best/best-modeling-putty Updated: 2026-09-14 Publisher: Model Build Lab. Our score is an editorial rating out of 10 (fit 35%, features 25%, build 20%, value 20%), not a customer rating. Method: https://modelbuildlab.com/how-we-research#our-score Modeling putty fills the seams, gaps, and sink marks that even good kits leave behind, giving scale modelers a smooth surface before primer. There are several families: solvent-based putties that bite into styrene, two-part epoxy putties for sculpting and big gaps, sprue-goo style mixes, and CA glue used with filler powder for fast, hard fills. Each behaves differently under a sanding stick. When choosing, consider shrinkage as the putty cures, how easily it sands and feathers into surrounding plastic, cure time, and whether it can be smoothed with solvent to reduce sanding. This guide covers putties for hairline seams, deep wing roots, and full-on sculpting work. ## Picks ### 1. Tamiya Epoxy Sculpting Putty Our score: 8.4/10 (Fit for the job 9/10 · Features and specs 8/10 · Build and materials 8/10 · Value 8/10) Tamiya Epoxy Sculpting Putty, a two-part filler for bigger gaps, rebuilding shapes and sculpting small details. Pros: - Epoxy cure means no shrinkage, even on larger gaps - Can be sculpted into missing parts or custom details - Smooths with water before curing for cleaner results Cons: - Mixing two parts adds a step compared with tube putty - Longer cure time delays sanding and painting Details: https://modelbuildlab.com/product/B000BMTGX4 ### 2. Tamiya White Putty 32 gram TAM87095 Our score: 8.1/10 (Fit for the job 9/10 · Features and specs 7/10 · Build and materials 8/10 · Value 8/10) Tamiya White Putty 32 gram TAM87095, a fine-grained white filler that suits light plastic and white-molded kits. Pros: - White color disappears under light paint and on white parts - Fine texture sands to a very smooth surface - 32 gram tube lasts through many seam filling jobs Cons: - Harder to see on white plastic when checking coverage - Shrinks on deep fills and may need reapplying Details: https://modelbuildlab.com/product/B000R9N5VU ### 3. Vallejo Plastic Putty 18 ml (0.6 fl.oz.) - White, Opaque, Consistent Finish Our score: 8.1/10 (Fit for the job 9/10 · Features and specs 7/10 · Build and materials 8/10 · Value 8/10) Vallejo Plastic Putty 18 ml, a white, opaque, water-based filler that gives a consistent finish on plastic seams. Pros: - Water-based formula has low odor and cleans up with water - Can be smoothed with a damp brush instead of heavy sanding - Opaque white finish hides seams well under primer Cons: - Softer than solvent putty, so it can be removed if overworked - 18 ml bottle is small if you fill large gaps often Details: https://modelbuildlab.com/product/B000TSBJEO ### 4. Deluxe Materials BD44 Perfect Plastic Putty, 40ml Our score: 8.1/10 (Fit for the job 9/10 · Features and specs 7/10 · Build and materials 8/10 · Value 8/10) Deluxe Materials BD44 Perfect Plastic Putty 40ml, a water-based filler designed for fast, smooth seam filling. Pros: - Excess wipes away with a damp cloth for tidy seam work - Water-based and low odor for indoor work spaces - 40ml tub is generous for regular filling tasks Cons: - Needs a sealed lid, since it dries out if left open - Not ideal for structural fills that must take stress Details: https://modelbuildlab.com/product/B0076LAVFK ### 5. Mr. Hobby P119 Mr. Dissolved Putty Our score: 7.8/10 (Fit for the job 8/10 · Features and specs 7/10 · Build and materials 8/10 · Value 8/10) Mr. Hobby P119 Mr. Dissolved Putty, a thinned liquid putty for filling fine scratches and hairline seams. Pros: - Thin consistency flows into hairline seams and scratches - Brush-on application is precise on delicate areas - Mr. Hobby formula blends smoothly with plastic surfaces Cons: - Too thin for filling larger gaps in a single pass - Solvent smell requires good ventilation while working Details: https://modelbuildlab.com/product/B00124SJS8 ### 6. The Army Painter, Green Stuff, 2 Part Modelling Clay 20 cm for Sculpting | Mouldable Model Putty Modelling Compound for Miniatures, Easy-to-Knead Green Putty Epoxy Clay for Sculpting Our score: 7.4/10 (Fit for the job 8/10 · Features and specs 7/10 · Build and materials 7/10 · Value 7/10) The Army Painter Green Stuff is a two-part epoxy putty that you mix from yellow and blue strands, aimed at filling seams and gaps and at sculpting small details on models and miniatures. Pros: - Two-part epoxy putty: mix yellow and blue in equal amounts, then shape it before it cures, which suits filling gaps and seams. - The listing says it can be sanded or shaved once cured, so seam repairs can be cleaned up to a smooth finish. - Also works for sculpting small parts and conversions, so one strip covers both gap filling and custom detail work. Cons: - It is an epoxy sculpting putty, not a ready-to-use tube filler like Tamiya Basic Putty, so you must mix it each time. - A 20 cm strip is a modest amount, and the listing gives no cure time or working time to plan around. Details: https://modelbuildlab.com/product/B001AE5ZQO ### 7. Testors Contour Putty, Modeling Putty, 5/8 Oz Tube Our score: 6.8/10 (Fit for the job 7/10 · Features and specs 6/10 · Build and materials 6/10 · Value 8/10) Testors Contour Putty in a 5/8 Oz tube, a widely available modeling putty for filling seams on plastic kits. Pros: - Easy to find at many hobby and craft stores - Tube format makes quick seam fills convenient - Budget friendly for builders who fill seams occasionally Cons: - Can dry out in the tube if not capped tightly - Rougher texture than premium fillers after sanding Details: https://modelbuildlab.com/product/B003V5DE0E As an Amazon Associate I earn from qualifying purchases.