How to Choose and Use Epoxy Putty for Doll Repairs
By Dollfie — VOLKS USA, INC. | Published: 2026-10-18
Category: How-to Guides
Learn how to select and apply epoxy putty for fixing dolls, garage kits, and models. Step-by-step guidance from surface prep to curing.
Quick Answer
Epoxy putty is a two-part resin that hardens into a durable, sandable material ideal for repairing cracks, filling gaps, and rebuilding broken parts on dolls and resin garage kits. For best results, choose a fine-grain putty, work in thin layers, and let each layer cure fully before sanding or painting.
What to Look for in an Epoxy Putty
Not all epoxy putties are the same. For doll and model repairs, you want a putty that cures to a hard but sandable finish, has minimal shrinkage, and bonds well to resin, ABS plastic, and vinyl. Fine-grain formulas are easier to sand smooth without leaving pits, which matters when you're restoring a face or limb seam. Avoid quick-setting putties (under 5 minutes) for detailed work — they harden before you can shape them properly. A working time of 15 to 30 minutes gives you room to sculpt and blend edges.
Surface preparation is critical. Before applying any putty, clean the area thoroughly with a degreaser like ZM Cast Clean Spray to remove mold release agents, hand oils, or old adhesive residue. This step is often skipped, and it's the most common reason putty fails to adhere. Work in a well-ventilated area and wear gloves — uncured epoxy can irritate skin.
Mixing and Applying Epoxy Putty
Knead equal parts of the two components until the color is uniform — any streaks mean incomplete mixing and weak spots. Roll the putty into a thin log or sheet before pressing it into the crack or gap. For deep repairs, build up in layers no thicker than 3 mm (about 1/8 inch). Thicker blobs trap heat and can cure unevenly or crack. Use a silicone-tipped tool or a wet finger to smooth the surface before it sets. Water prevents sticking and helps you blend the putty into the surrounding material.
Shaping and Curing
Once the putty is firm but not fully hard (usually after 30–60 minutes), you can carve or sand it with fine-grit sandpaper (400–600 grit). Let it cure fully — typically 12 to 24 hours — before priming or painting. Rushing this step leads to soft spots that ruin your finish. After curing, clean the dust off with a soft brush or tack cloth, then prime with a hobby primer to check for any remaining imperfections.
Step-by-Step: Epoxy Putty Repair for Dolls and Models
- Clean the repair area: Wipe the surface with ZM Cast Clean Spray or isopropyl alcohol to remove grease, mold release, and dust. Let it dry completely. Skipping this step is the #1 cause of putty failure — even a fingerprint can prevent adhesion.
- Mix the putty thoroughly: Cut equal amounts of both parts, knead until the color is uniform with no streaks. Work quickly but carefully — you have about 15–20 minutes before it stiffens. Uneven mixing leaves soft spots that won't sand or paint well.
- Apply in thin layers: Press the putty into the crack or gap using a silicone tool or wet finger. Build up in layers no thicker than 3 mm. Let each layer set for 30 minutes before adding the next. Thick blobs generate heat and can crack as they cure — patience pays off.
- Shape and smooth before full cure: When the putty is firm but still slightly pliable (about 30–60 minutes), carve excess with a hobby knife or sand with 400-grit paper. Use water to keep the sandpaper from clogging. Shaping too early smears the putty; shaping too late requires heavy sanding that can damage surrounding material.
- Let cure fully, then sand and prime: Allow 12–24 hours for complete curing. Sand with 600–800 grit, clean dust, and apply a thin layer of hobby primer. Inspect for pinholes or uneven spots before painting. Priming reveals hidden flaws — fix them now rather than after your final paint coat.
Products That Help with Surface Prep and Display
- ZM Cast Clean Spray: The ZM Cast Clean Spray completely removes mold release agents from garage kits, hand oils from Super Dollfie's skin, and more. Proper surface preparation for painting starts with removing any oily residues from the resin. Using this spray before applying epoxy putty ensures the putty bonds directly to the clean resin or vinyl, preventing delamination and weak repairs.
- Simple Base for DD Stand: Includes: 1 Simple Base. Please use the Connector Joint, Base Disc and Screw Set included in the DD Stand or the Arm Set for DD Stand. After repairing a doll, a stable stand base keeps your work safe while the putty cures and prevents accidental drops that could undo your repair.
