How to Apply Water Slide Decals Without Silvering
By Fuwa Fuwa Land-Fuwa Fuwa Land | Published: 2026-10-17
Category: How-to Guides
Learn the correct steps to apply water slide decals on model kits and avoid the cloudy silvering effect. Use decal setting solutions and softeners for a painted-on look.
Quick Answer
To apply water slide decals without silvering, prepare a gloss-coated surface, use warm water for release, and apply a decal setting solution before positioning. A decal softener helps the decal conform to curved or textured areas, eliminating trapped air that causes the cloudy look.
Why Decal Silvering Happens
Silvering occurs when air becomes trapped under the decal film, creating a visible silver or white halo. This usually happens on matte or rough surfaces because the decal cannot fully adhere to the micro-texture. A gloss coat before decaling provides a smooth, non-porous base that lets the decal lie flat. If you are working with a kit that has a textured finish, consider applying a thin gloss clear coat first.
Tools You Will Need
You will need a shallow dish of lukewarm water, tweezers, a cotton swab or soft brush, a hobby knife, and a decal setting solution. A decal softener is optional but highly recommended for curved or panel-lined surfaces. For Gunpla builders, the Effect Wings RG 1/144 Epyon's Sturm und Drang Accessory set (product_id: 507869) includes third-party effect wings that benefit from careful decal application to maintain a clean look.
Preparing the Surface
Before applying any decal, ensure the model surface is clean and free of dust or oils. If you have already painted or topcoated the kit, lightly sand any rough spots with fine-grit sandpaper, then apply a gloss clear coat. Allow it to cure fully—usually 24 hours—before starting decal work. This step is the single most effective way to prevent silvering.
Step-by-Step Decal Application
- Step 1: Cut and Soak: Use a hobby knife or scissors to cut out the decal close to its edge. Place it in lukewarm water for 10–20 seconds until the decal loosens from the backing paper. Do not soak too long or the decal may slide off and curl. Test by gently nudging the decal with tweezers.
- Step 2: Apply Setting Solution: Brush a thin layer of decal setting solution onto the area where the decal will go. This solution softens the decal and helps it bond to the surface. Avoid flooding the area—too much liquid can cause the decal to float out of position.
- Step 3: Position the Decal: Slide the decal off the backing paper onto the wet surface using tweezers. Adjust its position while the solution is still wet. Gently press from the center outward with a damp cotton swab to push out air and excess liquid. If the decal wrinkles or folds, apply a drop of decal softener and let it sit for 30 seconds before smoothing again.
- Step 4: Seal with Topcoat: After the decal has dried completely (at least 12 hours), apply a clear topcoat—gloss, satin, or matte—to protect the decal and blend it into the surrounding surface. Skipping the topcoat leaves the decal vulnerable to peeling or scratching during handling.
Products That Help with Decal Application
- Bandai JOYACTIVA Mobile Suit Gundam Blind Box Vol. 1 Model Kit: The Bandai JOYACTIVA Mobile Suit Gundam Blind Box Vol. 1 Model Kit includes decals that require careful application to avoid silvering. If you are building a kit from this blind box series, following proper decal techniques ensures the small decals stay flat and clear, enhancing the final appearance.
