Surface defects like orange peel texture and cratering are among the most visible coating failures — and they are often misattributed to application error when the real root cause is the formulation's surface tension profile.
For automotive OEM, industrial metal, furniture, and consumer electronics coating applications, film surface quality directly determines product value and customer acceptance. When orange peel or cratering appears, the cost is not just rework — it is quality reputation. Solving these defects starts with understanding their chemistry-level root cause.
Orange Peel Texture
Fine, uniform waviness resembling orange skin. Caused by the wet film failing to flow out and self-level before viscosity increase locks the surface in place during solvent evaporation.
Cratering / Fisheye
Small circular depressions in the cured film. Caused by surface tension differentials — typically from contamination, silicone migration, or substrate energy incompatibility — pulling the wet film away from localized points.
Spray Texture Retention
Spray-applied coatings that fail to flow out between droplet impact and gelation retain surface topography from the spray process — producing a textured rather than smooth finish.
Target: Smooth, Defect-Free Film
Uniform surface tension profile across the wet film suppresses defect-driving convection currents and allows the coating to flow to uniform thickness before cure — delivering the clean, high-gloss finish end customers expect.
The root physics: Leveling defects arise from surface tension differentials (Marangoni flow) that create convection currents in the wet film, and from the rapid viscosity increase during solvent evaporation that locks in surface texture before leveling can occur. Modifying application parameters shifts timing but does not change the underlying formulation chemistry.
Surface Migration
DH-3187 migrates to the wet film surface during application and the early stages of solvent evaporation
Surface Tension Equalization
Creates a more uniform surface tension profile across the wet film — suppressing Marangoni convection currents
Enhanced Film Flow
Improves overall film mobility during the leveling window, allowing the coating to flow to uniform thickness
Defect-Free Cure
Film reaches uniform surface topography before viscosity sets — delivering consistently smooth, high-gloss results
Polyacrylate-Based | Silicone-Free | Solvent-Based Systems
DH-3187 is a polyacrylate-based surface flow and leveling additive engineered to overcome the chemistry-level root causes of orange peel and cratering. Unlike silicone-based leveling agents, DH-3187 does not impair intercoat adhesion or recoatability — making it the preferred choice for multi-coat industrial systems where topcoat performance is critical.
Orange Peel Reduction
Effective reduction of orange peel texture in both spray and roller applications across a range of film thicknesses
Cratering Suppression
Reduces fisheye and crater formation by minimizing surface tension differentials in the wet film
Silicone-Free Formula
Does not impair intercoat adhesion or recoatability — critical for multi-coat industrial and automotive systems
No Haze in Clear Coats
Compatible with clear coat formulations — does not cause haze or cloud formation in transparent systems
Color Flooding Reduction
Beneficial secondary effect on Bénard cell formation and color flooding in pigmented systems
Vertical Surface Control
Effective for vertical surface applications where flow-sag balance is critical
| Product | Chemical Basis | Compatible Systems | Application Method |
| DH-3187 | Polyacrylate copolymer | Solvent-based industrial, automotive topcoats, wood coatings, architectural coatings | Spray, roller application |
Key Takeaway
Orange peel and cratering are formulation-level problems that require a chemistry-level solution. Adjusting spray parameters alone cannot overcome an inadequate surface tension profile in the wet film. DH-3187 polyacrylate leveling agent addresses the root cause — improving surface flow, reducing defect-driving convection currents, and delivering consistently smooth, high-gloss film surfaces without compromising intercoat adhesion.
Need to Eliminate Orange Peel or Cratering from Your Coating Line?
Contact Suzhou Qingtian New Materials for technical data sheets and samples of DH-3187.