Place of Origin:
Guangdong Province，China
Brand Name:
YATU GOODING
Certification:
MSDS, TDS
Model Number:
GD-30
GOODING GD-30 is a two-component primer surfacer system used with GD-31 Hardener for automotive repair and refinishing preparation. It is designed to sit between the prepared substrate and the final compatible color or clear coat system.
For body shops, the primer’s role is to help refine a repaired panel after filler sanding, improve the uniformity of repair transitions, and provide a sandable base before finishing. It is intended for stable, dry, hardened, and properly sanded surfaces—not as a replacement for correct metalwork, body filler application, cleaning, or sanding procedures.
Compared with premium-priced refinish systems, GD-30 is positioned as a cost-conscious option for workshops seeking a defined 2K application process. Compared with entry-level 1K primers or inconsistent solvent primers, it is designed for use as a crosslinked two-component undercoat system, subject to correct preparation and application.
After body filler has been cured and sanded, small pinholes, fine scratches, and shallow transition marks may still be visible. GD-30 is intended to build a sandable primer layer that helps the operator refine these remaining minor defects before applying finishing coats.
A properly applied and evenly sanded primer surfacer can help provide a more consistent substrate for compatible basecoat, direct-gloss topcoat, or clear coat systems. Final gloss, color appearance, and surface fullness depend on the complete paint process.
The stated sanding reference is approximately:
| Curing Condition | Approximate Time Before Sanding |
|---|---|
| 15°C air drying | 3 hours |
| 23°C air drying | 2 hours |
| 60°C baking | 30 minutes |
This may support scheduling in repair facilities with controlled drying or baking capacity. Confirm actual curing before sanding.
GD-30 is applied in 2–3 coats with a recommended film thickness of 40–60 μm. Following the stated flash-off time can help support a controlled coating process and avoid excessively wet film build.
| Ambient Temperature | Recommended Reducer |
|---|---|
| Below 25°C | G-1 Reducer |
| 25°C and above | G-2 or G-3 Reducer |
Actual reducer selection should consider the real panel temperature, booth ventilation, humidity, spray speed, equipment, and the workshop’s validated process.
GOODING GD-30 is intended for automotive refinishing work involving:
Remove failed paint, loose material, grease, wax, silicone, dust, and moisture before application.
| Component | Parts |
|---|---|
| GD-30 Primer Surfacer | 4 |
| GD-31 Hardener | 1 |
| Reducer | 1.5–2 |
Mixing ratio by weight: 4 : 1 : 1.5–2
| Component | Parts |
|---|---|
| GD-30 Primer Surfacer | 3 |
| GD-31 Hardener | 1 |
| Reducer | 1.5–2 |
Mixing ratio by volume: 3 : 1 : 1.5–2
Use clean measuring equipment. Mix the material thoroughly until uniform. Do not use unmeasured proportions.
Clean and Prepare the Surface
The substrate must be dry, hardened, stable, and properly sanded. Use a professional degreaser to remove wax, grease, oil, silicone, and other contaminants. Remove sanding dust before spraying.
Mix GD-30 with GD-31 Hardener and the selected G-series reducer. At 23°C, set spray viscosity to 20–24 seconds with a Ford Cup No. 4.
| Item | Recommended Setting |
|---|---|
| Spray Gun | RP spray gun |
| Fluid Tip | 1.6 mm |
| Air Pressure | 1.8–2.0 bar |
Actual settings may need adjustment for the specific gun model and local operating conditions.
Apply controlled, even coats with suitable overlap.
Avoid heavy wet coats and excessive one-pass film build.
If using a baking process, allow the panel to stand for 15–20 minutes before increasing temperature.
After the coating has reached suitable sanding condition, sand according to the next compatible finishing system. Clean the surface again before applying color coat or clear coat.
| Item | Specification |
|---|---|
| Product | GOODING GD-30 Primer Surfacer + GD-31 Hardener |
| Type | Multipurpose two-component primer surfacer |
| Intended Substrates | Sanded old paint, compatible primers, cured body filler |
| Mix by Weight | 4 : 1 : 1.5–2 |
| Mix by Volume | 3 : 1 : 1.5–2 |
| Spray Viscosity | 20–24 sec, Ford Cup No. 4, at 23°C |
| Spray Setup | RP gun, 1.6 mm, 1.8–2.0 bar |
| Application | 2–3 coats, 40–60 μm |
| Flash-Off | 5–10 min at 23°C |
| Sanding Time | 15°C: 3 h; 23°C: 2 h; 60°C: 30 min |
| GD-30 Packaging | 4 kg/can, 4 cans/carton |
| GD-30 Carton Size | 34.2 × 34.2 × 20.3 cm |
| GD-31 Packaging | 1 L/can |
| Storage | 5–35°C, original sealed container |
| Shelf Life | 2 years |
| Issue | Possible Cause | Recommended Action |
|---|---|---|
| Sandpaper clogs during sanding | Primer has not cured sufficiently | Extend drying time; verify panel temperature and film build |
| Fine defects remain visible | Defects are too deep for primer surfacer alone | Rework the repair area before recoating |
| Slow drying | Low temperature, wrong reducer, or heavy coats | Check reducer selection and use controlled coats |
| Adhesion concern | Contamination or unstable old paint | Degrease thoroughly; remove failed coatings and sand correctly |
| Solvent popping or rough film | Coats were too wet or flash-off was too short | Reduce wet-film loading and observe 5–10 minute flash-off |
| Uneven topcoat appearance | Incomplete sanding or surface contamination | Sand uniformly and clean before topcoating |
What is GOODING GD-30 used for?
GD-30 is used as a sandable 2K primer surfacer in automotive repair and refinishing, before applying a compatible topcoat system.
Does GD-30 require GD-31 Hardener?
Yes. GD-30 is designed to be used with GD-31 Hardener according to the stated mixing ratio.
It is intended for stable, hardened, and sanded old paint films, compatible primer layers, and fully cured, sanded body filler.
By weight, mix GD-30 : GD-31 : Reducer at 4 : 1 : 1.5–2. By volume, use 3 : 1 : 1.5–2.
Use G-1 Reducer below 25°C. At 25°C or above, use G-2 or G-3 Reducer, subject to actual workshop conditions.
Apply 2–3 coats, targeting a recommended total film thickness of 40–60 μm.
The stated reference is about 3 hours at 15°C, 2 hours at 23°C, or 30 minutes after 60°C baking. Always verify that the actual coating has cured sufficiently.
It may be used only within a suitable plastic repair system after proper cleaning, preparation, and the required adhesion-promoting primer step. Confirm compatibility before regular production use.
Packaging
Storage
Store in original sealed containers at 5–35°C. Keep in a dry, ventilated area away from direct sunlight, heat, sparks, flames, and incompatible materials.
Shelf Life: 2 years under recommended sealed storage conditions.
Safety
This product contains organic solvents. Use in a properly ventilated spray area and wear suitable gloves, eye protection, protective clothing, and respiratory protection as required. Consult the relevant safety documentation before handling, storage, transportation, or disposal.
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