Place of Origin:
Guangdong Province，China
Brand Name:
GATE
Certification:
MSDS, TDS
Model Number:
LB-09
The LB-09 Automotive Undercoating Gun is a pneumatic suction-fed spray gun designed for applying high-viscosity automotive undercoatings, Body Schutz, stone chip coatings and similar textured protective materials.
Its approximately 250 mm long suction tube allows the gun to draw coating material directly from compatible 1–2 L threaded cans, reducing the need to transfer material into a separate spray cup.
With an approximately 2.0–2.5 mm nozzle passage and recommended working pressure of 0.2–0.3 MPa (2–3 bar), the LB-09 is designed for materials that require a larger material passage than conventional automotive paint spray guns.
The lightweight alloy gun body, direct suction design and adjustable spraying conditions make it suitable for automotive repair shops, bodyshops and workshops performing underbody protection and stone chip repair.
An automotive undercoating gun is a specialized pneumatic spray tool used to apply protective coatings to areas of a vehicle that are exposed to stone impact, moisture, road debris and everyday abrasion.
Unlike conventional automotive paint spray guns, which are optimized for fine atomization of primers, basecoats and clear coats, an undercoating gun is designed around the characteristics of thicker and textured protective coatings.
Typical materials include:
The LB-09 uses a suction-fed design so that coating can be drawn directly from a compatible threaded container.
The LB-09 includes a long metal suction tube that extends into the coating container.
Instead of:
Coating Can → Transfer to Cup → Connect Spray Gun → Spray
the working process can be simplified to:
Threaded Can → LB-09 → Spray Surface
This design can help reduce:
The approximately 250 mm suction tube is designed for direct material pickup from compatible 1–2 L threaded cans.
Container thread compatibility should be confirmed before purchase.
The LB-09 features an approximately 2.0–2.5 mm nozzle inner diameter, providing a material passage more suitable for thicker and textured coatings than a conventional fine-paint spray gun.
It is designed for applications involving materials such as:
Actual spraying performance depends on the coating's viscosity, solids content, particle size, temperature and material preparation.
The coating should be properly mixed and prepared according to its technical requirements before spraying.
Undercoating appearance is affected by several variables rather than the spray gun alone.
The operator can adjust:
to help achieve different coating textures.
For the LB-09, the recommended working pressure is approximately:
0.2–0.3 MPa / 2–3 bar
A practical starting point is around 2.5 bar, followed by test spraying on a scrap panel or suitable test surface.
Higher pressure does not necessarily produce a better texture. Excessive air pressure may increase overspray and alter the desired coating pattern.
For consistent results, keep the material condition, spray distance, air pressure and application technique as stable as possible.
The LB-09 uses an alloy gun body designed to balance durability and handling convenience.
Approximate weight:
0.285 kg
Approximate gun dimensions:
220 × 49 × 290 mm
The relatively lightweight body can make the gun easier to handle during localized underbody and body-panel protection work.
The long suction tube also helps reduce the need to repeatedly reposition or manually transfer coating material.
The LB-09 can be used for localized and general application of compatible automotive protective coatings.
Apply stone chip or underbody coatings to wheel arch areas exposed to road debris and water spray.
Suitable for restoring protective textured coatings on lower body areas.
Used for applying compatible undercoating and protective materials to selected underbody surfaces.
Suitable for localized coating of compatible chassis components where additional protective coating is required.
Can be used for textured protection on suitable inner body areas exposed to road debris.
Useful after body repair where an original textured protective layer needs to be restored or reapplied.
Step 1 — Surface Preparation
Remove dirt, grease, loose coating and other contaminants from the application area.
Step 2 — Repair the Substrate
Remove loose rust or damaged coating and complete any required body repair.
Step 3 — Mask Adjacent Areas
Protect areas that should not receive undercoating.
Step 4 — Prepare the Coating
Mix and homogenize the undercoating or stone chip material according to the coating manufacturer's instructions.
Step 5 — Connect the Gun
Insert the suction tube into the compatible threaded coating container and secure the container connection.
Step 6 — Connect Air Supply
Connect an appropriate air hose and set the regulator to approximately 0.2–0.3 MPa (2–3 bar).
Step 7 — Test Spray
Test the spray pattern on a scrap panel before applying the coating to the vehicle.
Step 8 — Apply the Coating
Maintain a consistent spray distance and apply multiple controlled passes as required to achieve the desired coverage and texture.
Step 9 — Allow Proper Drying
Follow the coating manufacturer's recommended drying and curing conditions before exposing the vehicle to service conditions or applying a compatible topcoat.
Texture consistency depends on both equipment and technique.
For repeatable results:
Fully mix the coating before spraying and maintain consistent material temperature and condition.
Avoid continuously changing the distance between the gun and substrate.
Start around 2.5 bar and adjust within the recommended range according to the material and desired pattern.
Avoid stopping repeatedly in one area, which may create uneven build-up.
Different undercoating products can behave differently. Always establish the preferred pressure and spray distance on a test surface first.
| Feature | LB-09 Undercoating Gun | Conventional Paint Spray Gun |
|---|---|---|
| Primary Material | Undercoating and textured coatings | Primer, basecoat, clear coat |
| Material Viscosity | Medium to high / textured materials | Generally lower-viscosity coatings |
| Material Passage | Approx. 2.0–2.5 mm | Typically finer |
| Feed Method | Suction-fed from compatible can | Commonly cup-fed |
| Spray Objective | Protective / textured coating | Fine paint atomization |
| Typical Finish | Textured / protective | Smooth / fine |
| Typical Application | Underbody, wheel arches, side skirts | Vehicle exterior paintwork |
The LB-09 should not be treated as a replacement for a conventional automotive paint spray gun. Its design is intended for a different material and application category.
| Item | Specification |
|---|---|
| Product Name | Automotive Undercoating Gun |
| Model | LB-09 |
| Type | Pneumatic Suction-Fed Undercoating Gun |
| Material | Alloy |
| Gun Length | Approx. 220 mm |
| Gun Height | Approx. 200 mm |
| Overall Size | Approx. 220 × 49 × 290 mm |
| Suction Tube Length | Approx. 250 mm |
| Nozzle Inner Diameter | Approx. 2.0–2.5 mm |
| Recommended Working Pressure | 0.2–0.3 MPa / 2–3 bar |
| Air Connection | Pneumatic Quick-Connect Fitting |
| Recommended Air Hose | 8 mm |
| Recommended Compressor | ≥3 HP |
| Approx. Weight | 0.285 kg |
| Compatible Container | 1–2 L Threaded Can |
| Suitable Materials | Undercoating, Body Schutz, Stone Chip Coating |
| Application | Automotive Underbody Protection / Refinishing |
| HS Code | 8424200000 |
The standard gun assembly includes:
The suction tube is designed to extend into the coating container for direct material pickup.
Actual packaging configuration should be confirmed according to the supplier's current packing specification.
For stable pneumatic operation, an air compressor of approximately 3 HP or above is recommended.
It is also recommended to use:
Moisture or contamination in compressed air can affect spraying stability and may negatively influence the coating application.
Before spraying, check that:
After use, clean the gun according to the coating manufacturer's recommended cleaning procedure.
Particular attention should be given to:
Do not allow cured coating to remain inside the material passage.
For cleaning agents, always confirm compatibility with the gun materials and the coating manufacturer's recommendations.
Check whether the actual nozzle passage is consistent with the stated specification.
Confirm tube length, straightness and connection quality.
Verify that the locking nut and connection are securely manufactured.
Check compatibility with the intended pneumatic hose and quick-connect fitting.
The trigger should operate smoothly without excessive looseness.
Check the air connection and gun body for abnormal leakage during operation.
Test the gun with the intended coating to evaluate material delivery and texture consistency.
The LB-09 can be supplied as an automotive refinishing accessory for:
For wholesale programs, buyers can evaluate:
For customers selling undercoating, Body Schutz or stone chip coating, the LB-09 can also be offered as a compatible application tool to create a more complete product solution.
The long suction tube allows compatible threaded-can materials to be sprayed without transferring them into a separate cup.
The approximately 2.0–2.5 mm material passage is suitable for many high-viscosity and textured automotive protective coatings.
Air pressure, spray distance and application technique can be adjusted to help achieve different undercoating textures.
Approx. 0.285 kg construction provides a lightweight tool for localized and repeated workshop applications.
Suitable for compatible coatings used on wheel arches, side skirts, rocker panels, underbody areas and other stone-impact zones.
Works with a conventional compressed-air system and recommended 8 mm air hose.
The LB-09 is designed for spraying compatible automotive undercoatings, Body Schutz, stone chip coatings and other textured protective materials. Typical applications include vehicle underbodies, wheel arches, side skirts, rocker panels and localized stone chip protection areas.
Yes. The gun uses a suction-fed design with an approximately 250 mm long metal suction tube. It is designed to draw material directly from compatible 1–2 L threaded cans, reducing the need for transferring coating into a separate spray cup.
Typical compatible materials include automotive undercoating, Body Schutz, stone chip coating, rubberized undercoating and other suitable textured protective coatings. Material compatibility should always be confirmed with the coating manufacturer.
The recommended working pressure is approximately 0.2–0.3 MPa (2–3 bar). Around 2.5 bar can be used as a practical starting point, followed by test spraying and adjustment according to the coating and desired texture.
Yes. Texture can be influenced by air pressure, spray distance, trigger operation, coating condition and application technique. Testing on a scrap panel before production spraying is recommended.
A compressor of approximately 3 HP or above is recommended. A pressure regulator and water separator are also recommended to provide cleaner and more stable compressed air.
The LB-09 is designed primarily for thicker and textured protective coatings rather than conventional fine automotive paints such as basecoat or clear coat. A conventional automotive paint spray gun is generally more appropriate for fine paint atomization.
Clean the material passage, suction tube, container connection and nozzle area promptly after use according to the coating manufacturer's cleaning recommendations. Prevent coating from curing inside the gun, as cured material can restrict material flow and affect subsequent spraying.
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