With the onset of the first cold weather and precipitation mixed with reagents, the issue of body protection becomes more relevant than ever for every car owner. Ignoring this maintenance step can lead to the rapid development of corrosion, which over time turns the metal into a loose mass that cannot be restored. That's why anti-corrosion treatment is a mandatory procedure to extend the life of a vehicle.
Cannon lard is considered one of the most time-tested and effective means for protecting hidden cavities and the bottom. This material, originally created for the preservation of military equipment, has unique adhesion and the ability not to be washed off with water even after prolonged exposure to an aggressive environment. Unlike modern bitumen mastics, it remains flexible at all temperatures, making it an ideal choice for harsh climates.
In this material we will analyze in detail the preparation technology, the necessary tools and the process of applying this preservative to the body of your car. You will learn why it is important to maintain temperature conditions and how to avoid common mistakes that ruin all your efforts. A correctly carried out procedure will allow you to forget about rust for many years.
What is cannon lard and its benefits
Gun lard is a petrochemical product that is a viscous, ointment-like mass of yellow or brown color. Composition basis conservation oil consist of petroleum oils with high viscosity, thickened with ceresin and petrolatum. This formula provides the material with exceptional stickiness and water-repellent properties, which is critical for protecting the metal from moisture and salts.
The main feature of this material is its ability to penetrate deeply into microcracks and pores of the metal, displacing moisture from there. After application, a strong but elastic film is formed on the surface, which does not crack in the cold and does not flow in the heat. Temperature range operation ranges from minus 50 to plus 50 degrees Celsius, which covers any climatic zones.
- 🛡️ High adhesion to any metal surfaces, including painted and rusty areas.
- 💧 Excellent water-repellent properties and the ability to block oxygen access to metal.
- 🌡️ Maintains elasticity and protective properties over a wide temperature range.
- 🔧 Penetrating ability, allowing you to protect hidden cavities without completely disassembling the units.
It is important to understand that cannon lard is not a decorative coating. It does not have high mechanical strength, like anti-gravel, for example, so it is often used as a primary layer or for treating hidden cavities, where the risk of mechanical damage is minimal. For exposed underbody surfaces, it is often combined with other materials or applied under protective screens.
Necessary tools and preparation of the work area
Before starting work, it is necessary to carefully prepare not only the car, but also the workplace. The process of applying gun lard requires compliance with certain temperature conditions, since the material is supplied in a solid or semi-solid state and requires heating. The optimal ambient temperature for work should be no lower than +10 degrees Celsius, and the material itself must be heated to 90 degrees.
To carry out high-quality processing you will need specialized equipment. The main tool will be bullet gun or a pneumatic sprayer capable of handling viscous compounds. You can also use a hand pump or spray hose for hard-to-reach areas, but the spray method gives more even coverage.
It is extremely important to ensure the safety of the process, since the work is carried out with hot substances and flammable liquids. Be sure to use personal protective equipment: a respirator, safety glasses and gloves. Contact of hot lard on the skin can cause burns, and the fumes are toxic when heated.
⚠️ Attention: It is strictly forbidden to heat cannon lard over an open fire or directly on a gas stove without a water bath. This may cause vapors to ignite and cause a fire!
List of required equipment and materials:
- 🔥 Heat source (electric stove, hair dryer or water bath).
- 🔫 Pneumatic sprayer or compressor with a suitable nozzle.
- 🧼 Degreaser (white spirit, kerosene or specialized products).
- 🧽 Brushes, scrapers and rags for cleaning surfaces.
- 🛡️ Personal protective equipment (respirator, glasses, gloves).
Body preparation: cleaning and degreasing
The quality of anti-corrosion treatment depends 80% on proper surface preparation. Applying a protective composition to dirt, loose rust or moisture will not have any effect, since corrosion will continue to develop under the preservative film. Therefore, maximum attention should be paid to the primary stage.
The first step is to thoroughly wash the car, especially the lower body, arches and underbody. It is necessary to remove all layers of dirt, clay and road reagents. The best way to do this is to use a pressure washer. After washing, the body must be completely dry, as water under the layer of grease will cause corrosion.
This is followed by mechanical cleaning. All peeling pieces of paint, blisters and layers of rust must be removed with a wire brush or scraper. If the rust is deep, it is recommended to treat these areas rust converter, which will convert iron oxides into stable compounds. After the converter has dried, the surface is cleaned down to metal.
☑️ Surface preparation checklist
The final stage of preparation is degreasing. Even if the surface is visually clean, grease stains and silicones remain on it. Wipe the areas to be treated with a rag soaked in white spirit or degreaser. This will provide maximum grip cannon fat with metal.
Technology of heating and applying the composition
The process of applying cannon lard requires care and adherence to temperature conditions. The material is packaged in buckets or barrels and has a dense consistency. To bring it into working condition, it is necessary to heat the composition to a temperature of 80–90 degrees Celsius. At the same time, it becomes liquid like water, which allows it to penetrate into the smallest crevices.
It is best to heat lard in a water bath. Take a larger container, pour water into it and place a bucket of lard inside. Stir the composition periodically, controlling the temperature. If you have a hair dryer, you can heat directly in the working container, but make sure that the temperature does not exceed 100 degrees, otherwise the material may boil or lose its properties.
| Parameter | Meaning/Description | Note |
|---|---|---|
| Heating temperature | 80–90 °C | Optimal fluidity |
| Metal temperature | Not lower than +10 °C | For better adhesion |
| Spray pressure | 4–6 atm | Depends on viscosity |
| Layer thickness | 100–400 µm | Visually uniform shine |
The heated compound should be applied quickly before it cools down. Use the sprayer to spray large areas of the underbody and side members. For hidden cavities (thresholds, door pillars), use special spray nozzles with a long tube, inserting them through the technological holes. Move evenly so that the layer lays down without gaps.
How to check the quality of application?
After the composition has cooled (after about 2-3 hours), carry out a visual inspection. The surface should be evenly covered with a shiny, sticky film. If there are dry areas or bald spots, the procedure must be repeated. The layer should not be too thick to prevent runoff, but not too thin to provide protection.
Treatment of hidden cavities and hard-to-reach places
Hidden body cavities are the main sources of corrosion. Moisture and salt, getting inside the side members, sills and pillars, remain there for a long time, causing the metal to rot from the inside out. Gun lard is ideal for protecting these areas due to its high penetrating power.
To treat internal spaces, use special spray tubes with a nozzle that creates a conical spray. Insert the tube into the technological holes, which are usually closed with rubber plugs. If there are no or insufficient holes, drilling may be necessary, but try to use existing access.
When sprayed inside the cavity, a mist of hot oil is created, which settles on the walls. It is important not to overdo it and not to clog the drainage holes through which moisture is drained. After treatment, check that all drains are free.
- 🚗 Thresholds: process through holes for door hinges or specially provided holes.
- 🏗️ Spars: access through holes in the mudguards or from below the car.
- 🚪 Door pillars: spray through the top holes or removed speakers.
- 📦 Wheel arches: careful processing of the inner part of the fender liners.
⚠️ Attention: When treating the interior and internal cavities, make sure that the composition does not get on rubber seals, plastic panels and electrical wiring. Gun grease can destroy some types of rubber and plastic.
Comparison with modern analogues and service life
Despite the emergence of many modern anticorrosion agents based on waxes, synthetic resins and bitumen-rubber mastics, gun lard is not losing ground. Its main advantage is its time-tested effectiveness and cost. However, it also has competitors who can offer better mechanical strength or a more convenient application format.
Modern ML oils (cavity oils) often contain corrosion inhibitors and work on a similar principle, but have a less viscous consistency when cold. Bitumen mastics create a thicker and more durable layer that protects against stone impacts, but they are less elastic and can crack in severe frosts, allowing moisture to pass through.
The service life of high-quality cannon lard is from 2 to 4 years, depending on operating conditions. In regions with harsh winters and active use of reagents, it is recommended to check the condition of the coating annually. If the layer becomes thinner or washed away, the procedure must be repeated.
To enhance the protection of open areas of the bottom, a layer of anti-gravel can be applied over the cannon fat. This will create a strong shell that will protect the sticky layer of fat from mechanical tearing off by stones.
Frequently asked questions (FAQ)
Is it possible to apply gun lard to rust?
Yes, it is possible and even necessary. Gun lard has excellent penetrating ability and displaces moisture from the pores of rust, preserving the corrosion process. However, if the rust peels off in layers, it is better to first clean it mechanically for better adhesion.
At what temperature is it best to process?
The optimal ambient temperature is from +10 to +25 degrees Celsius. The composition itself should be heated to 80–90 degrees. If the air temperature is too low, the composition will quickly cool down on the metal, which will worsen its spreading and adhesion.
Is gun lard harmful to rubber seals?
Prolonged contact with petroleum products can negatively affect some types of rubber, causing it to swell or dry out. Therefore, when treating areas around doors and glass, you should be careful and immediately remove drops from rubber elements.
How to wash off gun fat if it gets on your clothes or skin?
Fresh composition can be easily removed with gasoline, kerosene or white spirit. The frozen layer will have to be softened by heating or using solvents. For the skin, it is better to use special cleansing pastes for motorists or a rich cream, and then wash off with soap.
Gun lard is a cost-effective and effective solution for preserving the bottom and hidden cavities, which, when applied correctly, provides reliable protection against corrosion for several years.