Severe Russian winters, constant reagents on the roads and high humidity create ideal conditions for the rapid development of corrosion on the metal elements of a car. In such conditions, owners are forced to look for reliable and cost-effective methods of protection, and one of the means proven over decades remains cannon fat. This material, originally developed for the preservation of artillery barrels, has proven itself to be an effective anticorrosive agent for hidden body cavities, sills and arches.
Unlike modern synthetic compounds, which often cost many times more, this product has unique penetrating ability and adhesion. Cannon fat creates an elastic film that does not crack in the cold and does not flow in the heat, reliably blocking the access of oxygen and moisture to the metal. However, for the product to work effectively, it must be properly prepared and applied, following a certain technology.
In this article we will analyze in detail all stages of work: from choosing a tool and preparing the surface to the final processing of hard-to-reach places. You'll learn how to heat material safely, what precautions you need to take, and why. heating temperature should not exceed 90 degrees Celsiusso as not to lose protective properties. Proper use of this composition will extend the life of your car body for many years.
What is cannon lard and its benefits for cars
Gun lard is a grease-like substance obtained by thickening petroleum oils with ceresin and petrolatum with the addition of anti-corrosion additives. Initially, this material was created for the conservation of military equipment, where maximum resistance to aggressive environments was required. In the automotive industry, it is used to treat hidden cavities, such as side members, door pillars and inner fender cavities, where rust is most likely to form.
The main advantage of this product is its high penetrating ability combined with excellent adhesion. After application, the material does not dry completely, remaining plastic, which allows it to self-heal minor damage to the protective layer. This is critical for suspension and underbody components that are constantly subject to vibration and impacts from small stones.
- 🛡️ High water resistance and the ability to displace moisture from microcracks.
- 🌡️ Preservation of elasticity in a wide temperature range from -50 to +50 degrees.
- 💰 Affordable price compared to modern imported analogues.
- 🔧 Possibility of re-application without removing the old layer.
It is worth noting that cannon fat is not a decorative coating. It has a dark, almost black color and a specific odor, so its use on visible external body parts is impractical. The main area of application is internal cavities and structural elements hidden from view, where functional corrosion protection is important, and not appearance.
⚠️ Attention: The material belongs to the class of flammable liquids when heated. It is strictly forbidden to heat it over an open fire or leave it unattended during the heating process.
Necessary tools and workplace preparation
Before starting work, it is necessary to prepare not only the material itself, but also the appropriate equipment. Since cannon lard is supplied in a solid or semi-solid state, pre-heating it to a liquid state is a prerequisite for its use. To do this, you will need a container for a water bath or a special heating apparatus capable of maintaining a stable temperature.
An air gun with a long flexible tube and a nozzle for anti-gravel materials is ideal for applying the compound into hidden cavities. If there are no pneumatic tools, you can use brushes with stiff bristles for open surfaces, but the quality of processing internal cavities in this case will be much lower. You will also need a solvent (white spirit or Galosh gasoline) to degrease surfaces and clean tools.
Particular attention should be paid to preparing the workplace. The application process requires good ventilation, as vapors from heated petroleum products can be toxic. It is better to carry out work in a garage with a working hood or outdoors in dry weather. The ambient temperature should not be lower than +10 degrees, otherwise the material will cool too quickly on the metal surface without having time to penetrate microcracks.
List of required equipment:
- 🔥 Heating element (tile, water bath) to warm up the composition.
- 🔫 Pneumatic gun with a nozzle for hard-to-reach places.
- 🧤 Personal protective equipment: gloves, glasses, respirator.
- 🧽 Metal brushes, rags and degreaser.
☑️ Preparation for processing
Body surface preparation technology
The quality of anti-corrosion treatment depends 80% on surface preparation. Application cannon fat it will not have any effect on dirt, oil or loose rust, but will only preserve moisture under a layer of protection, accelerating decay. The first step should always be a thorough car wash, preferably using a Karcher to dislodge dirt from hidden cavities and arches.
After washing, it is necessary to carry out troubleshooting of the body. All areas of corrosion must be cleaned to bare metal. To do this, use metal brushes, sandpaper or a sandblaster for large areas. If the rust is not completely removed, it will continue to develop under the protective layer. In difficult cases, it is advisable to treat the cleaned areas rust converter, strictly following the instructions on the packaging.
An important step is degreasing. Even if the metal is visually clean, invisible films of oil or silicone may remain on it, which will reduce adhesion. The surface is wiped with a rag soaked in solvent. After degreasing, you should not touch the treated areas with gloved hands, so as not to leave grease marks.
| Type of pollution | Removal method | Necessary tool |
|---|---|---|
| Dirt and dust | Pressure washing | High pressure washer |
| Loose rust | Mechanical stripping | Brush, sandpaper |
| Oil stains | Degreasing | Rags, solvent |
| Old anticorrosive | Partial removal (if peeled off) | Spatula, scraper |
It is recommended to cover plastic and rubber elements that may be damaged by solvents or high temperatures with masking tape or polyethylene. Although gun lard is inert to most plastics, the harsh solvents used for preparation can damage some plastics.
Proper heating and application of material
The most critical stage is bringing the material into working condition. Cannon fat melts at a temperature of about 50-60 degrees, but to apply it through a sprayer it must be heated to 80-90 degrees. Exceeding this temperature can lead to a change in the chemical composition and loss of protective properties, so heating control is required.
It is best to heat the material in a water bath. To do this, the jar with the composition is placed in a container of water and heated on the stove. This method ensures uniform heating and eliminates the risk of fire. If an electric heater is used, it is necessary to ensure that the bottom of the jar does not directly touch the hot elements of the heating element.
Is it possible to heat on an open fire?
Heating cannon fat over an open fire (gas burner, fire) is extremely dangerous. Petroleum vapors are highly flammable, and a metal can can quickly overheat at the point of contact with the flame, causing the contents to ignite. Use only a water bath or electric stove.
The application process is carried out as follows:
- 🌡️ Warm up the composition to a temperature of 80-90 degrees (consistency of liquid honey).
- 🔫 Pour hot material into the spray tank (pre-heat the tank so that the material does not freeze in it).
- 💨 Apply the layer evenly, holding the gun at a distance of 15-20 cm from the surface.
- 👁️ Control the coating: the layer should be continuous, without gaps, about 0.2-0.4 mm thick.
When processing hidden cavities, the gun nozzle is inserted through technological holes. During the spraying process, the can or hose must be slowly removed, continuing to spray so that the composition covers the entire internal surface. It is important not to overdo it: a layer that is too thick can leak at the first heat, staining everything around.
⚠️ Attention: Working with hot compounds requires the use of heat-resistant gloves. Contact with hot lard on the skin causes serious burns.
If gun grease begins to thicken in the gun reservoir during operation, do not attempt to clean the nozzle with your finger. Remove the tank and briefly immerse it in hot water to restore fluidity.
Treatment of hidden cavities and hard-to-reach places
It is the hidden cavities (spars, sills, pillars) that rot first, since moisture stagnates there and does not dry out. For high-quality processing of them, a conventional pistol may not be enough. It is recommended to use special nozzles with radial spraying (360 degrees), which allow you to cover the entire circumference of the internal cavity with the composition in one pass.
The technology for processing thresholds and side members requires access to their internal space. It is often necessary to drill additional holes in inconspicuous places or use existing technological plugs. Before alignment, make sure there are no wiring harnesses or fuel lines running through this area.
Sequence of actions when processing hidden cavities:
- Remove plastic covers, headlights and interior elements that block access to the service openings.
- Blow out cavities with compressed air to remove dust and remaining moisture.
- Insert the spray tube as deep into the cavity as possible.
- Squeeze the trigger and slowly pull out the tube to ensure even coverage.
- After drying, install the plugs back, after lubricating their edges with sealant.
Particular attention should be paid to welds inside thresholds and reinforcements. Cannon fat Thanks to its texture, it perfectly covers uneven seams, displacing air and moisture. This prevents the development of electrochemical corrosion, which often begins precisely at the welding sites.
High-quality processing of hidden cavities is impossible without a special elongated sprayer with a radial spray. Trying to fill the material with a syringe or brush will not provide a protective layer on the walls of the cavity.
Safety precautions and drying time
Safety when working with flammable materials and high temperatures should be a priority. The room must be ventilated, as fumes from solvents and heated petroleum products can cause dizziness or poisoning. Smoking in the immediate vicinity of the work site is strictly prohibited.
Drying time (polymerization) depends on the ambient temperature and the thickness of the applied layer. At a temperature of +20 degrees, the surface film is formed in 1-2 hours, but complete curing and the set of final properties take about 24 hours. During this period, it is better not to operate the car, especially in wet weather or on dusty roads.
If, after drying, you notice streaks on visible parts of the body, they can be removed by warming the area with a hair dryer and carefully collecting the excess with a rag. However, if the layer is applied correctly, no drips should form. Regular inspection of treated surfaces (once a year) will allow timely identification of mechanical damage to the protection and local restoration of them.
- 🔥 Ensure there is a fire extinguisher in the immediate vicinity of the work site.
- 🧤 Use safety glasses to prevent splashes from getting into your eyes.
- 🌬️ Organize forced ventilation of the room.
- 🗑️ Dispose of rags and leftover material in accordance with environmental standards.
⚠️ Attention: Rags soaked in oil and solvent are prone to spontaneous combustion when stored in a pile. Immediately after use, soak it in water or take it out to dry.
Frequently asked questions (FAQ)
Is it possible to mix cannon lard with other anticorrosives?
Mix cannon fat It is not recommended with bitumen-based materials, as they may have different chemical compatibility, which will lead to delamination or swelling of the coating. However, a fresh layer of the same composition can be applied on top of the old, well-adhering layer of cannon fat after degreasing.
How to wash gun fat from clothes or skin?
The material is removed from the skin using warm water and soap and mechanical friction with a washcloth. You can use vegetable oil or rich cream to soften the hardened layer before washing off. It is almost impossible to remove it from clothes, since petroleum products penetrate deeply into the fibers of the fabric and leave greasy stains.
Do I need to remove the old layer before re-processing?
Complete removal of the old layer is required only if active corrosion is detected underneath it or if the coating has peeled off from the metal. If the old layer holds tightly, it is enough to wash the surface, degrease it and apply a new layer on top of the old one. Cannon lard has good adhesion to itself.
Does cannon lard freeze in winter?
At extremely low temperatures (below -30 degrees), the material may thicken, but does not harden into stone and does not lose its protective properties. With the onset of heat, it becomes elastic again. This is one of the key differences from bitumen mastics, which can crack in the cold.
What is the service life of cannon lard protection?
With proper surface preparation and application of 2-3 layers, the protection remains effective for 2-3 years. However, in conditions of active use on winter roads with reagents, it is recommended to carry out preventive inspection and local restoration every 12 months.