Protecting thresholds from corrosion is one of the most pressing tasks for owners of cars older than 5 years. Cannon fat (aka Movil preservation oil or NG-203) remains a product that has been proven for decades, which, when used correctly, extends the life of the body by 10-15 years. But here lies the catch: 90% of car owners make serious mistakes already at the preparation stage, which reduces the effectiveness of processing to zero.

This article is not theoretical reasoning, but practical steps taking into account the nuances for different types of cars (from VAZ-2107 up to Toyota Camry 2018+). We'll figure out why cannon lard GOST 19537-83 better than modern analogues, how to avoid leakage into the interior, and why winter treatment can turn into rust within a year. Without water - only specific actions, compatibility tables and answers to questions that are not covered even in service manuals.

What is cannon lard and why is it better than modern anticorrosion agents?

Cannon fat is petroleum oil based grease with the addition of additives (ceresin, paraffin, corrosion inhibitors). Its original formula was developed for the preservation of artillery pieces, hence the name. It has been used in the auto industry since the 1970s as a low-cost alternative. ML oils and Dinitrol.

Advantages over modern anticorrosion agents:

  • 🔹 Durability: retains properties for up to 5 years (versus 1-2 years for liquid anticorrosives).
  • 🔹 Self-healing: when the layer is damaged, the lubricant itself “tightens” microcracks.
  • 🔹 Versatility: Suitable for hidden cavities, welds and exposed surfaces.
  • 🔹 Price: 1 kg costs 3-5 times cheaper than imported analogues (Tectyl, Waxoyl).

But there is also critical flaws:

  • ⚠️ Temperature restrictions: thickens at -20°C, may run off at +40°C.
  • ⚠️ Difficulty of application: requires warming up and special tools.
  • ⚠️ Incompatibility with some paints (especially with acrylic varnishes).
📊 What anticorrosive agent did you use before?
Cannon fat
ML-oils (Movil)
Liquid anticorrosives (Dinitrol)
Wax compounds
Never processed

Preparing your car: 3 steps you can't skip

Mistakes at this stage are the main reason why lard does not stick or causes rust. Let's look at the process using an example Hyundai Solaris 2015 (similar for most foreign cars of the class B/C).

1. Washing and drying

  • 🚿 Water temperature: no higher than +40°C (hot water deforms the plastic threshold plugs).
  • 🧽 Detergent: use Kärcher RM 519 or analogues without wax (wax additives prevent the adhesion of lard).
  • 💨 Drying: compressor with a pressure of 4-6 bar (humidity inside the threshold should not exceed 15%).

2. Dismantling of elements

Remove:

  • 🔧 Plastic sill covers (on Kia Rio fastened with 5 pistons + 2 self-tapping screws).
  • 🔧 Plugs for technological holes (on Renault Logan - under the back door).
  • 🔧 Rugs and floor covering (if you plan to treat internal cavities).
💡

If you can't remove the sill trim, don't break the clips! B AvtoVAZ A special puller is provided for this purpose (article no. 2108-3407010).

3. Cleaning and degreasing

Use:

  • 🧴 Solvent 646 - to remove bitumen stains.
  • 🧴 White spirit - for degreasing metal.
  • 🧴 Metal bristle brush - to remove rust (only if the layer is no thicker than 0.1 mm!).

☑️ Checklist before processing

Done: 0 / 4

Choice of cannon fat: GOST vs modern analogues

There are 3 types of cannon lard on the market, and their properties are radically different:

Lard type Temperature range Protection period Price for 1 kg Application
NG-203 (GOST 19537-83) -30°C..+50°C 4-5 years 300-400 rub. Hidden cavities, welds
NG-203U (improved) -40°C..+60°C 5-7 years 500-600 rub. Open surfaces, arches
Movil with zinc -20°C..+40°C 2-3 years 250-350 rub. Only hidden cavities
Imported analogues (Tectyl 506) -50°C..+80°C 3-4 years 1200-1500 rub. Any surfaces

Key findings:

  • 🔑 For southern regions (Krasnodar, Rostov) the usual one will do NG-203.
  • 🔑 For Northern latitudes (Murmansk, Yakutia) - only NG-203U or Tectyl.
  • 🔑 Movil cheaper, but requires re-treatment every 2 years.
How to spot fake cannon fat?

The original lard NG-203 has a uniform dark brown color without lumps and a strong smell of gasoline. Counterfeits often contain paraffin (white speckles) and smell like diesel fuel. When heated, the original melts evenly, while the fake delaminates.

Filling technology: step-by-step instructions with photos

To work you will need:

  • 🔧 Gun for preservative oils (for example, Krafor KT-3001).
  • 🔧 Extension nozzle (length 30-50 cm for hard-to-reach places).
  • 🔧 Construction hair dryer (for heating lard in a jar).
  • 🔧 Nitrile gloves (rubber dissolves in lard!).

Step 1. Warming up the lard

Place the jar of lard in a container of hot water (+70..+80°C) for 15-20 minutes. Do not heat with open flame — this disrupts the structure of the additives! Optimal temperature for pouring: +50..+60°C.

Step 2. Filling into the thresholds

  1. Start with lower threshold point (usually at the front wing).
  2. Insert the nozzle to a depth of 10-15 cm and smoothly press the gun trigger.
  3. Move zigzag from bottom to top, filling the cavity 60-70% (not to the top!).
  4. For Toyota Corolla E170 and similar models with double thresholds fill both cavities (internal and external).
💡

On vehicles with galvanized body (Volkswagen Polo, Skoda Rapid) Apply a thin layer before processing zinc spray (for example, Loctite 7610) - this will increase the protection by 2 times.

Step 3. Processing of welds

Welds are the most vulnerable spot. Use natural bristle brush (artificial melts from lard) and apply a layer 1-2 mm thick. For Lada Vesta and XRAY pay attention to the seams in the area:

  • 🔹 Connections between the threshold and the spar.
  • 🔹 Threshold amplifier mounts.
  • 🔹 Places for welding bumper mounting brackets.

Step 4: Checking the tightness

After filling, close the technological holes rubber plugs (for example, 3130-3407010 for AvtoVAZ). Take the test:

  1. Close all doors and windows.
  2. Direct a stream of water from a hose (pressure 2-3 bar) at the threshold at an angle of 45°.
  3. Check the interior for leaks (especially under the driver's feet).
💡

If after treatment the smell of lard appears in the cabin, it means that the seal of the threshold has been broken. Remove excess immediately and check plugs!

5 critical mistakes and how to avoid them

Even experienced craftsmen make these mistakes, which negate all processing:

⚠️ Attention! If you poured lard at a temperature below +10°C, it will not penetrate into microcracks in the metal. Result: corrosion will appear within 6-12 months.

Error 1. Overheating of lard

When heated above +90°C, lard loses corrosion inhibitors. Optimal temperature for work: +50..+60°C. Use thermometer (for example, Testo 104-IR).

Error 2. Filling without preliminary cleaning

If there is dirt or old mastic left in the threshold, the new lard will lie unevenly. To clean use:

  • 🧹 Sandblasting machine (for severe corrosion).
  • 🧹 Brush with metal bristles + WD-40 (for light dirt).

Mistake 3: Ignoring Drain Holes

On Ford Focus 3 and Mazda 3 The drainage holes in the thresholds are often clogged with dirt. If you don't clean them, moisture will accumulate inside and the lard will simply wash away. Use wire with a diameter of 2-3 mm for cleaning.

Error 4. Wrong choice of nozzle

Different models require different attachments:

  • 🔧 Straight nozzle - for AvtoVAZ and UAZ.
  • 🔧 Flexible nozzle 90° - for Toyota RAV4 and Nissan Qashqai.
  • 🔧 Extended nozzle (50 cm) - for Mercedes Sprinter and minibuses.

Mistake 5: Not reprocessing

Cannon fat doesn't last forever. Re-processing times:

  • 📅 NG-203: every 4-5 years.
  • 📅 NG-203U: every 6-7 years.
  • 📅 Movil: every 2 years.

Comparison with alternative protection methods

Cannon lard isn't the only option. Let's look at the alternatives and their pros/cons:

Method Cost Protection period Pros Cons
Cannon fat 300-600 rub./kg 4-7 years Durable, self-healing, cheap Difficult to apply, leaks when overheated
Liquid anticorrosive (Dinitrol) 800-1200 rub./l 2-3 years Easy to apply, no leaks Short service life, expensive
Wax treatment (Turtle Wax) 500-900 rub./can 1-2 years Dries quickly and can be applied with a brush Washable with water, not for hidden cavities
Galvanic galvanization 15,000-30,000 rub. 10-15 years Maximum protection, no re-treatment required Expensive, requires complete disassembly of the body

When to choose cannon lard?

  • 🔹 Budget up to 1000 rubles. for processing.
  • 🔹 Long-term protection is needed (5+ years).
  • 🔹 The car is operated in a temperate climate.

When is it better to choose an alternative?

  • 🔹 Auto with aluminum body (Jaguar XE, Audi A8) - only Dinitrol ML.
  • 🔹 Extreme conditions (salty roads, +40°C in summer) — galvanic galvanization.
  • 🔹 No time to disassemble - liquid anticorrosive.

Post-treatment care: how to prolong the effect

Adding lard is only half the battle. To ensure that the protection lasts as long as possible:

1. Car wash

  • 🚿 Use contactless car wash (pressure no higher than 120 bar).
  • 🚿 Avoid shampoos with wax — they destroy the layer of fat.
  • 🚿 After washing, dry the thresholds compressor (inside humidity should not exceed 20%).

2. Checking the status

Every 6 months, inspect:

  • 🔍 Threshold plugs - for the presence of cracks.
  • 🔍 Welds - the appearance of red spots.
  • 🔍 Drainage holes - for clogging.

3. Reprocessing

Signs that it’s time to renew your lard:

  • ⚠️ Appearance white plaque on the thresholds (drying of additives).
  • ⚠️ Crunch when you press the threshold (moisture inside).
  • ⚠️ Rusty streaks from drainage holes.
💡

If you operate the vehicle in conditions high humidity (Primorsky Territory, St. Petersburg), reduce the inspection interval to 3 months!

FAQ: Answers to frequently asked questions

Is it possible to pour cannon lard in winter?

It is possible, but with reservations:

  • 🔹 The air temperature must be at least -10°C.
  • 🔹 Salo needs to be warmed up to +60°C (in a garage with a heater).
  • 🔹 After treatment, the car should stay warm for 12-24 hours.

If you pour lard at -20°C, it will not penetrate microcracks and the protection will be ineffective.

What to do if lard leaks into the cabin?

Causes and solutions:

  • 🔹 Leaky plugs: replace with new ones (for example, 2108-3407010-10 for VAZ).
  • 🔹 Overflow of lard: Remove excess with a flexible tube syringe.
  • 🔹 Cracks in the threshold: weld with argon welding and repeat processing.

If lard is already on the mat, remove it White spirit and ventilate the interior for 2-3 hours.

How much lard is needed to process one car?

Consumption depends on the model:

  • 🔹 Small hatchbacks (Daewoo Matiz, Oka): 0.5-0.7 kg.
  • 🔹 C-class sedans (Toyota Corolla, VW Polo): 1-1.2 kg.
  • 🔹 Crossovers (Renault Duster, Kia Sportage): 1.5-1.8 kg.
  • 🔹 SUVs (UAZ Patriot, Nissan Patrol): 2-2.5 kg.

When purchasing, take a margin of 10-15% (for losses during filling).

Is it possible to mix cannon lard with other anticorrosives?

Absolutely not! Gun lard is petroleum based, and most modern anticorrosion agents are synthetic. When mixing:

  • 🔹 Lumps form that clog the drainage holes.
  • 🔹 Adhesion decreases - lard peels off after 6-12 months.
  • 🔹 A chemical reaction with the release of toxic fumes is possible.

If another anticorrosive agent was previously used, remove it completely solvent 646 before adding lard.

How to check the quality of processing?

Carry out 3 tests:

  1. Visual: Inspect the sills for untreated areas (use a flashlight).
  2. Tactile: Press the threshold - if you hear a crunch, there is moisture left inside.
  3. Moisture resistance: spray the threshold with water from a hose - if after 10 minutes it is dry inside, the treatment is successful.

For an accurate check, use endoscope (for example, Borescope Teslong) to inspect hidden cavities.