Inflatable boat owners from the family Ufimka They know that this boat has earned a reputation for being "unkillable" due to its dense fabric and high-quality assembly. PVC It is susceptible to wear, mechanical damage or aging of components during long-term operation, and sooner or later, every water motor is faced with the question of whether to carry out scheduled or emergency repairs.
Independent restoration of the tightness of cylinders or bottom is a process quite real if there is a high-quality boat remake for Ufimka 21Unlike cheap ones, the original kits contain components that are chemically compatible with the body material, which guarantees the durability of the seam. In this article, we will discuss in detail what exactly should be included in such a set, how to choose the right adhesive and replace valves without contacting the service.
Ignoring minor punctures or scuffs can lead to serious water problems when the count goes on for minutes. Timely replacement of a worn valve or sealing of a microcrack in the seam will save your boat from sudden air venting at the most inopportune moment. Therefore, the presence of a well-equipped kit for repair is not just a recommendation, but a prerequisite for safety on the water.
Composition of the standard remake of Ufimka 21
The standard factory kit, which often comes with a new boat, or the professional extended kit, purchased separately, have a clear structure, the main purpose of these components is to ensure reliable adhesion (clutch) of the patch with the main material of the board or bottom. polyurethane, which after polymerization becomes elastic and water resistant.
It is important to understand that the composition of the adhesive can vary depending on the year of the boat and the manufacturer of the fabric, but the principle of operation remains the same. In addition to the adhesive itself, there are always flaps of tissue identical to the main one in the kit (often this is the case). reinforced PVC These flaps are used to create patches that completely replicate the properties of the housing.
And in a quality remix, you'll find some special surface preparation tools, like a degreasing solvent or a primer that activates the surface before bonding, and without pre-treatment, even the most expensive glue doesn't guarantee that the seam is tight 100%.
- 🧪 Two-component glue (base and hardener) in tubes or cans.
- ✂️ PVC repair fabric patches (often of different colors for stealth or contrast).
- 🧽 A degreasing agent or solvent for surface preparation.
- 🖌️ A brush or spatula for applying glue.
- 📜 Instructions with recommendations on temperature and drying time.
Some extended versions of kits may include spare valves or tools for their installation, but most often the valves and complex elements are purchased separately, as they require individual selection for a specific modification of the boat. Ufim 21.
Typical damage and diagnosis of the boat
Before you start repairs, you need to precisely localize the damage. Ufimka Most often, they suffer from cuts on sharp stones on the shore, punctures with fishing hooks or thermal burns from fire sparks. Diagnosis begins with a visual examination, but often microcracks or "eating" (slow air venting) are not visible to the eye.
The most reliable way to find a leak is to use a soap solution. Pour a lot of foam on suspicious areas: seams, valves, bottom. The appearance of inflatable bubbles will indicate the exit of air. Pay special attention to the places where the cylinders dock with the transom and bottom, where the load on the material is maximum.
⚠️ Warning: If the boat is heated in the sun, do not test it immediately with cold water - a sharp temperature drop can cause microcracks in the fabric or seams.
Once a defect is detected, it is important to assess the nature of the defect, if only the top protective film is damaged and the reinforcement layer is intact, repair may not be necessary. But if the air compartment is leaky, the use of the remix becomes mandatory. Deep cuts require a patch on both sides or the use of a reinforced internal insert.
Replacement of air valve yourself
One of the most frequent operations in the maintenance of the boat Ufam 21 is the replacement or repair of the air valve. Over time, rubber seals tan and the plastic case can crack from impact. For this procedure, you will need a special key (often comes with the valve) and glue.
The process begins with a complete air vent and an old valve being twisted out, and if the valve is stuck or overgrown with dirt, it needs to be cleaned carefully and tried to develop. Once dismantled, the hole is thoroughly cleaned of the residue of the old glue and defatted, which is a critical step, because any fat will prevent the new compound from grasping.
☑️ Valve replacement
The new valve is mounted on the glue. Apply a thin layer. polyurethane adhesive You can use the first layer to dry (usually 10-15 minutes), then apply the second layer and tightly screw the valve, and it's important not to overdo it when you twist it so that you don't damage the thread or the fabric.
- 🔑 Use only the special key that comes with the kit, so as not to tear the edges.
- 🌡️ Work is carried out at a temperature not lower than +15 C for proper polymerization of the glue.
- ⏳ Do not pump the boat for at least 24 hours after the valve is installed.
After the replacement, be sure to test with soap solution. If there are no bubbles, then the leakage is restored. Ufamki have a reliable fixation system and rarely fail when handled carefully.
Technology of patch installation on PVC
Repairing punctures and cuts on cylinders or the bottom of a boat requires strict adherence to technology. Simply sticking a piece of fabric is not enough - under load such a patch will quickly move away. The surface around the damage is cleaned with fine sandpaper (granularity 200-400) to create roughness, which will increase the contact area of the glue.
Cut the patch out of the repair material. It should cover the damage by at least 3-5 cm on all sides. It is better to round the corners of the patch so that they do not pick up during operation. Before applying the glue, both surfaces (patch and boat) are carefully degreased.
The procedure for applying glue:1. Apply a thin layer on the boat and patch.
2. wait 10-15 minutes until the stickiness disappears (first layer).
3. Apply the second layer on both surfaces.
4. Press the patch hard, expelling air bubbles from the center to the edges.
Once glued, the repair site must be rolled with a hard roller or screwdriver handle through a dense fabric (to avoid damaging the surface), which will ensure maximum contact between the layers. Some craftsmen recommend heating the dryer site to 50-60°C to activate the properties of the adhesive, but this requires caution.
Do I need to grind the fabric before gluing?
Yes, light grinding removes the oxide layer and creates micro-scratches that the glue penetrates, forming a mechanical clutch, but don't overdo it and damage the reinforcement mesh inside the PVC.
The finished patch should become a monolithic extension of the hull. A day after the repair, the boat can be fully operated. If you used a high-quality remake for the Ufimka 21 boat and followed the instructions, the gluing site will withstand any load.
Comparison of adhesive compositions for repair
The choice of adhesive is 90% of the success of a repair. The table below compares the main types of adhesives that can be found in remixes or sold separately to work with the company. PVC materials.
| Type of glue | Basis | Drying time | Water resistance | Stitch flexibility |
|---|---|---|---|---|
| Polyurethane (2 comp.) | Polyurethane + hardener | 24 hours (full) | High. | High. |
| Polychloroprene | neoprene | 12:24 hours. | Medium | Medium |
| Single-component urethane | Polyurethane | 24-48 hours | High. | Very high. |
| Cyanacrylate (Supergly) | cyanacrylate | Minutes. | Low. | Low (fragile) |
As you can see from the table, polyurethane They are the gold standard for boats. UfimkaThey create a seam that is not afraid of water, ultraviolet light and constant deformation of the inflated cylinder. Single-component analogs dry longer and may require humidity to activate.
It is strongly recommended not to use conventional household “superglues” or solvent-based adhesives, not intended for PVC. They make the material rigid and brittle, which will cause the tissue to rupture around the patch at the first pumping of the boat.
Store the glue in the fridge (not in the freezer!) in tightly closed containers, this will prolong its shelf life, but before using, be sure to let the tube heat up to room temperature.
Care and prevention of damage
To make the Ufimka 21 refit as rare as possible, it is important to properly operate and store the craft. PVC's main enemy is ultraviolet light and improper drying before packaging. If you remove the wet boat into the case, the inside will begin a process of "blooming" (reproduction of microorganisms), which destroys the fabric from the inside.
When transporting on a trailer or roof of a car, be sure to use a protective awning. Even small gravel flying from under the wheels at high speed can leave deep dents or cuts on cylinders. It is also worth regularly checking the pressure in the cylinders: a pumped boat in the sun risks bursting at the seams.
⚠️ Warning: Never leave a fully pumped boat in direct sunlight unattended. The air pressure inside rises with the temperature, which can cause the seams to rupture.
Regular treatment with special protective compounds (UV sprays, PVC air conditioners) helps to maintain the elasticity of the material and protect it from burnout, such products are applied after washing and drying the boat at the end of the season.
Proper drying and storage in the shade are the main factors prolonging the life of the Ufimka 21 boat for 5-7 years or more.
Frequently Asked Questions (FAQ)
Is it possible to seal the boat Ufimka with the usual glue "Moment"?
You can only use a regular "moment" (based on polychlorprene) as a temporary measure. It is not suitable for permanent repairs, because the seam is not elastic enough and can be retracted under load. It is better to use specialized two-component compounds for PVC.
How long after the repair can I lower the boat into the water?
The minimum polymerization time for adhesive is 24 hours at +20°C. If the temperature is lower, the time should be increased to 48 hours. Early immersion or pumping can disrupt the formation of the seam.
What if the valve poisons the air, but visually intact?
It's probably a problem with the sealing ring getting dirty, or the pressure nut getting loose, so try to unscrew the valve, flush it, grease it with silicone and re-twistle it, and if it doesn't work, you need to replace the valve.
What is the optimal size for a 2 mm puncture?
Even for a small puncture, the patch must cover the damage by at least 30-40 mm (3-4 cm) in each direction. Small patches have a small area of clutch and risk being severed by air pressure.
Do I need to re-surface the place after repair?
No, you don't have to grind the seam, but instead, try to make the transition from patch to base material as smooth as possible, without stepping, so that there is no bullying of edges during operation.