Operation of inflatable boats of rigid hull, known as rib (RIB) is associated with the risk of mechanical damage, whether it's a sharp stone on the shore, hidden driftwood under water or careless handling of tools in the parking lot, the integrity of the cylinders can be violated at any time. repair In the field or in a home garage, returning the boat to service in a matter of hours.
Restoring leakproofness requires not only materials, but also an understanding of the chemistry of bonding processes. It is important to distinguish between the types of materials that make up your cylinders, as repair technologies are used to make them more difficult to maintain. PVC (PVC) and Hypalon The wrong choice of glue or method can cause the lapel to unstick at the most critical moment, turning a walk into a struggle for survival on the water.
In this article, we will take a closer look at the algorithms for dealing with various types of damage, from microscopic cuts to severe seam ruptures, how to properly prepare the surface, which glue to choose for specific operating conditions, and whether you should do it yourself or trust professionals.
Diagnosis of damage: search for leaks and defects
Before you start active action, you need to precisely localize the site of damage, and often visual inspection does not give results, especially if the puncture is microscopic or in a difficult place, for example, under a protective tape or in the area of the timber. Tightness It is a key safety parameter, so the search must be thorough.
The simplest and most effective method is to use a soap solution: get water into the spray gun, add liquid soap or shampoo to form thick foam and apply it profusely to suspicious areas. Inflate the balloon to working pressure, carefully monitor the surface: the appearance of inflatable bubbles will indicate a leak. If the bubbles appear slowly, perhaps the damage is in the area of the suture gluing.
Visual inspection is also required, looking for traces of tissue dissection, scuffing, bloating or color change, and paying special attention to the docking of cylinders with the stains. chunk And the bottom, because there is maximum load.
- 🔍 Carefully inspect the area around the valves - often leakage occurs due to weakening of the down nut or crack in the valve body itself.
- 💧 Check the seams for stratification by carefully trying to push the edges (without bigotry) at the joints.
- 👂 In a quiet room, you can try to hear the characteristic whistling of the outgoing air, bringing your ear to the surface of the balloon.
Once you find a leak site, be sure to mark it with a marker or chalk so you don't lose it in preparation for repairs. If there are several damages, number them for successive repairs.
Selection of materials: glue, fabric and tools
The success of the repair of the RIB boat depends on 90% on the correct choice of materials. The market offers many options, but not all of them are compatible with each other. The basic rule is that the material of the lap and glue must chemically match the material of the cylinder. The use of universal "superglues" on a cyanacrylate basis is strictly prohibited, they make the material tough and brittle.
For boats made of polyvinyl chloride (PVC) Two-component polyurethane adhesives are used, and they create a strong, elastic compound that can withstand warping and temperature changes.Hypalon) a special contact adhesive is required, often requiring an activator or heating to activate the polymerization process.
Below is a comparative table of the main specifications of adhesive compositions:
| Type of glue | Basis | Polymerization time | Temperature conditions |
|---|---|---|---|
| Polyurethane (2 comp.) | Polyurethane | 24-72 hours | -40 to +80°C |
| Polychloroprene | neoprene | 12:24 hours. | From -30 to +70°C |
| single-component | PVC | 12 hours. | From -20 to +60°C |
In addition to the glue, you will need: degreasing (acetone or special solvent), sandpaper (P220-P400 grain), roller (preferably Teflon or silicone), scissors and a dryer for heat treatment. The lat is better cut from the remake kit that comes with the boat, or use the same fabric as the boat itself.
Always check the shelf life of the glue before buying. Two-component compounds do not live long after opening the package, so it is better to buy small tubes for a one-time repair.
Technology of repair of punctures and cuts on PVC
Repair of minor damage to cylinders from PVC It's a process that's accessible to every owner, and the key is to get the surface prepared carefully, so the glue doesn't stick to dirty, greasy or oxidized surfaces, so you can't ignore the cleaning step.
First, the area around the damage is cleared with sandpaper, the top glossy layer is removed to make the surface matte, then the surface is degreased, then the first layer of glue is applied to both glued surfaces (the balloon and the latto) and left to dry until "stick" (usually 10-15 minutes).
⚠️ Warning: Never apply glue to a wet or cold surface. The optimal temperature for gluing PVC is from +15 to +25 C. At lower temperatures, the polymerization reaction may not begin.
Then a second layer of glue is applied (if it is prescribed by the instructions for a particular brand), and the lat is tightly pressed to the site of damage. With the roller, you need to expel all air bubbles from under the lats, moving from the center to the edges. To achieve maximum strength, it is recommended to warm the compound up to a temperature of 50-60 ° C and roll again.
The final polymerization takes 12 to 24 hours, and before that time, loading the boat or pumping it to working pressure is not recommended. Full strength of the adhesive seam is collected only 3 days after repair.
☑️ Checklist for PVC repair
Features of Hypalon and Neoprena Recovery
Boats from Hypalon And unlike PVC, where the layers are chemically fused, adhesion and the bonding between the layers are important, and often the vulcanization or activator method is used to repair these boats.
It starts with a surface strip, but it's important not to overdo it and damage the reinforcement cord. After degreasing, you put a layer of glue that should dry completely. Then you put a second layer on it, and you put the lapel on it. activator Or heat that triggers the grip reaction.
Some craftsmen use cold vulcanization, applying a special compound and pressing the load for a long time; others prefer to heat the gluing site with a building hair dryer or even an iron (through Teflon paper) to activate the glue.
- 🌡️ Hypalon 60-70°C
- ⏳ Drying time: Between layers of glue may require a longer pause than for PVC (up to 30-40 minutes).
- 🛡️ Protection: after repair of the joint site, it is often recommended to additionally treat with protective compositions against UV radiation.
If you're not sure about the type of material on your boat, do a test: put some acetone on a discreet spot. If it sticks and softens, it's PVC. If there's no change, it's probably Hypalon or something.
What to do if you do not have a special glue for Hypalon?
In an emergency, you can use two-part polyurethane adhesives, but the adhesion will be lower, and for reliability on top, you can apply a mechanical bandage or use a sealant for pools, but this is a temporary solution.
Seam repair and replacement of the transom board
Seed dissection is a more serious problem that requires a professional approach. If the seam begins to diverge, simply applying glue over the top is often not enough, because dirt and moisture may have already entered the seam, you need to carefully cut the seam, clean the inner surfaces, dry them and glue them again using the "pop" method or applying reinforced tape.
Replacement coatboard It requires when the wood inside is rotten by moisture, or the plywood has been decomposed, and it requires completely uncoupling the cylinders from the transom, a time-consuming process that requires heating the old seams and carefully cutting the material.
The new board is cut from moisture-resistant plywood (FSF) of the same thickness as the original. Be sure to treat the ends and surfaces of the new board with an antiseptic and cover with several layers of varnish or epoxy. The cylinders are glued to the new transom using a technology similar to the repair of cylinders, but with a larger contact area.
It is important to observe geometry: the skewed transom will lead to the fact that the boat will scour on the move or tilt on its side.
⚠️ Note: When replacing the transom, make sure that the height of the engine's lower unit remains correct. Using plywood of greater thickness will lift the motor, leading to cavitation and overheating of the engine.
Removal of damage to the hard bottom and keel
The hard bottom of a RIB boat (aluminum or fiberglass) can also be damaged. Aluminum is susceptible to corrosion and mechanical dents. Small cracks in the aluminum bottom can be brewed with argon welding or special epoxy compounds with aluminum powder for temporary repairs.
The fiberglass floor is laminated, the damaged area is cleaned to a clean fiberglass, degreased and filled with layers of fiberglass soaked in epoxy, and it is important to restore not only the tightness, but also the rigidity of the structure.
The inflatable keel, if damaged, is repaired in a similar way to cylinders. However, due to the high internal pressure in the keel (usually higher than in cylinders), the quality of the gluing is higher, and it is better to make a rounded shape, without sharp angles, to avoid stress concentration.
The quality of the hard bottom repair directly affects the boat's performance, and the irregularities on the bottom create additional water resistance and noise.
Prevention and care of the boat RIB
To repair the boat RIB is not a frequent guest in your schedule, you must follow the rules of operation and storage. Regular maintenance prolongs the life of materials and maintains their elasticity.
After every fishing or walk, the boat should be washed with fresh water, especially if you have been swimming in salt water. The salt crystallizes and can damage the structure of the tissue and seams. Drying before packaging is mandatory: a wet boat in a case is the ideal environment for mold development that corrodes the fabric.
Keep the boat in a straightened or half-folded form, in a dry room, away from direct sunlight and heating appliances. Ultraviolet is the main enemy of PVC and rubber, causing them to age and crack.
- 🧼 Wash the boat with a soft sponge, avoiding abrasive cleaning products.
- ☀️ Use UV filtered protective sprays before long periods of sun exposure.
- 🔧 Regularly check the pressure in the cylinders with a pressure gauge, avoiding pumping in hot weather.
Compliance with these simple rules will allow your boat RIB to serve faithfully for many years, delighting with reliability and safety on the water.
Frequently Asked Questions (FAQ)
Can I put a PVC boat in cold weather?
It is strongly discouraged. At temperatures below +10°C, polyurethane adhesives do not polymerize properly. The seam will be weak and may disperse. If repairs are urgent, use a heat gun or move the boat to a heated room.
What is the difference between repairing a boat from PVC and Haipalon?
PVC is bonded by a chemical reaction (cold welding) to dissolve the surface layer. Haipalon requires adhesion bonding, often with activators and heating, since the material is more chemically inert.
How long does the boat glue dry?
The primary contraction time is 15-30 minutes, but full polymerization and maximum strength set take 24 to 72 hours depending on the type of adhesive and ambient temperature.
Can I use the Moment or Superclay for repair?
No, conventional household adhesives don't have the elasticity and water resistance they need, they harden and crack when the cylinder is deformed, and they can also chemically break down the boat material.