PVC inflatable boats have long ceased to be just a means for quiet fishing on paddles. Modern models often require installation. squirrel It's a way to attach the outboard motor, which turns the boat into a full speed boat, but over time or because of factory failure, it may be necessary to glue the transom over again to ensure safety and tightness of the structure.
Doing this work at home requires not only high-quality materials, but also strict adherence to temperature and surface preparation technology. polyvinyl chloride This will cause a powerful motor to simply rip off the transom at the most inopportune moment, and in this article we will discuss in detail the process that will allow you to avoid fatal errors.
There are two main ways to fix it: hot (with thermally activated glue) and cold. The choice of method depends on the type of adhesive composition used and the fabric structure of your boat. Professional workshops more often use the hot method for maximum strength, but cold gluing when properly executed gives an excellent result.
Before you start active, you need to assess the condition of the transom liner itself and the cylinder tissue at the contact point. If the PVC fabric is worn or has microcracks, simple pasting will not help - you will need an installation. reinforcer Or even repairing the boat itself.
Selection of the appropriate adhesive composition
The success of the whole operation depends on the right chemistry, and the market offers many options, but for the best possible solution. PVC-plated Not all of them are suitable. The most popular are two-component polyurethane adhesives, which, after mixing with a hardener, react irreversibly.
Single-component formulations based on polychlorprene (neoprene) are also widely used, especially for the cold method, they take longer to dry and often need an activator, but forgive small errors in temperature. It is critical to use a glue specifically designed to glue dissimilar materials if your transom has a wooden base with a plastic coating.
When choosing, consider the elasticity of the seam after polymerization. PVC boats are dynamic structures that constantly change volume and shape under pressure from water and air. The rigid, glass seam will quickly crack from the vibration of the motor.
- 🧪 Two-component polyurethane adhesives - provide maximum strength and heat resistance of the seam.
- 💧 Single-component compositions It is easier to use, but requires strict adherence to exposure time.
- 🔥 Temperature-activated adhesives - require heat to 50-60 degrees to start the reaction.
You don't have to skimp on chemistry by buying cheap ones from construction stores. Texacoll, Wurth or Radical They are more expensive, but they ensure that the transom will withstand the load.
Why not use the usual “moment”?
The usual cyanacrylate glue ("Superglue") creates a rigid, inelastic compound that breaks down when the cylinder is first deformed on water, and it is also afraid of moisture and temperature changes.
Preparation of tools and work area
The quality of the gluing depends on the conditions in which you work. The ideal option is a clean, dry and well-ventilated room with air temperatures from +18 to +25 degrees Celsius. High humidity or dust can negate all efforts, getting between layers of glue.
You need a toolkit that you have on hand to keep the process going, and the main tool is a building hair dryer, preferably with the ability to adjust the temperature accurately, and you also need a roller, a degreaser and abrasives.
Special attention should be paid to surface preparation, old glue and contaminants should be completely removed, and this is done by mechanical cleaning and chemical treatment. acetone or special PVC cleaners will help to remove the fat film, but it is important not to overstretch them on the fabric, so as not to dissolve the material itself.
- 🌡️ Construction hair dryer - to heat surfaces and activate the adhesive layer.
- 🧽 Abrasive materials sandpaper or scotch bright to create roughness.
- 🧴 Degreaser Acetone, alcohol or a specialized cleaner.
If you work in a garage in winter, be sure to warm up the room in advance. The cold adhesive will not spread evenly, and the cold fabric of the balloon will not give up the heat necessary for polymerization.
Use paint tape to mark the boundaries of applying glue - this will avoid the composition on the visible parts of the boat and make the seam line neat.
Technology of surface preparation for bonding
Preparation is the most time-consuming step, and the final outcome depends on it, and you have to first dismantle the old transom, if it was installed earlier, and you have to do this carefully, so that you don't damage the cylinder fabric with sharp edges of wood or metal.
Once dismantled, the surface is thoroughly cleaned, and the purpose of the sweep is not to remove the PVC layer, but to create a micro-relief for better grip. Use fine-grained sandpaper or special scotch bright. The movements should be circular and uniform throughout the contact area.
The next step is degrease, apply the solvent to the clean rag and wipe the cleaned area, and note that the rag must be without the pile, otherwise the villi will remain on the surface and disrupt the adhesion. Re-grease-freeing It is recommended to be carried out immediately before applying the glue.
If there is any residue of old glue on the squirrel board, it should be mechanically cleaned or heated with a hairdryer and removed with a spatula. The wooden base of the transom should also be prepared: hide and, if necessary, cover with soil or varnish to protect against moisture, if this has not been done previously.
It's important to check the geometry of the transom, so if it's deformed by moisture or stress, the gluing will be poor, and then you'd better make a new transmutation board out of moisture-resistant plywood.
Step by step: hot method of gluing
The hot method is considered the most reliable for PVC boats designed for operation with powerful motors, it provides deep penetration of glue into the structure of the material and creates a monolithic connection.
First, the adhesive is applied in a thin, uniform layer on both surfaces to be glued together, on the boat fabric and on the transom back (or reinforcing lining), and the layer must be transparent, without bald spots or clots, and after application, wait until the time specified in the adhesive instructions is given so that the solvent partially evaporates.
Then the surfaces are heated with a building hair dryer. The temperature should not exceed 60-70 degrees, otherwise the PVC will begin to melt or deform. Greathe until the glue becomes sticky and begins to stretch with threads when you touch your finger.
☑️ Hot gluing algorithm
Once heated, the surfaces quickly join together, and it's important to press them very tightly together immediately, and roll them carefully from the center to the edges, expelling air bubbles, and the pressure must be considerable to ensure close contact.
Once the parts are joined, the structure must be left for full polymerization, which usually takes 24 to 72 hours depending on the ambient temperature, and loading the compound before that time is strictly forbidden.
Cold method of installation of the transceiver device
The cold method is less demanding because it does not require a hair dryer, but is more critical to the time of exposure and quality of preparation, a method often used for repair in the field or when using specific types of glue.
The application technology is similar to the hot method: glue is applied to both surfaces, but the key difference is that after applying the glue, the surfaces are not heated, but let them dry to "stick", a condition where the glue stops staining the finger, but still sticky.
The drying time can range from 30 minutes to several hours, the exact time is indicated on the glue pack, it is important not to overdry the layer, otherwise the adhesion will be lost, if the glue has dried up, the application procedure will have to be repeated.
The connection is made by tightly pressing the parts. Since there is no thermal activation, the role of pressure and exposure time increases, it is recommended to use loads or rods to hold the transom in the right position during the initial grasp.
Cold gluing can be less resistant to extreme temperatures, so the boat after such repairs should not be left under direct sunlight on a hot summer day without protection.
The main difference of the cold method is the lack of heating, which is compensated by an increased time of aging of the glue to the state of "atlip" and more thorough pressing.
Quality control and defect table
Once the work is done and the glue is dry, you need to do a visual and tactile inspection of the seam, so there should be no bloating, no detachment, no areas where the glue is not at the edges (this is a sign of a good pressing), and any defects are better fixed immediately than risking on the water.
Often, beginners face typical problems, and to help you diagnose possible errors, we've compiled a table of the main defects and the causes of their occurrence.
| Defect | Probable cause | Elimination |
|---|---|---|
| Separation of edges | Bad pinch or dirt | Warming and re-rolling |
| Glue bubbles | Air came in when we glued it. | Needle puncture and rolling |
| The seam doesn't hold. | Mistake in glue selection | Complete gluing |
| Dark spots. | Overheating with a hairdryer | Temperature monitoring |
If you find that the transom walks or makes sounds when pressed, then the clutch is not strong enough, and then you don't have to wait for a miracle, you have to redo the work. Safety at sea He doesn't tolerate compromise.
It's also worth checking the angle of the transom, which should match the lower unit of your motor, and the wrong angle will cause the boat to roll, bury the nose in a wave, or overheat the engine.
How to check the strength of the seam at home?
Try to carefully, without fanaticism, turn the transom over the balloon, if you hear a crack of tear or you notice a deformation of the edges, the glue does not grab.
Security measures and frequent errors
Working with chemicals and heating appliances requires safety precautions: solvent and glue vapors are toxic and flammable, and only work in a well-ventilated environment, away from open fire sources.
One of the most common mistakes is rushing, and people try to start the motor a couple of hours after gluing, preventing the polymerization from being completed, and this causes the seam to rupture under load. Complete polymerization It can take up to three days.
⚠️ Attention: Never use an open fire (gas burners) to heat the glue instead of a hair dryer. You can't control the temperature with a flame, you're guaranteed to burn PVC fabric.
Another mistake is to put too thick adhesives, and the glue has to work as a bonding link, not as a void filler, and the thick layer will dry longer, and it may swell and not provide the necessary strength.
Don't forget to protect your hands and your respiratory system, gloves will prevent aggressive chemicals from coming to your skin, and a respirator will protect your lungs from harmful fumes, and after you work, you need to clean the tools immediately before the glue freezes.
Store the remains of two-component glue separately: the base and hardener can not be kept mixed even in a closed container - the jar can explode from the pressure of gases.
Questions and Answers (FAQ)
Can I put a squirrel on a boat in winter?
It is strongly recommended not to work at temperatures below +15 ° C. PVC becomes rigid, and the chemical reactions in the glue slow down or stop. If there is no other way out, you need to organize a heated room.
How much dried PVC glue?
Primary grip takes 2-4 hours, but full polymerization and maximum strength gain take 24 to 72 hours.
Do I need to clean the surface if it is clean?
Yes, it must. The smooth surface of PVC has low adhesion. Mechanical stripping increases the area of contact between the adhesive and the material by a factor, which is critical for reliability.
How to defat PVC before gluing?
It is best to use special PVC cleaners or acetone. Gasoline and solvents with fatty impurities can not be used, as they will leave a film that will worsen the gluing.