Sooner or later, every inflatable boat owner faces a need for repair or upgrade, and most often, questions arise when gluing a transom plate that serves as a support for the water. mounted-engineThe quality of this work directly depends on the safety on the water and the durability of the entire structure.
An improper operation can cause a heavy motor to tear off while driving, with serious consequences. In this article, we will examine all the subtleties of the process, from the choice of materials to the final drying, so you can be sure of the reliability of the mount.
Modern technology allows you to do this work at home, without going to specialized workshops, the main thing is to strictly observe the temperature regime and application technology. polyurethaneBecause it provides the necessary elasticity and strength of the seam.
⚠️ Warning: Never try to glue a transom in the cold or at temperatures below +15 C, as the glue is not polymerized and the compound will be leaky.
Selection of suitable materials and tools
Before you start, you need to prepare everything you need to make sure that the process is not interrupted by the search for trifles. two-componentThe use of household adhesives such as Moment or Superglue is unacceptable, as they do not withstand dynamic loads and vibrations.
In addition to adhesive, you'll need a degreasing agent, and it's best to use acetone or a specialty. solventIt's a softening material that allows you to do what's called cold welding, and you'll also need a hard bristling brush, a rolling roller, and a dryer to warm up the surfaces.
It is important to pay attention to the choice of the slingboard itself, which must be made of moisture-resistant plywood or composite materials that do not swell when in contact with water. The thickness of the board usually varies from 12 to 25 mm depending on the power of the motor that is planned to be installed.
- 🛠️ Two-component polyurethane adhesive (e.g., Kleyberg, Texacol or specialized formulations).
- 🧪 Degreasing agent (acetone, white spirit or special solvent).
- 🖌️ A brush, spatula and roller for even distribution.
- 🔥 Building hair dryer to activate the adhesive layer.
⚠️ Note: Use only those solvents recommended by the PVC fabric manufacturer, otherwise you can damage the structure of the material and loosen the board.
Preparation of the surface of the boat and transpant
The quality of the gluing depends 90% on how well you prepare the surfaces. The boat cylinder and the plywood itself should not contain dust, dirt, oils or residues of old glue. If you change the old transom insert, it should be carefully removed by heating the seam with a hairdryer and cutting off the residue of the material.
The adhesive area on the cylinder should be thoroughly cleaned with fine sandpaper (grain 120-220), this is necessary to remove the glossy layer and create microscrapes into which the glue will penetrate, providing a glossy layer. couplingYou have to be careful not to damage the cords of the tissue.
After cleaning, the surfaces are necessarily degreased. Rub the gluing site with rags dipped in the solvent and let it dry completely. A layer of glue is also applied to the plywood board, and it is advisable to pre-soak the ends of the tree with varnish or primer to protect against moisture.
☑️ Preparation for gluing
Glue application technology
The adhesive application process requires carefulness and time intervals, and the glue is applied to both the adhesive surfaces, both on the boat and on the transom layer, and the first layer is often rubbed into the material to saturate the pores, after which it is allowed to dry to a sticky state.
The drying time of the first layer is usually 15 to 30 minutes, but the exact data is always indicated on the packaging of the particular product. The second layer is applied more abundantly and also aged until the point when it stops sticking to the fingers, but retains stickiness. This is when the connection occurs.
To activate the adhesive layer, professionals recommend heating the surface with a building hair dryer to a temperature of 50-60 ° C. This accelerates the evaporation of the solvent and increases adhesion. However, it is important not to overheat the PVC, since at high temperatures the material can deform.
If the glue is too thick and does not lie well, add 3-5% of the solvent, but mix the composition carefully to a homogeneous mass.
The connection of the parts should be fast and accurate, because after contact it will be impossible to move the elements. Immediately after docking, the gluing site must be carefully rolled from the center to the edges to drive out the air bubbles.
Sticking and fixing process
The most critical thing is to combine the transom and the cylinder, because the glue is captured instantly after contact with the activated surfaces, you can't make a mistake in positioning. Mark the installation site in advance so that the transom is standing exactly relative to the diametrical plane of the boat.
After rolling, it is recommended to install an additional load or use rods to fix the transom during primary polymerization. glue-stitch It will be monolithic throughout the length.
Don't try to load the structure right away or test it for strength. The glue builds up its final strength within 24-72 hours, depending on the temperature and humidity in the room. Early use can lead to stratification.
| Parameter | Meaning/Recommendation | Note |
|---|---|---|
| Sticking temperature | +18...+25°C | Optimal regimen |
| Time to dry 1 layer | 15-20 minutes | Before the stickiness disappears |
| Time to dry 2 layers | 5-10 minutes | To the state of "otch." |
| Complete polymerization | 24-72 hours | Depends on the thickness of the seam. |
Features of working with different types of PVC
Materials used for boat production may vary in density and composition of the upper protective layer. The fabric density of 750-850 g/m2 is glued in the standard way, but for denser reinforced materials (1100 g/m2 and above), more thorough cleaning and longer warming up is required.
If you are working with a boat that has already been operated, there may be oxides or contaminants on the surface that are not removed by conventional degreasing, in which cases re-treatment with solvent or the use of a special primer for complex surfaces may be necessary.
⚠️ Warning: When working with colored fabrics, make sure that the solvent does not leave stains and does not wash the paint from the surface of the balloon.
What to do if the glue freezes too quickly?
If the glue on the surface has frozen and is no longer sticky ahead of time, apply a thin layer of fresh solvent, warm up with a hair dryer and try to activate the surface again. If it doesn't work, wash the old layer and apply it again.
Quality control and finishing check
After the time of full polymerization has passed, you need to perform a visual and tactile inspection of the seam, there should be no blobs, no blisters or areas where the glue is not applied, the seam should be smooth, elastic and should not peel off when trying to bend the edge.
Check the geometry of the transom installation. It should be perpendicular to the bottom (or at an angle provided by the boat design) so that the motor works efficiently and does not create excessive resistance to water.
The first step with the new transom is better done in calm weather and at low speeds, which will make sure that the attachment is reliable under a real, but for now gentle load, if there are no problems within a few hours of operation, you can return to normal use.
The main secret of success is the cleanliness of surfaces and the observance of the aging time of the glue before joining the parts.
Frequently Asked Questions (FAQ)
Can I put a squirrel on a boat in winter in an unheated garage?
No, it's strictly forbidden. At temperatures below 15°C, the chemical reaction of the adhesive polymerization stops or goes extremely slowly, making the compound weak and short-lived.
How much dried PVC glue to full strength?
Although the stickiness disappears after 30-60 minutes, the full chemical strength (100%) of the adhesive gains only after 24-72 hours.
Do I need to clean the plywood of the transmutant with sandpaper?
Yes, plywood needs to be skinned to remove the top smooth layer and pile, and to increase the contact area, but it needs to be done carefully so as not to damage the structure of the wood before impregnation.
How to replace a special glue for PVC in an emergency?
Household adhesives lack the elasticity and water resistance required, and using the wrong compounds will cause the transom to tear off for an outboard motor load, which is life-threatening.