Operating an inflatable vessel often involves the risk of damaging cylinders and bottoms against rocks, snags or shells. Standard protection made of thin PVC fabric does not always withstand the aggressive effects of the bottom of the reservoir, especially if you often moor near unequipped shores or lower the boat from a steep slope. The question of how to strengthen the bottom of the PVC boat becomes critical for owners who want to protect themselves from sudden punctures and loss of buoyancy on the water.
There are several effective ways to increase wear-resistant From the installation of removable sleighs to the addition of reinforced material, the right protection not only saves from sharp objects, but also improves the performance of the vessel, making the bottom more rigid and resistant to the abrasive effects of sand. In this article, we will discuss in detail the reinforcement technologies, compare popular materials and give step-by-step recommendations for the installation of protective elements.
It is important to understand that any extra weight affects load capacity and speed, so the choice of method should be considered. We will consider both temporary solutions and major design changes that will allow you to feel more confident in any swimming conditions.
Analysis of the state protection and the need for strengthening
Most budget and mid-budget models of inflatable boats are equipped with what is called a “heel” – a layer of denser fabric in the center of the bottom. However, this measure is often insufficient for difficult operating conditions. A thin layer of PVC quickly wears on the pebbles, and accidental contact with a sharp knot or fitting can lead to a serious hole in the area of greatest load. Tightness The main priority is the hull, and relying only on factory protection in extreme conditions is risky.
The need for reinforcement is dictated not only by the topography of the bottom, but also by the design of the vessel itself. Low-pressure inflatable floor (LBP) is more comfortable, but much more vulnerable than hard sleigh. If you plan to frequent landings on unequipped shores or wiring boats in shallow water, additional armor becomes mandatory. Ignoring this aspect can lead to expensive repairs in the high season.
⚠️ Warning: Operation of a boat with a damaged or worn protective heel significantly increases the risk of sudden depressurization of cylinders when hitting obstacles hidden under water.
The current state of the bottom should be assessed regularly, and if you notice thinning of the material, the appearance of villi or small scratches, this is a direct signal to action, timely strengthening will be cheaper than buying a new set of cylinders or the entire boat.
Selection of material for bottom protection
The PVC repair and tuning market offers several solutions, each with its own advantages. PVC-reinforced fabric It combines perfectly with the material of cylinders, has a similar temperature expansion coefficient and provides reliable protection against punctures. For reinforcement, polyurethane-coated boat fabric is often used, which is highly elastic and resistant to fuel.
The second option is the use of specialized liquid formulations or rubber-based stickers, but they provide only surface protection against abrasive and will not save from serious puncture. lanomatThis material is a rubber-based composite and synthetic fiber that is very good at cushioning shocks.
- 🛡️ PVC reinforced fabric: classic solution requiring glue and skills to work with PVC, provides maximum tightness and durability.
- 🧱 LanoMat (Lanomat): modern composite material, which does not require gluing over the entire area, perfectly holds the impact and does not rot.
- 🪵 Plywood slugs: rigid protection, turning the inflatable floor into a solid platform, but increasing the weight and taking up space during transportation.
When choosing a material, it is critical to consider compatibility with the boat's main material. The use of incompatible adhesives or fabrics can lead to detachment of the protection or chemical reaction that destroys the structure of the PVC. Always check the recommendations of the boat manufacturer regarding permissible materials for tuning.
Technology of gluing additional PVC linings
The process of strengthening the bottom by gluing the linings requires surface preparation, high-quality glue and temperature control. This is the most time-consuming, but also the most reliable way to create monolithic protection. Before starting work, the boat must be thoroughly washed, dryed and degreased with special compounds that do not contain aggressive solvents that can damage the fabric structure.
To do this, you'll need a two-piece polyurethane glue, a roller, a heat dryer, and a scissor, and you'll need to apply the glue to both of the glues (boat bottom and lining) in two layers, and the first layer must be fully absorbed, and the second layer applied, and it's important to let the glue dry to a sticky state when it stops sticking to your fingers, but it retains stickiness.
☑️ Preparation for linings
When rolling, you need to carefully remove the air bubbles, moving from the center to the edges. Once completed, the boat must dry for at least 24-48 hours at room temperature before first using or pumping.
⚠️ Warning: Overheating of PVC fabric with a building hair dryer above 80 C can lead to deformation of the material and loss of its strength specifications, so monitor the heating temperature.
Use of composite materials and LanoMata
An alternative to time-consuming gluing is the use of modern composite materials, such as: lanomatThis material does not require glue to be applied to the entire surface of the boat, which preserves the repairability of the main cylinder. LanoMat is attached to the perimeter or fixed mechanically, creating a powerful buffer layer between the bottom of the reservoir and the thin shell of the boat.
The main advantage of these materials is high shock absorption, and when hitting a rock, the impact energy is extinguished by the structure of the composite, without being transmitted to PVC. This is especially true for inflatable floor boats, where the risk of damage from below is maximum, and they also do not absorb water, do not rot and are resistant to ultraviolet light.
| Parameter | PVC lining (Plugging) | LanoMat (Composite) | Plywood slut |
|---|---|---|---|
| Weight. | Low. | Medium. | Highly |
| Difficulty of installation | High. | Low. | Medium |
| Impact protection | Medium | High. | Maximum |
| Impact on packaging | Minimum | Minor. | Substantial |
When mounting composite sheets, it is important to ensure that water and sand are not stuffed between the protection and the bottom of the boat. Some craftsmen recommend smearing the perimeter with a thin layer of sealant to prevent abrasive from entering, which prolongs the life of both the protection itself and the boat's material.
The Secret of LanoMata's Durability
Many users are unaware that LanoMat can be further protected from abrasion at the edges by gluing the perimeter with a narrow strip of the same PVC fabric, which prevents the edges of the composite from being stratified during prolonged use on a rocky bottom.
Installation of rigid slates and transpanel boards
Hard flooring is a radical reinforcement method that turns an inflatable boat into a kind of rigid hull. Plywood or aluminum sleighs, laid on the inflatable floor, take over all the mechanical load. This method uses marine plywood at least 9-12 mm thick, covered with non-slip film or paint.
Mounting is done by stacking sheets on top of an inflated bottom. It is important that the geometry of the slates accurately matches the inner diameter of the boat, to eliminate displacement and friction on the side. The hard floor not only protects against punctures, but also allows you to stand confidently on your feet, which is critical for fishing in wandering boots or active fishing.
However, there are significant disadvantages to this method: the weight of the plywood greatly increases the total weight of the kit, and when assembled, the boat takes up more space, and the rigid elements can rub cylinders from the inside with strong swing, unless special protective belts are used along the sides.
- 📏 Accuracy of cutting: Sleighs must be cut to within millimeters so as not to create stress points on cylinders.
- 🌊 Wet resistance: Use only plywood of the brand FSF, as it is resistant to moisture, unlike conventional construction plywood.
- 🛡️ Edge protection: The ends of the plywood must be painted or glued so that the water does not blur the wood.
For owners of boats with an inflatable floor (NDND), the installation of a full-fledged hard floor is impossible without serious alteration, so they should consider the option of installing local rigid inserts only in the leg area or for an outboard motor compartment.
To make the slates easier to build, you can use sandwich panels or plywood with drilled holes (in non-load zones) covered with fiberglass, which will reduce weight by 20-30%.
Care for reinforced bottom and prevention of damage
Even reinforced bottoms require regular maintenance and inspections. After each foray into the water, especially in salt water or muddy conditions, the boat must be washed with fresh water. Salt and silt, stuck between linings or under sleighs, work as an abrasive paste, gradually erasing the protective layer.
Check the condition of the seams and edges of the linings regularly. Even small detachments signal immediate repair. It is much easier and faster to glue a small area than changing all the protection or repairing the cylinder. Use special remixes that come with the boat, or purchase a tube of quality PVC glue in advance.
Keeping a boat with installed hard sleighs in a deflated state is not recommended for a long time, as this can lead to the formation of PVC cracks in the folding areas. It is better to store the sleighs separately or keep the boat in a half-inflated state in a warm room.
⚠️ Note: Do not use aggressive solvents, gasoline or acetone to clean the reinforced bottom - they can destroy the adhesive layer of linings and the PVC material itself.
Keeping simple rules of operation and storage will allow you to forget about punctures and enjoy swimming for years to come. Properly reinforced bottoms are an investment in your safety and peace of mind on the water.
An integrated approach to reinforcement (combination of linings and careful operation) increases the life of the PVC boat by 2-3 times.
FAQ: Frequently asked questions
Can I strengthen the bottom of the boat without removing the old defense?
Yes, you can put a new layer on top of the old one if it's holding tight, but you have to clean and degrease the surface of the old one, and make sure there's no moisture or detachment underneath, and a double layer will increase weight, but it will increase reliability.
Which glue is best for gluing PVC linings?
It is best to use two-component polyurethane adhesives (for example, Texacoll, WURTH They create an elastic and water-resistant compound that withstands dynamic loads and temperature changes.
How much will the weight of the boat increase after the bottom is strengthened?
With PVC overlays, the weight will increase slightly (by 1-3 kg depending on the area), the installation of plywood sleeves will add from 5 to 15 kg. Composite materials occupy an intermediate position, adding about 2-4 kg.
Can I use car tires to protect the bottom?
It is not recommended to use regular rubber, as it is poorly glued to PVC, quickly breaks down from ultraviolet light and may contain chemicals harmful to the structure of an inflatable boat.