When choosing a protective or decorative coating for metal surfaces, doors or body elements, there is often a need for a material that hides irregularities and creates a durable film. In everyday life, such a substance is often referred to simply as “rough paint”, but professionals use more accurate technical terms. The main name for this type of coating is hammer-enamelAfter the swelling, it is a silhouette that is reminiscent of the silhouette of the hammer.
This feature of texture is not accidental: it is created specifically to mask defects of the base, such as scratches, dents or corrosion marks, which would appear through a smooth gloss. Besides, hammer-effect It is achieved due to the complex chemical composition, including aluminum powder and special silicones, which, when drying, create uneven tension of the film.
However, if you are interested not only in the decorative effect, but also in the high degree of roughness for anti-slip properties, then we can talk about the decorative effect. rubber-paint or specialized corrosion-proofing with fillers. Understanding the difference between these materials is critical to making the right choice, as their purpose and application technology differ significantly.
Hammer enamel: the king of rough coatings
The most common answer to the question of what is called rough paint, will be precisely “hammer”. This is alkyd-styrene or epoxy enamel, which, when solidified, forms a unique relief. Hammer effect This is achieved due to the fact that the solvent evaporates unevenly, dragging along pigment particles and creating the visual illusion of coining on metal.
The main advantage of such compounds is their ability to hide small surface defects without the need for perfect grinding. Aluminum powderThe , which is part of the composition, not only forms the texture, but also reflects ultraviolet light, protecting the binder from burnout. This makes the material ideal for outdoor use where durability and aesthetics are required.
Modern hammer paints are often made based on alkydThis allows them to be applied even to slightly rusty surfaces, since they have high penetrating properties. However, to achieve maximum service life, it is still recommended to pre-clean the base of the flaking elements.
⚠️ Note: When working with hammer enamel based on organic solvents, be sure to use a respirator, as the solvent vapors are toxic and can cause dizziness.
Anti-corrosion compounds with zinc and texture
In industrial and automotive repair, a rough surface is often a sign of the presence of solid fillers in the paint, such as zinc dust or quartz sand. These materials are called zinc-containing soil or tread coatings. Their roughness is not a decorative technique, but a consequence of the high concentration of metal powder, which creates galvanic protection.
The texture of these coatings resembles coarse-grained sand or matte concrete. Zinc soils Often used as an intermediate layer, but there are finish enamels with a similar structure, designed for operation in aggressive environments. The roughness here increases the area of contact with air, which in the case of zinc enhances the cathode protection of iron.
If you are looking for material to restore the bottom of the car or protect metal structures, pay attention to the compositions marked “antigravium”. They make fat, raggedIt extinguishes vibrations and prevents small stones from hitting the metal body.
For better adhesion of corrosion-resistant compounds with zinc, the surface should be defatted, but not necessarily to shine - light roughness after sandblasting will only improve adhesion.
Rubber paint and its unique properties
Special attention should be paid to the material, which is often called simply “liquid rubber”. Technically, latex It's high in polymers. After drying, it forms an elastic, matte and pleasant to the touch film, which really has a velvety-rough texture.
Unlike hammer enamels, rubber paint does not have a characteristic “metallic” shine and pattern. Its roughness is more uniform and resembles dense skin or soft plastic. This material is widely used for waterproofing, as well as for the creation of slip-coating on steps, ramps and in garages.
An important feature is that rubber-paint It is able to stretch at temperature deformations of the base without cracking. This makes it an excellent choice for regions with sharp temperature changes, where conventional hard enamel quickly lose their properties.
Can I paint with rubber paint on rust?
No, rubber paint requires a perfectly prepared base. Unlike hammer enamels, it does not penetrate rust and does not stop corrosion. If you apply it to rusty metal, the oxidation process will continue under the film, and the coating will be billed.
Technology of application and surface preparation
The quality of the final result directly depends on the preparation of the base and compliance with the application technology. Most rough paints, whether hammer or rubber, require careful care. degreasing surface. The presence of fat spots can cause the paint to “curl up” or form craters.
It is best to apply the material with a spray gun, as this allows you to get the most uniform texture. When using a brush or roller hammer-effect It may appear unevenly, and rubber paint may leave traces of pile or stripe. It is important to observe the intervals between the layers specified by the manufacturer on the package.
The temperature regime also plays an important role: most formulations require application at a temperature not lower than +5 ° C and air humidity not more than 80%. Violation of these conditions can lead to clouding of the film or long drying.
☑️ Preparation for painting
Comparative table of coating characteristics
To make it easier to decide on the choice of material, it is worth comparing the main parameters of different types of rough paints. Each of them has its own strengths and scope that cannot be ignored when planning work.
| Parameter | Hammer enamel | Rubber paint | Zinc soil | Antigravium |
|---|---|---|---|---|
| Basis | Alkyde/Epoxy | Acrylate-latex | Epoxide/Polyurethane | Rubber/Polyurethane |
| Texture | Coinage, pattern | Velvet, mate. | Coarse-grained | Shagrenee, rough. |
| Elasticity | Low. | Tall. | Medium | Tall. |
| Resistance to UV | Tall. | Medium | Tall. | Tall. |
From the table it is clear that for decorative purposes, where the appearance and imitation of forging is important, hammer enamel is best suited. If the priority is waterproofing and elasticity, then the choice falls on the waterproofing. rubber-stuff. For serious protection against corrosion in industrial conditions, zinc soils are indispensable.
Frequent errors in selection and operation
One common mistake is to try to paint a smooth glossy surface with hammer paint without pre-surfacing. In this case, adhesion will be insufficient, and the coating can be detached by layers after a few months of operation. Brushy paints require a rough base for reliable grip.
The compatibility of materials should not be ignored either. For example, applying organic solvent-based paint over an old nitroemal layer may cause the bottom layer to swell. Always run a compatibility test on a small area or use it. soil-insulating.
Another mistake is saving on the number of layers. Woolly texture often requires 2-3 layers to achieve uniform color and claimed film thickness. One thin layer may look transparent and not provide adequate protection for the metal.
The correct choice of the type of rough paint depends not only on the desired appearance, but also on the operating conditions: humidity, temperature changes and mechanical loads.
Can I apply hammer paint to a tree?
Yes, you can, but only after careful preparation. The tree must be primed with alkyd soil to close the pores and prevent the absorption of the solvent. Without soil, the paint will lie unevenly, and the texture may not appear.
How to dilute thickened rough paint?
For hammer enamel on an alkyd basis, white spirit or solvent is used. Rubber paints can be diluted with water, but not more than 5-10% of the volume. It is important not to overdo it, otherwise the texture effect will be lost.
How long does the hammer paint dry?
The drying time "from dust" is about 2 hours at a temperature of +20 ° C. Full polymerization and strength gain occur within 24-48 hours. In the cold season, the process can take up to 3-4 days.
Does rough paint remove rust?
Paint by itself does not remove rust. However, there are rust converters that can be applied before painting. Some hammer enamel allow application to tightly held rust, but it is better still mechanically clean the metal.
What's the expense of these paints?
The flow rate depends on the method of application and surface roughness. On average, it is 1 liter per 8-10 m2 when applied in one layer. On very uneven surfaces, the flow can increase by one and a half times.