Use of appropriate PPE: During handling, you should wear gloves, a sweatshirt, goggles and a suitable respiratory protector.Tips for handling polyester puttiesĪs we always point out, it is advisable to take extreme precautions when working with chemical products such as polyester putties: A recommended product would be URKI-KOMBI. They are used to cover small pores or scratches they have low mechanical resistance and must be applied in thin coats. Single-component polyester filler based on acrylic resin and drying only by air evaporation. These fillers allow less thickness, and are applied with an airbrush instead of a spatula, in order to optimise filler process times: BESA-ROC. Their application is non-porous and uniform. These are used for large surface filling. You can find different load sizes to better suit each repair. They are used for small repairs where small holes have been made in the bodywork. These are mainly used when you need to apply a thick coat of filler, mainly in major repairs where the part could not be levelled correctly by manual handling of the sheet metal. Examples of fibreglass reinforced putties: URKI-FIB and BESA-FIB. It is a type of very compact polyester putty in which it has been added fibreglass, providing it with great hardness and filling power, in addition to making it very adherent to different supports and materials. A recommended product would be BESA-SILVER. Aluminium particle-content fillers offer great adherence on different types of surfaces such as steel, aluminium or zinc coated substrates. This metallic component allows to increase the filling performance and hardness in comparison to other fillers. This filler contains aluminium metal pigments. A putty in this category would be MASI-FLEX. They tend to have a softer and less porous texture. It can provide good adherence to the different types of plastics in a car, such as bumpers or exterior mouldings. It is a type of putty that has a high level of shock absorption, and high elasticity and flexibility. These are recommended for levelling deformations in plastic parts. Examples of this type of putty: URKI-LIGHT or URKI-LOW. It is a type of easy-to-sand and apply polyester putty, which is versatile and has a good level of adherence on different supports such as galvanised aluminium, plastics, steel, etc. These are low-density putties, with hollow charges, which makes them lighter. It is easy to sand, apply, thin and flexible. We could also highlight the URKI-2000 in this section. A recommended product from this category of putties would be URKI-FAST. It also stands out for its versatile use, both in car refinishing and in industrial vehicles. ![]() It has great hardness and resistance, and it also provides good adherence to steel plate, galvanising and electrozinc coating. ![]() It’s the most common type of putty used in bodyshops. This technological evolution and the appearance of different types and compositions of putties also forces the bodywork professional to know each one of the variants that can better adapt better to each type of repair: Universal polyester putty Today, the wide variety of types of putties has allowed to improve productivity and profitability in repairs, offering also a better finish. The appearance of these new materials in bodywork has also forced manufacturers to develop new types of specially adapted putties, without detracting any loss of adherence, hardness, drying and sanding. In addition, it should make the sanding process easier, without having to apply excessive pressure or doing several sanding stages. The body filler must be easy to apply and to spread, resulting in a regular and homogeneous surface. ![]() Easy application and sanding of the filler In addition, especially on flexible supports such as plastics, the putty must provide elasticity to absorb possible impacts and vibrations, thus preventing cracking. These are the main characteristics a good bodywork putty must provide: Low porosity and high elasticityĪ quality putty should not generate many pores when applied, minimising irregularities on the surface. In addition, the polyester putty cannot function as primer for final finish paints because after sanding, you must apply a priming coat which will act as an insulating and anchoring coat. It should be noted that fillers do not generally provide metal corrosion protection, so if your intention is to provide protection to bare sheet metal, you should first apply an anti-corrosion primer.
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