![]() In this case, the part has lost the primer coat, so the adhesion promoter will have to be applied again to optimise the paint’s anchoring. You will need to apply an adhesion promoter or plastic primer to optimise the anchoring of the subsequent coats.Īnother option is to repair the plastic part. However, it can also happen that the new plastic part does not have this previous coat of primer, which in turn will influence the painting process. This way, professionals receive parts that are ready for applying the finish paint directly. Today, the most vehicle manufacturers supply replacement plastic parts with a pre-treatment (primer) which benefits the repainting process. For larger flaws, bumpers can be fully replaced by a newly manufactured part, although the preparation and repainting process will be different in this case. In repairs and paintings of plastic parts, professionals can be faced with different scenarios depending on the severity of the damage. It is also easy to apply and allows good adhesion to different types of substrates. Spray on adhesion promoter for plasticĪnother option is spray primers for plastics, such as SP/1895, a product suitable to repair patches and/or small surfaces. Primers applied to larger plastic surfaces can use an adhesion promoter in container format, which is applied with a spray gun.Īn example of this type of product is SINNEK’s PL/1895 adhesion promoter, which is compatible with a wide range of plastic parts in the automotive sector, such as PUR, PS, PA, EPDM, ABS, PVC, GRP. Gun sprayed adhesion promoter for plastic The type of plastic to repair will directly influence the primer’s adhesiveness. Which primer to use in the painting of plastic?ĭepending on the level of adhesion, thickness or viscosity of the product, you can find different types of primers for plastics. This is why the adhesion promoter plays a key role in the efficient repair of plastic parts on a vehicle body. Plastic primer, also known as plastic adhesion promoter, is a product that is mainly intended to optimise the adhesion of subsequent coats of paint, such as putty or filler paint, to the surface. The plastic primer applied at the auto bodyshop will provide these coats of paint with better anchoring on the part, preventing their cracking or detachment from the surface due to possible impacts, rubbing or vibrations. The following post will show you all the key aspects to consider when preparing and applying primer to plastic, taking as an example the process of repairing a new unprimed plastic part. You have surely wondered at some point how to apply plastic primer, or when to apply plastic primer or adhesion promoter to plastics. In some cases, this type of parts such as bumpers, mirrors or exterior mouldings can lack any primer, so a coat of primer will have to be applied to the plastic for the correct adhesion and behaviour of the paint. Replacing and painting plastic parts, whether new or repaired, is a common process in the workshop.
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