Adhesives

Dagobert Industrie stocks the industrial adhesives used in manufacturing, assembly and maintenance: structural adhesives, instant adhesives, anaerobic adhesives, hot melts, adhesive sealants and surface preparation products.

By technology

Which adhesive for which assembly

Three questions settle it, in this order.

1. Does the joint have to carry a load?

If it does, you need a structural adhesive: epoxy, two-part acrylic or two-part polyurethane. The other technologies hold a part in place, they do not make it work.

2. Do the two materials move in the same way?

Bonding aluminium to steel, or plastic to metal, raises a problem that adhesive strength does not solve: the two materials expand at different rates, and the joint absorbs the difference at every temperature change. You then need a flexible adhesive, hybrid or polyurethane sealant, and a bond line thick enough to deform.

3. How long do you need to position the parts?

An instant adhesive sets in seconds and allows no correction. A slow-cure epoxy leaves half an hour to adjust. Choosing an adhesive faster than necessary is the most common cause of a failed assembly.

The point everyone overlooks

When a bonded joint fails, the break almost always occurs at the interface between adhesive and substrate, not within the adhesive itself. The product is therefore almost never at fault: the surface preparation failed.

Degrease, abrade, degrease again. Three steps, in that order, with a clean single-use wipe. On difficult substrates, glass, baked paint, polypropylene, an adhesion primer is often the difference between a joint that holds and a joint that lets go in the first cold spell.

Brands in this category Official distributor
3M™BostikEleco PanacolHenkelSikaStik

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A question before ordering?

Any doubts about a part number or quantity? Our technicians are available to help at 04 50 52 70 89, and we provide quotes for bulk orders within 24 hours.

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Comment choisir sa colle

  • Les matériaux

    Métal, plastique, bois, verre ou caoutchouc : la colle doit être adaptée aux deux matériaux à assembler.

  • Le temps de prise

    Cyanoacrylate pour une prise en quelques secondes, époxy ou polyuréthane pour un temps de travail plus long et une grande résistance.

  • Les contraintes

    Résistance mécanique, température, humidité, vibrations ou souplesse du joint orientent le choix.

Questions fréquentes

Mono-composant ou bi-composant ?

Le mono-composant est prêt à l'emploi. Le bi-composant, mélangé au moment de l'usage, offre en général une résistance plus élevée.

Comment réussir un collage ?

Préparez les surfaces (nettoyage, dégraissage, éventuellement ponçage), respectez le temps ouvert et maintenez les pièces pendant la prise.

Quelle colle pour les plastiques difficiles ?

Certains plastiques comme le polyéthylène ou le polypropylène demandent une colle spécifique ou un primaire.

Puis-je obtenir un prix pour une grosse quantité ?

Oui. Avec un compte pro, vous bénéficiez de 5% de remise sur tout le catalogue. Pour des volumes importants, demandez un devis depuis votre espace pro ou contactez notre équipe.