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Priming

Primers enhance material bonding performance. Techsil supply a variety of primers to compliment our range of adhesives and sealants.

Primers are designed to improve the effectiveness of adhesives and are used to pre-treat substrates that are about to be attached together. Priming is particularly popular with porous surfaces that may otherwise absorb the adhesive and is often used in very low temperature situations. Many of the strongest adhesives are designed to work with virtually any surface, but different conditions can affect performance and this is where primers come in, preparing surfaces to ensure adhesives deliver a powerful bond.

The amount of coverage provided with a given amount of primer will vary depending on the porosity and smoothness of the substrate. Rougher substrates should be smoothed as much as possible with a patching and levelling compound. The compound should be dried and cured according to manufacturers’ recommendations before adhesive primer is applied.

The complete range of priming materials offered by Techsil is used extensively across different industries and applications, valued for their ability to enhance material bonding performance and productivity.

Typical Applications of Priming

Used across the aerospace, automotive, general manufacturing industries, primers enable adhesion on a wide variety of substrates and applications.

Examples of typical uses and benefits include:

  •    -   Enables adhesion of difficult-to-bond plastics such as polypropylene, polyethylene and silicone rubber
  •    -   Enables adhesion on similar and dissimilar materials
  •    -   Improves bonding to metals, woods and unglazed ceramics
  •    -   Helps prevent discolouration of substrates
  •    -   Easier handling
  •    -   Low processing costs

 

Key Characteristics of Priming Materials

  •    -   Increases surface energy
  •    -   Ready-to-use
  •    -   Transparent, opaque or coloured
  •    -   Chemical and moisture resistance
  •    -   Corrosion resistance
  •    -   Can be poured, brushed or sprayed

 

Tips for Application

The area that will be primed with adhesive primer should be ready to go before the primer is applied to the substrate. This means that the area to be primed, the primer, and the adhesive should be kept at or above 65°F (18.3°C) for at least 48 hours before and 48 hours after the primer and adhesive are installed. This will ensure that the primer dries evenly, and that the adhesive itself will dry correctly. Warm materials bond to adhesive more readily than do cold materials. That is why the surface must be acclimated as well.

Before adhesive primer is applied, the user should be sure the substrate is clean. This means that it is free of any kind of surface contaminants that will prevent the adhesive primer from working at its ideal level. Any dust, dirt, wax, polish, paint, oil, grease, or other contaminants that will interfere with effective material bonding should be removed. The substrate must also be in good, usable condition, and be relatively smooth and dry. When applying adhesive primer, a short nap paint roller or a coarse fibre brush should be used. If puddles form during application, they should be rolled or brushed through so they will not become a bonding issue when the adhesive is applied. Adhesive primer should be used at full strength, and tools can be cleaned with warm water.

 

 

 

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