Author: Craig Hallsworth

Whether you’re using our Tensorgrip 22L spray canisters or the handy 500ml aerosols, Indasol’s range of joinery adhesive has superb performance compared to other products on the market. Even so, while our Tensorgrip spray adhesives are developed for superior performance, the success of the final results can depend on a number of factors. In this guide, we look at how the spray nozzle selection can affect your results.

The spray gun features a nozzle at its tip which is used to distribute adhesive over your chosen surface. Before starting on your project, it would be a good idea to familiarise yourself with the various nozzles available, and understand how each one can provide certain advantages depending on the material you are working with.

What spray nozzles are available and what are the differences between them?

Let’s start by taking a look at our range of nozzles for Tensorgrip adhesives. We offer five different options, each designed for a specific bonding task and delivering a distinct viscosity or spray angle, making your nozzle choice of crucial importance. The five available nozzles are:

• The 4001 Nozzle
• The 6501 Nozzle
• The 9501 Nozzle
• The 8002 Nozzle
• The Lechler Nozzle

The initial 2 digits of the nozzle code above (40, 65, 95 and 80) correspond to the spray angle of your adhesive. The subsequent digits denote the size of the nozzle itself. For example, the Lechler Nozzle lies between 6401 and 9501 regarding size and spray pattern, while the 8002 Nozzle is recommended for spraying thicker adhesives, particularly PU adhesives.

Why Does Your Nozzle Choice Matter?

Our spray adhesive nozzles have been designed to perform on various substrates and joinery bonding tasks, and your choice of nozzle can make a considerable difference.

Firstly, if you’re switching between different adhesives, it’s crucial not to assume that you won’t need to change nozzles. Always confirm you have the appropriate nozzle to maximize your TensorGrip adhesive’s performance.

Secondly, remember that changing from a web spray to a mist spray will require a different nozzle. This is because mist spray adhesives have a lower viscosity, and the 4001 mist spray nozzle has a smaller hole to produce the fine mist droplet pattern. Moreover, the mist spray nozzle includes an insert that prevents dripping when the trigger is released, which is particularly useful when working with high gloss finishes.

What Are The Potential Pitfalls?

• Inaccurate Spray: An incorrect nozzle can result in a faulty spray. Signs of a wrong nozzle selection often include sputtering and uneven spray.
• Dripping: Selecting an inappropriate nozzle can lead to adhesive dripping, a problem when aiming for a high-gloss finish.
• Telegraphing: Incorrect nozzle use can lead to ‘rippling’ or the creation of an undesired texture resembling an orange peel

When working with adhesives or any bonding product, it is vital that the surface is cleaned correctly. Each surface needs to be free from dirt, grease and contamination prior to bonding. In some cases a primer may be required and it is critical that the correct primer is used. It may also be the case that light abrasion is required to help the bonding product key into the surface. Due to the changing raw material content and surface finishes of some substrates, it is essential that all of our adhesives should be tested by the customer to ensure substrate and performance compatibility for each application. Please contact us for any advice.

For expert help on choosing the correct Tensorgrip spray nozzle for your bonding project, please contact us today.