Revolution in manufacturing:
Bond it first, then weld it!
With a high-temperature-resistant epoxy adhesive, welding after bonding is now possible for the first time – safely, efficiently and without loss of strength, as tested at a leading research institute.
Until now, the rule was clear: welding destroys any bond.
For decades, industry assumed that the heat from welding would burn the adhesive and weaken the joint. Research has now proven otherwise, overturning this long-held belief.
The goal of the project was to better understand bonded stiffening profiles for flat components in maritime structures.
The breakthrough: it works.
Together with the research institute, welding was carried out on pre-bonded samples – with a striking result: the bond remained virtually unaffected, even when welding was performed in close proximity. This opens up entirely new possibilities for modern manufacturing processes.
The decisive factor:
the right adhesive
Not every adhesive can withstand the extreme heat of welding. To combine bonding and welding, the adhesive must:
have high temperature resistance.
withstand short-term exposure to heat (from the welding process).
withstand short-term exposure to heat (from the welding process).
The tests show: an epoxy adhesive with excellent temperature resistance is the key.
The key to the solution:
WEICON Easy-Mix HT 180
This is a two-component epoxy adhesive, developed for the most demanding industrial and manufacturing applications.
(€63.78* / 100 ml)
Test series at the research institute
To examine the adhesive’s load-bearing capacity, three scenarios were investigated:
Weld 1 – directly over the bond
When a weld is placed directly over the bond, following its path, the adhesive is exposed to temperatures exceeding +1000 °C. As expected, this destroys the bond, leaving less than 10% of the original strength intact.
Weld 2 – in close proximity to the bond
When a weld is placed near the bond, the adhesive is exposed to significant heat stress. Thanks to the excellent temperature resistance of Easy-Mix HT 180 and the short exposure time, the bond remains completely intact.
Weld 3 – through the bond
When a weld is made into or through a bond, the high local temperatures destroy the adhesive directly beneath the weld seam. Thanks to the outstanding temperature resistance of Easy-Mix HT 180 and the brief heat exposure, the bond in the immediate vicinity remains undamaged and can still transmit around 85% of its original strength.
New possibilities in manufacturing
The high temperature resistance of WEICON Easy-Mix HT 180
allows manufacturing processes to be much more flexible:
✓ combine bonding and welding – without any loss of quality
✓ assembly-friendly production – bond it first, then weld it
✓ ✓ expand material combinations – metal, aluminium, composites
✓ ✓ reduce effort – less clamping and fixturing work
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Application examples
✓ welding holders onto bonded housings afterwards
✓ ✓ combining bonding and welding in aluminium and steel profiles
✓ repairing structural joints with local re-welding
Typical areas of use
Machinery and plant engineering
Automotive and commercial vehicle manufacturing
Marine industry
Metal processing
Apparatus engineering
Energy and environmental technology
Support & contact
Discover how to safely combine bonding and welding. Our application engineers provide advice individually tailored to your project.
