Too much adhesive, dry surfaces, or fumes are common causes.
Product and application
Select the system so that only relevant test steps appear. If no system is specified, the test will remain general.
01
What are you observing?
02
Identify the cause
03
For reference
All test steps in this guide can be used even without the guided process.
Terms briefly explained
Hand strength
The parts should be handled carefully. The connection is not yet fully load-bearing.
Complete curing
The curing conditions and times prescribed for the product were adhered to.
Adhesive gap
Distance between the two joining surfaces, not the length of the adhesive seam.
Pot life and nozzle life
Test the processability of a mixed quantity and the processability in the mixing nozzle separately.
Does not harden or hardens too slowly: 3 test steps
Start with the amount of adhesive and the actual gap.
1 · Quantity & Gap
Is the adhesive layer thin and the joint closed within the product boundaries?
Too much superglue does not speed up the hardening process. Excess glue can remain liquid.
Dose sparingly and check the gap against the specific TDS.
Assess excess material and hardening within the joint separately. Use a suitable activator only according to the product instructions.
2 · Moisture & Surface
Are the humidity and surface conditions suitable for the chosen type?
Very dry or acidic surfaces, as well as cold, dry workspaces, can slow down the reaction.
Measure humidity and temperature.
Check for a suitable activator or a faster-curing or less surface-sensitive type.
3 · Storage
Has the material been stored within its shelf life and according to the data sheet?
Aging, humidity, separation of components or unsuitable temperatures can alter processing and hardening.
Record batch number, expiry date and inventory history.
Check for segregation, thickening, and contamination. Do not correct conspicuous material with unauthorized additives.
If the material quality is unclear, check a fresh, correctly stored batch for comparison.
White coating on component 3 test steps
The deposit known as efflorescence occurs when adhesive vapor reacts with moisture on the surface.
1 · Dosage
Is the dosage applied without unnecessary excess?
More exposed material can generate more steam.
Reduce the amount of adhesive and make the application repeatable.
2 · Handling
Do cleaned surfaces remain free of fingerprints?
Moisture from the fingers can promote blooming.
Avoid touching components after preparation; use suitable gloves.
3. Ventilate
Can the parts air out sufficiently before packaging?
Immediate sealing of the packaging keeps fumes away from the components.
Do not pack airtight immediately after gluing.
If necessary, test a low-blooming type such as the 940 series or CSA-NF mentioned in the guide for suitability.
Stress cracks in plastic: 3 test steps
Uncured adhesive and unsuitable activators can exacerbate the problem.
1. Hardening
Does the adhesive cure quickly and completely?
Prolonged exposure to uncured material can damage sensitive plastics.
Remove excess promptly and try a faster-curing type.
2 · Activator
Has an activator system suitable for the sensitive plastic been tested?
The guideline explicitly distinguishes CSA-NF from standard CSA, which can exacerbate stress cracking.
Do not use standard CSA as a replacement without prior testing.
Test CSA-NF or a fast-curing, correctly mixed 2K system with the application technology.
3 · Surface
Are the actual materials clean, dry, and properly prepared?
Oil, release agents, varnishes, and weak oxide layers can impair adhesion. Changing suppliers can also alter the surface.
Determine the material and alloy or plastic mixture. Ask the supplier about any changes to release agents, plasticizers, and coatings.
Adjust the cleaning process to the material and allow the cleaning agent to evaporate completely. Check the blasting media for cleanliness and condition.
Apply adhesive promptly after pretreatment and avoid further contact or oxidation. If necessary, test wettability using suitable testing methods.
Does it become thick or change color? 2 test steps
Aging can alter viscosity. Slight discoloration alone does not necessarily indicate a loss of strength.
1 · Storage
Has the material been stored within its shelf life and according to the data sheet?
Aging, humidity, separation of components or unsuitable temperatures can alter processing and hardening.
Record batch number, expiry date and inventory history.
Check for segregation, thickening, and contamination. Do not correct conspicuous material with unauthorized additives.
If the material quality is unclear, check a fresh, correctly stored batch for comparison.
2 · Condensation
Is refrigerated material brought to room temperature before opening?
Condensation inside the container accelerates premature aging.
Keep the container at a controlled temperature and adhere to the storage conditions specified in the TDS.
Protect from sunlight and moisture; check for changes in flow and dosing behavior.
Disturbing Odor 1 Test Steps
Capture vapors as close as possible to where they originate.
1 · Extraction
Is the steam effectively removed from the workplace?
Airflow and local extraction affect exposure.
Check workplace extraction and airflow.
Check a low-odor type for the required properties; any change must be suitable for the application.
Insufficient strength: 3 test steps
First, define the fracture pattern and then examine the surface, application, and load.
1 · Surface
Are the actual materials clean, dry, and properly prepared?
Oil, release agents, varnishes, and weak oxide layers can impair adhesion. Changing suppliers can also alter the surface.
Determine the material and alloy or plastic mixture. Ask the supplier about any changes to release agents, plasticizers, and coatings.
Adjust the cleaning process to the material and allow the cleaning agent to evaporate completely. Check the blasting media for cleanliness and condition.
Apply adhesive promptly after pretreatment and avoid further contact or oxidation. If necessary, test wettability using suitable testing methods.
2 · Order & Fixing
Is sufficient adhesive applied to the correct area and is the joint held still during the curing process?
Gaps in the order, incorrect contact points, and movements during curing can explain local failures.
Check the dosage and actual wetting of the contact surface.
Maintain fixation until the required strength is achieved; pay attention to air gaps and torn structures.
Document the error rate and distribution. Individual failures may indicate fluctuating process conditions.
3 · Load
Is the bond only subjected to stress within its operating conditions after sufficient curing?
Premature stress, peeling forces, media, or differing thermal expansion can weaken a connection that initially appears to be good.
Compare the waiting time before loading with the product data sheet.
Capture joint geometry, temperature, chemicals and humidity in real-world use.
For peeling loads or different materials, test tougher or more flexible systems with the application engineer.
German version prepared according to the archived Permabond guide troubleshooting-cyanoacrylates.md. Always compare product-specific values and procedures with the corresponding technical data sheet.
