Metal activity, joint, and cleanliness determine the hardening process.
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
First, check for contact with suitable metallic surfaces.
1 · Metal contact
Does the adhesive come into contact with suitable, uncoated metal surfaces?
Paint, coatings and passive metals can affect the hardening process.
Check material, surface activity and coatings.
For passive metals, check for a suitable activator such as A905 or ASC10 based on the product specifications.
2 · Joint gap
Does the actual gap lie within the product-specific limits?
Excessively large gaps and exposure to oxygen at the edge of a narrow joint can disrupt the reaction.
Measure tolerances instead of just using drawing values.
Compare current parts with previous components. Check the gap filling capacity in the specific TDS.
3 · Temperature
Does the actual processing temperature correspond to the specifications for the product?
Cold temperatures slow down many curing reactions. A thin layer of adhesive may cure more slowly than a larger, mixed quantity.
Measure the temperature of the material, component, and workplace.
Adhere to the specified waiting and curing times. Use heat only within the product-specific curing plan.
Consider pot life and time in the mixing nozzle separately from the time until load-bearing capacity.
Lumps or gel in the container: 3 test steps
Metal particles and unsuitable dosing parts can trigger a reaction in the material.
1. Contamination
Do the nozzle tip and material remain free from metal contact and particles?
Contact with metal surfaces or metal dust can contaminate the material.
Close the container after use.
Do not wipe the nozzle tip on the metal; check immersed parts and open immersion baths as sources of contamination.
2 · Dosing system
Are the containers, valves, immersion tubes and nozzles suitable for anaerobic products?
Metal parts in the dosing system can promote undesirable reactions.
Check all components that come into contact with the material.
Do not transfer the contents arbitrarily: The original packaging and its air space are part of the stabilization concept.
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.
Leaking pipe threads: 3 test steps
The contact zone, amount of adhesive, and achieved strength are crucial.
1 · Contact zone
Is there enough sealant where the mounted threads actually make contact?
In conical-cylindrical pairings, a job can only miss the contact zone at the very tip.
Check the order along the actual contact zone.
The guideline describes the application for A1058 on the external thread several threads behind the leading edge. Design the specific connection according to the product specifications.
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.
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.
Additional information from the source
Cold has a particularly strong effect on passive metals. The guideline mentions MH052 as a comparison to A1044 for cold stainless steel pipe connections; this is not a general substitution approval.
For very passive metals, the source mentions HM163 and HM135, among others; check product and application limits separately.
German version prepared according to the archived Permabond troubleshooting. Always compare product-specific values and procedures with the corresponding technical data sheet.
