What glue is best for bonding car bumpers?

[MelanieFitz]

Using AB glue is recommended for bonding car bumpers. The application method for AB glue is as follows: 1. At room temperature (25°C), clean the surfaces to be bonded. Then apply A glue and B glue in a 1:1 ratio by either overlapping application or applying A glue to one surface and B glue to the other before joining them together. Perform 2-3 alignment adjustments before fixing for 5-10 minutes. 2. At room temperature (25°C), clean the surfaces to be bonded. Then mix A glue and B glue in a 1:1 ratio using a plastic mixing sheet and apply to the bonding surfaces within 3 minutes. Fix for 5-10 minutes. 3. Note: Do not mix large quantities of glue at once during use, and ensure good ventilation. The glue contains acrylate odor - do not ingest.

[AlanaRose]

When it comes to bonding car bumpers, I often do DIY repairs and find two-component epoxy adhesive the most reliable. It has super strong adhesion and is resistant to water or high temperatures. I've tried regular glue before, but it cracked soon after – bumpers are mostly made of plastic, like ABS material, and ordinary glue just can't hold. During operation, you need to clean the surface first, wipe off grease with alcohol before applying the adhesive, and press for a few minutes to let it cure. If you're fixing small cracks, epoxy can handle major issues; but for large breaks, you might need to add mesh reinforcement. I recommend keeping these tools at home to save unnecessary repair shop expenses, but remember not to get the adhesive on your skin – wearing gloves is safer. Lastly, a good adhesive only costs a few dozen bucks, offering great value for money.

[VanAngelina]

When repairing cars, I often help owners with bumper issues, recommending automotive-specific structural adhesives like 3M's polyurethane type. These adhesives are designed for plastic characteristics, resisting vibration and UV rays, unlike DIY adhesives that tend to fail easily. Before bonding, it's essential to sand the surface to increase adhesion, apply the adhesive evenly, and press firmly overnight. Key reminders include: choosing the right adhesive based on the bumper material, as different plastics like polypropylene require different adhesives; otherwise, it won't stick properly and may damage the surface. I've seen owners use the wrong adhesive, leading to post-repair detachment and wasted effort. The operation is straightforward, usually achieving initial solidification within 30 minutes, but it's necessary to check if the joint is well-sealed to avoid water seepage and corrosion.

[MacBenjamin]

I think ordinary car owners can just use double-sided tape when sticking on a bumper. It has good adhesion, is easy to tear off, and allows for redoing if unsatisfied. The operation is super simple: clean the bumper, stick it on, and press firmly for a few minutes. But don’t expect a permanent fix—large cracks or detached parts still require replacement or professional help; tape is only suitable for temporary patches. I’ve tried it and found that the adhesive strength decreases at high temperatures, and if the plastic deforms from heat, it becomes troublesome. Related thoughts: it’s convenient but less safe than specialized adhesives—if the car vibrates heavily at high speeds, a falling bumper could be terrifying. Beginners are advised to start with basic tape for practice, then advance after understanding material properties.