Tetrosyl Ultrasmart 2K Fibrofil Metal & Glass Fibre Car Body Filler - 250g - 4 Pack
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Product Information
Full details
The Tetrosyl Ultrasmart 2K Fibrofil is designed for automotive professionals and serious DIY enthusiasts who need a robust solution for repairing holes and structural damage in vehicle bodywork. Its primary benefit is providing a high-strength, glass-reinforced finish that resists vibrations, though users must be careful to work quickly due to its fast-acting 5-to-10-minute setting time.
All features
| Model Part Number | TETUSF025PK4 |
|---|---|
| Brand | Tetrosyl |
Extended Product Information
FAQs
Can I use this filler on plastic bumpers?
No, this product is specifically formulated for metal surfaces. Use a dedicated plastic bumper repair filler for flexible components.
What is the recommended sanding process?
Start with P80 grit for initial shaping once cured, then follow up with a finer grit like P180 or P240 to smooth the transition area.
Can I apply paint directly over the filler?
No, you must apply a high-build primer over the sanded filler to seal it before applying base coats or lacquers.
How long does it take to fully set?
At 20 degrees Celsius, it sets in 5-10 minutes and is ready to be sanded after 20 minutes.
Is it suitable for use in a spray booth oven?
Yes, this product is designed to be compatible with low-bake oven systems operating at 80 to 90 degrees Celsius.
Troubleshooting
Filler remains tacky and does not harden
The mixing ratio of hardener was likely too low. Always ensure a 98:2 ratio.
Pinholes appearing in the cured surface
This is caused by trapped air. Apply the filler with firmer pressure and avoid over-mixing during the preparation phase.
Filler is pulling away from the metal
The substrate was likely contaminated. Ensure the metal is completely clean, dry, and sanded to a rough texture for better mechanical bond.
Pros and Cons
Pros
- Excellent structural strength for large holes
- Highly resistant to cracking from vibration
- Compatible with most automotive paint systems
- Fast cure time increases shop productivity
Cons
- Short working time requires precise mixing
- Requires careful preparation of the substrate to avoid rust
- Must follow exact 98:2 mixing ratio for proper curing
Setup, Compatibility & Care
Before applying the filler, ensure the vehicle panel is completely dry and free from contaminants like oil or wax. If rust is present, treat the metal with a rust converter first. The filler is compatible with most automotive paint systems, but it should always be topped with a suitable primer to seal the porous surface of the glass fibers. Store the containers in a cool, dry place away from direct sunlight to maintain the integrity of the polyester resin. Always ensure the hardener cap is tightly sealed after every use to prevent moisture contamination.