U-Pol Smooth 7 Car Body Filler - SM/MB
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Product Information
Full details
The U-Pol Smooth 7 Car Body Filler is designed for professional automotive technicians and advanced DIY enthusiasts looking for a high-quality, easy-to-sand finish on vehicle panels. Its primary benefit is a superior, pinhole-free surface that significantly reduces preparation time before priming and painting; however, users should be aware that it requires precise mixing with the included hardener to ensure proper curing times.
All features
| Model Part Number | SM/MB |
|---|---|
| Brand | U-Pol |
Extended Product Information
FAQs
Can I use this filler on plastic bumpers?
This product is specifically designed for metal and rigid automotive substrates; it is not recommended for flexible plastic bumpers.
How long should I wait before sanding?
Depending on the temperature and the amount of hardener used, the filler is typically ready for sanding in 20-30 minutes.
What grit sandpaper should I start with?
Start with P80-P120 grit for shaping and move to P180-P240 for finishing before applying primer.
Is the mixing board dishwasher safe?
No, it is intended to be cleaned by scraping off cured material; exposure to high heat may warp the plastic.
Does this product require a specific type of primer?
It is compatible with most standard automotive 2K primer surfacers; always perform a test spot if using specialized coatings.
Troubleshooting
Filler is not hardening or curing.
Ensure the correct ratio of hardener was mixed into the resin. Check the ambient temperature, as very cold temperatures can significantly delay the curing process.
Pinholes appearing after sanding.
The filler was likely applied too quickly or with too much pressure, trapping air. Apply using lighter, more controlled strokes to ensure better surface contact.
Pros and Cons
Pros
- Provides an exceptionally smooth finish
- Easy to sand compared to standard polyester fillers
- Includes a reusable mixing board for convenience
- High-quality formula minimizes pinholes and surface imperfections
Cons
- Requires professional-grade knowledge of mixing ratios
- Faster cure times can be challenging for beginners in warm weather
- Does not include applicator tools other than the board
Setup, Compatibility & Care
To prepare, ensure the surface is clean, dry, and free of rust or grease by sanding with P80-120 grit abrasive. Always mix the filler and hardener on the provided board until a uniform color is achieved, avoiding air entrapment. Once applied, allow the filler to cure in a well-ventilated area away from direct sunlight. After use, scrape any excess cured material off the plastic mixing board to maintain a flat surface for your next repair job. Store the container in a cool, dry place and ensure the lid is sealed tightly to prevent the filler from drying out.