U-POL Body Filler Compound Repair Kit - P38 - P40
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Product Information
Full details
The U-POL Body Filler Compound Repair Kit is designed for automotive enthusiasts and DIY mechanics who need a professional-grade solution for repairing dents, scratches, and structural damage on vehicle bodywork. By combining the high-strength reinforcement of P40 Glass Fibre Repair Paste with the smooth, easy-sanding finish of P38 Multi-Purpose Body Filler, this kit provides a complete two-step repair workflow; however, users should note that as a 2K polyester system, it requires precise mixing with the included hardener and must be used in a well-ventilated area.
All features
| Model Part Number | P38/P40 |
|---|---|
| Brand | U-POL |
Extended Product Information
FAQs
Can I use P38 on plastic bumpers?
P38 is designed primarily for metal bodywork. Using it on flexible plastic bumpers may cause cracking.
How long does P40 take to dry?
Typically, the material will be ready to sand within 20-30 minutes, depending on the ambient temperature and the amount of hardener used.
Do I need to prime after using the filler?
Yes, once sanded smooth, the area should be cleaned and coated with an automotive primer to seal the filler before painting.
Can I store these tins after opening?
Yes, ensure the lids are pressed firmly shut to create an airtight seal; store in a cool, dry area.
Does this kit include the hardener?
Yes, the kit is designed to come with the necessary hardener components required for the 2K polyester reaction.
Troubleshooting
Filler is curing too fast to apply
Reduce the amount of hardener used in the mix, or mix smaller batches at a time.
Filler is not sticking to the panel
Ensure the surface is cleaned with a degreaser and sanded to bare, rough metal before application.
Surface is tacky after expected dry time
This is usually caused by an insufficient mixing ratio. Scrape off the tacky layer and re-apply with the correct hardener proportion.
Pros and Cons
Pros
- Comprehensive two-part repair system for both structure and finish
- P38 formula is specifically optimized for effortless sanding
- P40 provides high-strength, water-resistant structural reinforcement
- Excellent adhesion to automotive metal surfaces
Cons
- Requires manual mixing with hardener which demands a short working time
- Strong chemical odor necessitates use in well-ventilated areas
- Not suitable for use directly on top of loose rust or oil/grease
Setup, Compatibility & Care
Before starting your repair, ensure the metal surface is sanded down to the bare metal to guarantee proper adhesion. Never apply these fillers over existing paint that is loose or peeling. When mixing the hardener, ensure you follow the ratio instructions precisely; adding too much hardener can cause the filler to cure too fast, while too little may lead to a tacky finish that never fully hardens. After use, ensure the lids of the 250ml tins are sealed tightly to prevent the filler from drying out or hardening due to moisture exposure. Store the kits in a cool, dry place away from direct sunlight and heat sources.