Roberlo Multiextender Stopper Body Filler - 1.5Litre
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Product Information
Full details
The Roberlo Multiextender Stopper Body Filler is an all-purpose, lightweight polyester filler designed for automotive body repair professionals and serious DIY enthusiasts. It excels at smoothing out dents, rust spots, and small holes to prepare panels for a final paint finish. While it offers excellent application properties and easy sanding, users should note that as a two-part system, it requires precise mixing with a hardening agent to ensure proper curing and structural integrity.
All features
| Model Part Number | Roberlo Multiextender Stopper Body Filler 1.5Litre |
|---|---|
| Brand | Roberlo |
Extended Product Information
FAQs
Can I use this filler on plastic bumpers?
This product is primarily designed for metal automotive body panels. For plastic repairs, use a specialized flexible plastic filler.
How long does it take to sand?
Depending on the temperature and amount of hardener used, it is typically sandable within 20-30 minutes.
Can I apply paint directly over the filler?
No. You should always apply a high-quality primer-surfacer over the sanded filler before applying color to ensure proper adhesion and a uniform surface.
Does this filler shrink over time?
The lightweight formula is designed for minimal shrinkage, but ensure it is fully cured before priming to prevent issues.
Is a specific hardener required?
Yes, always use the hardener recommended by the manufacturer to ensure the chemical reaction occurs properly.
Troubleshooting
Filler is not curing or staying tacky
Ensure the ratio of hardener is correct. Insufficient hardener will prevent curing, while cold ambient temperatures may significantly delay the process.
Filler pulls or drags during application
Ensure the surface is clean and free of moisture or contaminants. If the temperature is very hot, mix smaller batches to maintain a workable consistency.
Surface pinholes appear after sanding
Apply the filler with firmer pressure to force it into the substrate and avoid air pockets. Use a high-quality spreading tool to smooth the surface in one direction.
Pros and Cons
Pros
- Extremely easy to sand once cured
- Lightweight composition prevents sag during application
- Highly versatile for various types of automotive body damage
- Provides a very smooth, pinhole-free finish
- Excellent for both professional workshops and home garages
Cons
- Requires precise mixing ratios with hardener
- Short working life once the hardener is mixed
- Requires proper surface preparation for optimal results
- Not intended for deep structural reconstruction without support
Setup, Compatibility & Care
To ensure the best results, start with a clean, dry surface sanded to remove any loose rust or paint. Always mix the filler with the appropriate amount of hardener on a non-porous mixing board; use a clean spreader to combine the components thoroughly until the color is uniform. Avoid mixing more product than you can apply within 5-10 minutes, as the filler will begin to harden rapidly. Once the repair is cured and sanded, wipe the surface clean with a degreaser before proceeding to primer application. Store the container in a cool, dry place with the lid tightly sealed to prevent the polyester resin from drying out or degrading.