Octoral HS Primer Surfacer - White - 3.5L
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Product Information
Full details
The Octoral PF131 + H24 White HS Primer Surfacer is designed for professional automotive refinishing technicians who demand high-build quality and versatile application methods. Its primary benefit lies in its exceptional filling capacity and superior sanding properties, which significantly reduce labor time during surface preparation. However, users should note that as a 2K polyurethane system, precise mixing ratios with the included fast hardener are critical to ensure proper curing and substrate adhesion.
All features
| Colour | White |
|---|---|
| Model Part Number | PF131W-3 |
| Brand | Octoral |
Extended Product Information
FAQs
Can I use this on plastic bumpers?
Yes, but you must use a suitable plastic adhesion promoter on bare plastic before applying the primer.
Is this a single-stage product?
No, this is a 2K (two-component) system that requires a hardener to cure.
What is the primary benefit of the 'White' color?
The white shade is ideal for supporting light-colored topcoats, which helps achieve full opacity (hide) faster and reduces the amount of basecoat required.
How long do I wait before applying color over the WOW application?
Follow the flash-off time specified on your technical data sheet, typically ranging from 15 to 30 minutes depending on ambient temperature.
Does this primer provide rust protection?
While it has some resistance, it is not a direct-to-metal (DTM) primer. Always use an epoxy or etch primer on bare steel first.
What happens if I don't use the fast hardener?
Using the wrong hardener or failing to use one will prevent the primer from curing, resulting in a soft, non-sandable finish.
Troubleshooting
Poor sanding properties or clogging
Verify the mixing ratio is correct and that the product has achieved a full cure time before beginning to sand.
Pinholes appearing in the primer
Ensure the substrate was properly degreased and that ambient humidity levels are within the manufacturer's recommended range during application.
Surface feels tacky after long periods
Check the mixing ratio of the fast hardener; improper ratios often lead to incomplete cross-linking.
Pros and Cons
Pros
- Excellent build quality covers minor irregularities
- Time-saving wet-on-wet application capability
- Easy to sand once fully cured
- Professional-grade durability
- Optimized for light-colored paint systems
Cons
- Requires precise 2K mixing equipment
- Fast cure window requires quick application
- Strict PPE requirements for isocyanate-containing products
- Not suitable for use on untreated raw plastic without proper adhesion promoters
Setup, Compatibility & Care
To ensure optimal performance, the Octoral PF131 must be mixed with the H24 Fast Hardener strictly according to the technical data sheet ratios. Use a dedicated mixing cup to maintain accuracy.
- Equipment: Standard HVLP or compliant spray guns with a 1.4mm - 1.8mm nozzle are recommended.
- Compatibility: Ensure the substrate is properly cleaned and degreased before application. If applying over bare metal, ensure an etching or epoxy primer is applied first to prevent corrosion.
- Care: Clean all spraying equipment immediately after use with a high-quality gun cleaner, as 2K polyurethane products will harden permanently inside the fluid passages if left to sit.