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eBay£74.62Visit shop Octoral PF131 HS Primer Surfacer High Build 3Litre Grey 2K Polyurethane Filling
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The Octoral HS Surfacer Grey PF131 is a versatile 2K polyurethane high-filling primer designed for professional automotive refinishers and collision repair technicians. It delivers an exceptionally smooth, durable surface with superior sanding properties, making it ideal for preparing various substrates for topcoat application. While it offers excellent build and finish quality, users must carefully adhere to specific mixing ratios based on their chosen hardener to ensure optimal drying and adhesion.
| Colour | Grey |
|---|---|
| Model Part Number | PF131 |
| Brand | Octoral |
Yes, but for the best results and rust prevention, we recommend applying a layer of PW170 Washprimer before the PF131.
Yes, it can be applied as a non-sanding surfacer, which helps streamline the refinishing process.
When using HS420 hardener, the mix ratio is 6:1, followed by the addition of 25% Uni Thinner.
This is a 2K (two-component) polyurethane product, meaning it must be mixed with a hardener to cure.
Yes, as long as the existing paint system is in good condition, well-sanded, and thoroughly degreased.
Ensure the surface was sanded with the correct grit and thoroughly cleaned with a professional degreaser before application.
Verify that the mixing ratio is accurate for the specific hardener being used and ensure the shop temperature is within the recommended range.
Adjust the spray gun air pressure or fluid delivery, and ensure the correct amount of recommended Uni Thinner is added to improve flow.
Before application, ensure the substrate is thoroughly cleaned and degreased. For bare steel or aluminium, it is highly recommended to apply PW170 Washprimer first to maximize rust protection and long-term durability. Choose your mixing ratio based on your hardener: use 3:1 for 2K/MS hardener (+10% thinner), 4:1 for HS hardener (+15% thinner), or 6:1 for HS420 hardener (+25% thinner). Always store the product in a cool, dry place and ensure the lid is tightly sealed after use to prevent moisture contamination which can degrade 2K chemistry.
