Octoral PF131 HS Primer Surfacer with Fast Hardener Kit - PF131G-3

While it provides good adhesion, it is best practice to apply a dedicated wash primer or epoxy primer to bare metal surfaces first for maximum corrosion protection.

Due to the fast hardener, the pot life is limited. Refer to your specific kit instructions, but generally, expect to use the mix within 30-45 minutes.

The product is designed for optimal performance as-is, but a small amount of Octoral-approved thinner may be used if viscosity adjustments are necessary for your specific spray gun setup.

Yes, provided a plastic adhesion promoter is applied to the bumper first to ensure proper bond.

For sanding, start with P400 for initial leveling and finish with P600 for a surface ready to receive basecoat.

For filling applications, 2 to 3 medium-wet coats are typically sufficient, allowing for proper flash time between coats.

Ensure the product has fully cured based on the recommended drying times; avoid sanding if the surfacer is still tacky.

Thoroughly clean the substrate with a high-quality degreaser to remove all traces of oil, silicone, or contaminants.

The fast hardener reduces pot life significantly; ensure you are mixing only what you can spray within the allotted time.