Grade reference
PRIMEX S 6658
All grades · sourced from VESTOLIT (Orbia) · checked 19 August 2026
- Producer
- VESTOLIT (Orbia)
- Polymer
- PVC
- Type
- Suspension resin
- K-value
- 66
- Producer lists it for
- Films and sheets · Pipes · Technical profiles · Window profiles
What that means in practice
The tightest of the three K66 grades — pipe, technical and window profile only, no flooring or medical. A narrow list usually signals a resin tuned for one job rather than spread across several, which is a point in its favour if that job is yours.
If K-values are not something you work with daily, our PVC grades and pricing guide explains what they measure and how prime, off-spec, regrind and regranulate differ.
What to check before buying PRIMEX S 6658
- K65 is the most traded band, which means it is also the band where 'general-purpose PVC' gets used loosely. Get the actual grade name.
- For pipe and conduit work, ask whether the material is prime, near-prime or off-spec, and what the deviation is if it is off-spec.
- Check the packaging and storage history — suspension resin is a powder and it picks up moisture.
Buying or selling this?
Browse the board to see what is listed today — public, no account needed. Nothing matching? Post a Wanted requirement with the grade and tonnage you need and sellers come to you. Selling it? List it — free, no commission.