Grade reference
Westlake 5385
All grades · sourced from Westlake Corporation · checked 19 August 2026
- Producer
- Westlake Corporation
- Polymer
- PVC
- Type
- Suspension resin
- K-value
- 65
- Inherent viscosity
- 0.90 dl/g
- Producer lists it for
- Pipe · Siding · Window · Door · Fence lineal products
What that means in practice
The 5000-series equivalent of 1091 — identical K65, IV 0.90 and application list. Westlake run parallel series at several points in the range, so if you are quoted one against the other, the published data will not separate them.
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 Westlake 5385
- 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.