5 Common CPW Buyer Mistakes and How to Avoid Them.
Choosing the right Chlorinated Paraffin (CPW) is more than a technical decision — it can affect the quality, compliance, and cost-efficiency of your entire production. Over the years, we at Suntek have worked closely with CPW buyers across cable manufacturing, PVC compounding, and rubber extrusion industries. And we’ve noticed one thing: a few common mistakes keep repeating — and they’re avoidable.
In this blog, we’re pulling the curtain back. Whether you’re buying in bulk or planning your next supply contract, make sure you’re not falling into these traps.
❌ Mistake 1: Not Verifying CPW Chlorine Percentage — A Common CPW Buyer Mistake
Many buyers assume that the label on the drum tells the full story. It doesn’t. Some manufacturers will claim a CPW grade as “52% chlorine” but deliver 55% — which alters plasticizer performance, affects flexibility, and can even impact compliance in flame-retardant applications.
✅ What to do:
Always ask for a recent TDS and verify chlorine percentage
Run a density check; even a 2–3% difference can affect cost and application
Understand your use-case: Flame resistance needs higher Cl, but extrusion prefers balanced Cl levels
❌ Mistake 2: Ignoring CPW Viscosity — Avoid This Common CPW Buyer Mistake
Not all CPW is created equal when it comes to viscosity. A higher viscosity can affect blending, increase processing time, or even damage your equipment if not calibrated.
✅ What to do:
Check viscosity in centipoise (cP) at 25°C
For cable sheathing, go with medium viscosity CPW
For flexible film, opt for low viscosity grades
At Suntek, we allow viscosity customization per batch — make sure your supplier offers the same.
❌Mistake 3: Buying CPW Without MSDS or Test Reports
Safety is often overlooked in the race for pricing. But if your CPW contains impurities or has an unstable formulation, it could become a compliance liability.
✅ What to do:
Ask for a Material Safety Data Sheet (MSDS)
Ensure your supplier follows ISO, BIS, or RoHS standards
Suntek’s CPW comes with batch-wise MSDS and third-party quality testing on request.
❌ Mistake 4: Not Checking Zero-Discharge Manufacturing for CPW
Sustainability is now more than a buzzword — it’s a buyer’s requirement. Many countries ban or heavily tax products that aren’t responsibly manufactured.
✅ What to do:
Ask whether the plant follows a zero-discharge policy
Confirm if water and chlorine recovery systems are installed
Look for certifications: Suntek operates with zero water discharge and closed-loop chlorine systems
❌ Mistake 5:Focusing Only on Price When Buying CPW
Price matters — but it shouldn’t be the only factor. A cheaper CPW batch that fails under heat or during extrusion can cost you more in returns, customer complaints, and compliance penalties.
✅ What to do:
Compare TDS vs MSDS vs performance trials
Factor in yield, not just cost per kg
Always ask: “What grade of CPW is right for my product line?”
Bonus Tip: Density Check Is Your First Defense
One quick way to spot a misrepresented CPW is to measure its density. For example, 52% Cl CPW should have ~1.25–1.27 g/cm³. If you’re getting 1.30+ g/cm³, it’s likely 55% or improperly blended.
This is a crucial tip from our founder:
“Often customers are given 55% instead of 52%, which may seem harmless — but it changes density and pricing significantly. Always check material density at the time of receiving.”
Choose Suntek – Trusted by Exporters, OEMs & B2B Leaders
Suntek’s CPW production is backed by:
✅ Custom Cl % and viscosity per customer
✅ ISO-compliant testing and traceability
✅ Zero discharge manufacturing
✅ Export-ready drums and documentation
Let’s Talk:
Planning a CPW bulk order? Let’s get your sourcing right from Day One.
📩 Email: HQ@thesuntek.com
📞 Call: +91 84477 90110
🌐 Visit Our Website
