At a glance

Polypropylene is the most economical tank material for Caustic Soda (80%), rated Excellent. PVDF (Kynar®) is also rated Good or better. Avoid titanium hardware. Rated Fair (contact us before use): HDPE and nylon tanks; HDPE fittings.

Excellent No or minor effect. Recommended.
Good Slight effect. Generally suitable.
Fair Moderate effect. Limited or conditional use — contact us.
Not Recommended Severe effect. Do not use.
No Data Not tested. Contact us before use.

Tank Resins

How Caustic Soda (80%) works with the plastics used to make our storage tanks.

Material	Rating
HDPE	Fair
Polypropylene	Excellent
Nylon	Fair
PVDF (Kynar®)	Excellent

Fittings

How Caustic Soda (80%) works with the plastics used for tank fittings.

Material	Rating
HDPE	Fair
PVC	Excellent
CPVC	Excellent
Polypropylene	Excellent
PVDF	Excellent

Gaskets & O-Rings

How Caustic Soda (80%) works with gasket and O-ring materials.

Material	Rating
Buna-N	No Data SEVERE EFFECT
EPDM	Good
Viton®	No Data SEVERE EFFECT

Metals

How Caustic Soda (80%) works with the metals used for fittings and bolts.

Material	Rating
316 Stainless Steel	Good
Hastelloy	Excellent
Titanium	Not Recommended
Aluminum	No Data