At a glance

HDPE is the most economical tank material for Tannic Acid, rated Excellent. Polypropylene and PVDF (Kynar®) are also rated Good or better. Rated Fair (contact us before use): nylon tanks and aluminum hardware.

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 Tannic Acid works with the plastics used to make our storage tanks.

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

Fittings

How Tannic Acid works with the plastics used for tank fittings.

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

Gaskets & O-Rings

How Tannic Acid works with gasket and O-ring materials.

Material	Rating
Buna-N	Excellent
EPDM	Excellent
Viton®	Excellent

Metals

How Tannic Acid works with the metals used for fittings and bolts.

Material	Rating
316 Stainless Steel	Excellent
Hastelloy	Good
Titanium	No Data
Aluminum	Fair