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Seal Compatibility

August 2, 2021
Posted by Dura123

How to Choose the Right Seal for Your Herbicide Pump or Flow Meter


Confused as to which seal you should consider for your herbicide pump or flow meter to achieve chemical seal compatibility?


Dura Products offers 3 unique Seal types for our Dura-Pump™, Dura-ABS™Auto Batch System and Dura-Meter™ :  EPDM, VITON® & SILICONE.


EPDM seals are good in steam applications and offer excellent chemical resistance to a variety of acids and alkalines.  While fairly good in ketones and alcohols, EPDM is not recommended for use in applications involving petroleum oils, strong acids, or strong alkalines. They have exceptionally good weather aging and ozone resistance. Temperature rating is from -20ºF to +225ºF (250ºF intermittent service).


Viton® seals have excellent chemical resistance. They can be used in most applications involving mineral acids, salt solutions, chlorinated hydrocarbons and petroleum oils. They are particularly good in hydrocarbon service. Not suitable for steam or hot water service. Temperature rating is from -20°F to +300°F.


Silicone seals are recommended for the following products:  Accord®, Accord® XRT II, Ammonium Sulfate, Duramax®, Durango®, Enlist Duo®, Garlon® 3A, Instinct®, Intimidator®, Keystone®, Keystone® LA, Matador®, Resicore®, SureStart®, SureStart® II, Surpass® EC


Proper chemical seal compatibility can extend the life of your pump or meter’s performance.  Please see our Seal Compatibility Chart below for reference.  If you are using products that are not shown on the chart, let us know and we will have our tech support research the best seal type with the chemical manufacturer.



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