• Teatseal is a sterile, non-antibiotic intra-mammary infusion in the form of a viscous white paste.
  • Teatseal is an inert substance containing 65% bismuth subnitrate in a paraffin base.
  • It provides a physical barrier before the keratin plug in the teat canal has formed and after it has broken down, preventing the entry of pathogens into the udder during the early and late dry period.

Recommendations for Use

  • Teatseal is indicated for the prevention of mastitis in dairy cows during the non-lactating (dry) period and early post-calving.

The Zoetis Advantage 

  • The formation of this physical barrier acts to prevent mastitis in the dry period and early post-calving.
  • In cows that are being dried off, Teatseal can be administered concurrently with a dry cow antibiotic.
  • When Teatseal is used at the same time as a dry cow antibiotic, it has been shown to cut the number of mastitis cases in early lactation by up to 70%, compared to when a dry cow antibiotic is used alone.
  • In known low cell count cows where dry cow antibiotic may not be warranted, Teatseal can be used as the sole intramammary infusion.
  • In maiden heifers pre-calving, Teatseal can be administered 4 weeks prior to first calving.
  • Every cow is at risk of mastitis. As Teatseal is a mastitis preventative, it is relevant to every herd situation. Teatseal can prevent mastitis:
  • If you use blanket dry cow antibiotic therapy or selective dry cow antibiotic therapy
  • In low cell counts cows, in high cell count cows and in maiden heifers
  • Teatseal can persist for up to 100 days after dry off.


Use one complete syringe per quarter



  • Teats should be clean and dry. If teats are not clean, CAREFULLY wash and dry them before disinfection.
  • Clean the end of the teat to remove any contaminated skin, dirt or manure.
  • Disinfect the far teats before the near teats to avoid accidental contamination of previously disinfected teats.
  • Insert the syringe nozzle of Teatseal into the teat canal, grasp the base of the teat near the udder attachment with two fingers, press firmly together and slowly inject all contents. Use one complete syringe per quarter. Do not massage. Teatseal must remain in the teat to be effective.


  • To effectively strip Teatseal, be sure to grab the top of the teat ― where it meets the udder ― and work all the way down. Don’t grab the middle of the teat; squeeze and work down. This will only clear the bottom half of the teat. Strip the entire quarter by starting at the top and working all the way down.
  • Strip aggressively ― 10 to 12 times per quarter ― for the first four days post-freshening. This helps to ensure that you're removing the plug and all particles of Teatseal. Do not remove Teatseal by action of the milking machine.
  • Milk into a bucket for the first three to four days post-freshening. This will help to remove any remaining particles of Teatseal.


Store below 30°C (room temperature).

Additional Information 

Withholding period
Milk: Do not use within 4 days of calving where milk or
milk products may be used for human consumption.
Meat: Nil.
  • Immediately after the last milking at drying off, prior to treatment with dry cow antibiotic
  • and/or Teatseal, the udder should be stripped.
  • During the administration of the product it is important to ensure that infection is not introduced.
  • Thoroughly clean hands prior to administration and put on gloves. Completely disinfect teat ends – a critical step. Start with the teats furthest away. Use surgical spirit or alcohol teat wipes (one per teat) and leave to air dry.
  • Treat all quarters. Treat the teats nearest you first. Gently squeeze the top of teats when inserting product to encourage syringe contents to stay within the teat. Be careful not to contaminate syringe nozzle. Do not insert the full depth of syringe nozzle into the teat – just the tip – otherwise damage may occur.
  • After infusion do not massage or squeeze the teat. Do not massage the teat or udder. Teatseal must remain in the lower part of the teat. Disinfect with a teat dip or spray.
  • Do not allow treated animals to lie down on bare ground or in soiled areas for 2 hours after treatment. Once the group has been treated, walk directly to a clean pasture.
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