Delivery to UK Mainland from £2.50
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14 Day Refunds & Return Policy

Bio Neck Seal


The Bio Neck Seal is a revolutionary new concept in assisting a diver or drysuit user to achieve a continual leak free and comfortable neck seal, whilst in water or underwater. A standard Latex or Neoprene drysuit neck seal can develop a problem with minor leaks, due to natural imperfections, around the area where a divers neck meets the dry suit neck seal. This can become uncomfortable, especially after extended periods in or under water, both during a dive and on the surface, in between mult...

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  • Medium – 11”-14”
  • Large – 15”+
  • Helps to Achieve a Continual Leak Free Neck Seal
  • Reduces Natural Imperfections in Drysuit Neck Seals
  • Greatly Reduces Neck Seal Leakage
  • Vastly Increases Overall Neck Seal Comfort
  • Useful for Diving, Surfing and Many Other Water Sports

Delivery, Returns & Instore Collection

When will I receive my order?

International Delivery Times

Monday – Friday 3 – 5 Working Days

UK Mainland Delivery Times

Monday – Friday before 2pm Next Working Day
Monday – Friday after 2pm 2 Working Days
Saturday & Sunday 2 Working Days

UK Extended Areas Delivery Times

Monday – Sunday 3 – 5 Working Days

Please note delivery times may be extended during busy periods.

EU Areas

Please note that due to changes by HMRC, orders being shipped to EU countries will not be shipped on the same day as they are invoiced. EU Orders will now be shipped on the next working day. This only applies to E.U. orders. Domestic and Worldwide shipments remain the same.

Collect In Store?

When you go to the online checkout, you can opt to collect your items in store. We'll let you know when your order is ready for you to collect. Your order will normally be ready to collect the next working day.

Returns, refunds or exchanges?

You can return any item within 28 days of receipt for a refund, provided the item is unused, in its original packaging and in 'as new' condition.

Items will be refunded in full (less postage) if received within 28 days from the date of despatch.


We aim to deal with all returns and exchanges on the day they arrive, however please allow longer during peak periods.

You can return the item(s) by dropping them off in store or by returning the item(s) by post. We do not insist on a specific courier service for the return, so please use the most economical or appropriate method for returning the item(s).

Northern Diver (Int) Ltd
Appley Lane North
Appley Bridge

If an item becomes faulty after a period of time then please contact customer services (01257 254 444 or prior to returning the item. We will either repair or replace the item at our discretion.

Tell Us What You Think

Customer Reviews

5 out of 5 Stars (3 reviews)

Write a Review

For Open Water Swimers

By Gozo Dave on 20 Sep. 2015

If you are an open water swimmer and suffer from neck burn, throw away your lotions and invest in this amazing Bio Neck Seal. You will never have neck burn again and it also stops water from going down at the neck... The stickiness wears in time and gets easier to put on so don't get too frustrated at first.

It works!

By Peter Messenger on 04 Sep. 2017

Needed a quick fix for a leaking neck seal on my old dry suit until I can sort out the problem permanently and this seems to have done the trick having used it just once so far. The bio-seal is a comfortable snug fit around my neck and the neoprene neck seal fits on to it well. It's easy to put in place and caused no problems over the 6 hours that I had it on.Just hoping it holds out for a weeks diving in the Scillies.

Update of last review

By Peter Messenger on 07 Oct. 2017

After a weeks diving in the Scillies I am very impressed. A week of no neck seal leaks and comfy dives - 8 in total over 4 days - 2 days lost due to weather. It was still as easy to fit and no problems with leaving it on between dives. No problems when putting hood on - I have a Waterproof H1 5mm hood. At the end of the day just wash in fresh water, leave to dry and then back in the container. Lot of interest from other divers. A good investment as a quick fix solution.


Non-Magnetic Item

Non-Magnetic Item

To use the non-magnetic symbol for our diving suits and equipment, we have our products individually tested at QinetiQ, Portland.

Trade Customers

Northern Diver offers trade accounts. Please click here to register your details and find out if you qualify. Once your trade account has been confirmed you can view all trade prices and shop easily online when logged into your account. Please note when you are not logged in to your trade account retail prices are shown. If you have any queries please do not hesitate to contact us. Tel: +44 (0) 1257 25 44 44.