# Loctite Marine - batch issues

**URL:** <https://discuss.bluerobotics.com/t/loctite-marine-batch-issues/21509>\
**Category:** Build/Make\
**Created:** [September 2, 2025, 8:34pm UTC](https://discuss.bluerobotics.com/t/loctite-marine-batch-issues/21509 "2025-09-02T20:34:09Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![olitills](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/olitills/32/9387_2.png) [@olitills](https://discuss.bluerobotics.com/u/olitills)\
**Post date:** [September 2, 2025, 8:34pm UTC](https://discuss.bluerobotics.com/t/loctite-marine-batch-issues/21509/1 "2025-09-02T20:34:09Z")

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Hi - has anybody else encountered issues with some Loctite Marine Epoxy batches? We are in the UK so buy from JB-Tools in US, and in our most recent order have found 50 % of 30 syringes have lumpy hardener, which is difficult to remove and almost appears like it has seperated. What’s more - once cured it is tacky. Please find two videos here - OK, and DODGY showing the difference between the two.

Are we alone in encountering this issue? I cannot see a use by date on either the syringe or outer packaging.

> **[Dropbox](https://www.dropbox.com/scl/fo/tbw16o0n8uxiwmve64i0c/ALSorljKQ2FAQxkJyVN8sjs?rlkey=jm52c1t3mm9m5n6ltz161o2wv&st=sk0zsr7s&dl=0)**

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**Author:** ![tony-white](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/tony-white/32/18385_2.png) [@tony-white](https://discuss.bluerobotics.com/u/tony-white)\
**Post date:** [September 2, 2025, 8:56pm UTC](https://discuss.bluerobotics.com/t/loctite-marine-batch-issues/21509/2 "2025-09-02T20:56:47Z")

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Hi @olitills -

That definitely looks like a bad batch! Blue Robotics has moved away from epoxy in every way it can, and does not use that Loctite Marine Epoxy any longer, for anything! I hope you’re able to follow up with your supplier and resolve the issue…. best of luck!

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**Author:** ![olitills](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/olitills/32/9387_2.png) [@olitills](https://discuss.bluerobotics.com/u/olitills)\
**Post date:** [September 2, 2025, 9:07pm UTC](https://discuss.bluerobotics.com/t/loctite-marine-batch-issues/21509/3 "2025-09-02T21:07:40Z")

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Thanks @tony-white - this is good to know.

What epoxy do BR now use?

Unfortunately we are limited on this component to needing an epoxy solution.

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**Author:** ![tony-white](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/tony-white/32/18385_2.png) [@tony-white](https://discuss.bluerobotics.com/u/tony-white)\
**Post date:** [September 2, 2025, 9:35pm UTC](https://discuss.bluerobotics.com/t/loctite-marine-batch-issues/21509/4 "2025-09-02T21:35:43Z")

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Hi @olitills -

I believe [B45-TH](https://www.reltekllc.com/Portals/0/PDF%27s/Datasheets/4x-Datasheet_BONDiT_B-45TH.pdf) is what is used currently, but only for thruster/motor sealing of the junction between cable and stator wires.

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**Author:** ![psupine](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/psupine/32/16137_2.png) [@psupine](https://discuss.bluerobotics.com/u/psupine)\
**Post date:** [September 3, 2025, 10:25pm UTC](https://discuss.bluerobotics.com/t/loctite-marine-batch-issues/21509/5 "2025-09-03T22:25:54Z")

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> [@tony-white](#):
>
> [B45-TH](https://www.reltekllc.com/Portals/0/PDF%27s/Datasheets/4x-Datasheet_BONDiT_B-45TH.pdf)

This looks like impressive stuff. Reltek use this in their PTFE bonding kit too