Deck hatch gasket source

[mkgsail]

We have several lazarettes on our 2005 Voyage 440. The original gaskets are no longer maintaining water tight seals. They were dimensionally and visually similar to the Trimlok 2828 D-profile EPDM foam rubber seal so I carefully installed that on a forward deck hatch. I followed their recommended compression height and slowly increased the compression but they never sealed out water completely. I believe they were too soft. Getting their application help for a small quantity purchase was unsuccessful.
Sources like West Marine and Defender have very limited offerings.
I have searched had little luck finding a good source for replacing these critical gaskets. Any advice would be appreciated.
See pictures of the Trimlok I tried and the original gasket mounted on the deck hatch.



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[GeoBay]

Atkins & Hoyle located in Ontario Canada sell replacement gasket tubing. It comes in a few different diameters and is the neoprene type really good quality but I found them expensive. I've tried to source from other vendors but couldn't find any. Hope this helps.

[Chardonnay]

McMaster Carr has a large selection of gasket materials. Their selection tables are pretty good also.

[psk125]

These guys would be good for you to talk with: https://hatchmasters.com

Not cheap, but they know what they're doing.

[stainless guy]

These guys should have what you need and ship globally
I deal with them fairly regularly as they are local to me
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