Just to follow up on this for future reference, it turned out the hatch foam I got from McMaster Carr (#6322K13) was in fact correct (or at least close enough and seems to be working well).
Since I thought it was too squishy I ended up doing a second order and getting EPDM o-ring cord stock (#9616K17), at the recommendation of a McMaster Carr customer support person. Installed that and found out it was way too firm - the hatch wouldn't close because the metal edges actually need to insert into the foam-filled track. Doh! Had to rip that out and clean out the glue, then installed the original santoprene foam order. Seems to be working well. In this process I also discovered one hatch latch is broken - 316 SS bolt completely corroded away / disintegrated. So added a project to the list in the process of fixing one - that seems to be a way of life with boats. : ) On Wed, Apr 8, 2015 at 8:07 PM, Patrick Davin <jda...@gmail.com> wrote: > Oops, I think I messed things up already. > My McMaster Carr foam cord arrived this week and it's much more squishy > and soft than I expected. I got the "weather-resistant high-temperature > santoprene foam" (part #6322K13) because they sell it in 10' lengths > ($7.70) and it sounded similar to the other foam on that page (which is > only sold in 100' lengths for $33). > > The foam compresses under my finger down to the height of the hatch groove > (flush with the surface) which doesn't seem like it will make a seal. > http://svviolethour.com/?attachment_id=183 > http://svviolethour.com/?attachment_id=184 > > I guess I should've gotten the "weather resistant EPDM foam" (part > #8605K43). Now I'll have 100' when I only need 6'. So if anyone near > Seattle needs some foam cord, just let me know! > > -Patrick > 1984 LF38 S/V Violet Hour > Seattle, WA > > On Wed, Mar 25, 2015 at 9:11 PM, Patrick Davin <jda...@gmail.com> wrote: > >> Thanks for the quick replies! It sounds like McMaster is the easiest way >> to go. >> Hammerhead also has the solid round neoprene gasket but don't have online >> ordering. Good to have as an option too though. >> >> I think the side hatches are probably 3/8". 1/2" sounds like it'd only be >> the large hatches. I'll measure before ordering. >> >> Bob, I did read your hatch post a few weeks ago actually - I'll use that >> to guide the cleaning + sealing. However you did the large hatches (fore >> and cabin) and I don't think I have those same hatches. The side hatches I >> sent pics of are definitely original, but the large hatches look like >> Lewmar. They don't have any leak issues so far that I can tell. >> >> >> On Wed, Mar 25, 2015 at 7:07 PM, Robert Boyer <dainyr...@icloud.com> >> wrote: >> >>> I replaced my hatch gaskets with 5/8-inch round gasket material and it >>> wouldn't fit properly in the grooves in the hatch frame and I couldn't >>> close the hatches without breaking something--so, I went back to 1/2-inch >>> as it was originally designed. (I've described this on one of my >>> blogposts.) >>> >>> When the hatch seals age, the rubber gets hard and brittle and no longer >>> is elastic enough to make the seal--its not a bad design. Mine were 30+ >>> years old when I replaced them. >>> >>> Bob Boyer >>> S/V Rainy Days / Annapolis MD >>> 1983 C&C Landfall 38 - Hull #230 >>> email: dainyr...@icloud.com >>> blog: dainyrays.blogspot.com >>> >>> "There is nothing--absolutely nothing--half so much worth doing as >>> simply messing about in boats." --Kenneth Grahame >>> >>> On Mar 25, 2015, at 9:50 PM, Patrick Davin via CnC-List < >>> cnc-list@cnc-list.com> wrote: >>> >>> I know this question came up in 2006 ( >>> http://cnc-list.com/pipermail/cnc-list_cnc-list.com/2006-May/002846.html >>> ), but that's 9 years ago and the story may have changed since then. >>> >>> I'm getting to work on a few leaks in our boat, and the galley + head >>> hatches (LF38) come first. >>> >>> The previous thread recommended Clean Seal, or direct from Atkins & >>> Hoyle (for the more expensive option). I had trouble finding the part # on >>> Clean Seal though. Are those two still the best options? >>> >>> Here's are some pics of the galley hatch: >>> http://svviolethour.com/?attachment_id=181 >>> http://svviolethour.com/?attachment_id=179 >>> http://svviolethour.com/?attachment_id=180 >>> >>> The current gasket material actually doesn't look that bad, it just >>> doesn't seat well - so unless I'm very careful to cram it in the right >>> spots we get leaks. I almost wonder whether it's just the wrong size/shape >>> for the hatch? >>> >>> Would something like the Bomar Hatch gasket material (5/8" in an >>> extruded format or 9/16" in round) on Defender possibly work? >>> >>> http://www.defender.com/product3.jsp?path=-1|6880|2290165&id=1230878 >>> >>> -Patrick >>> 1984 LF38 S/V Violet Hour >>> Seattle, WA >>> >>> _______________________________________________ >>> >>> Email address: >>> CnC-List@cnc-list.com >>> To change your list preferences, including unsubscribing -- go to the >>> bottom of page at: >>> http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >>> >>> >> >
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