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View Poll Results: Sunbrella or Seamark
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Sunbrella vs Seamark

Old 04-05-2021, 07:27 PM
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Default Sunbrella vs Seamark

Iím ready to have our canvas enclosure replaced. Not sure if itís current age, but it doesnít quite fit right anymore, some seams are splitting, and the eisenglass is yellowing and cracked in a spot or two.

The current bimini and camper top are Seamark and the side curtains are standard Sunbrella. We do occasionally have a couple mildew spots on the vinyl interior of the Seamark.

Should we go with Seamark again or should we use standard Sunbrella? Both canvas shops we are looking at suggest standard Sunbrella over Seamark. They say Seamark has a tendency to have cracks in the vinyl and even can delaminate. However, our existing Seamark has held up great.
Old 04-05-2021, 07:30 PM
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I like sunbrella
Old 04-05-2021, 07:30 PM
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Never worked with the Seamark, but the Sunbrella is pretty impressive stuff. I've had some over 10 years and some almost 20 and they still look great.
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Old 04-05-2021, 07:43 PM
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Originally Posted by Djosephm View Post
I like sunbrella
Seamark is Sunbrella.

Seamark is standard Sunbrella with a vinyl coating on one side to make it 100% waterproof vs water resistant like standard Sunbrella. Because itís vinyl-coated Sunbrella, it has the same colors, and same properties as the Sunbrella we all know and love. Itís just waterproofed with vinyl.

One downside to Seamark is it is no longer breathable because of the vinyl coating and they recommend only doing your canvas tops with it. The other downside that Iíve heard of, but we have not experienced it with ours, is that the vinyl can crack over time and look unsightly being the interior of your canvas.
Old 04-05-2021, 07:46 PM
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Originally Posted by km1125 View Post
Never worked with the Seamark, but the Sunbrella is pretty impressive stuff. I've had some over 10 years and some almost 20 and they still look great.
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Yes, no doubt. Our current enclosure is 15 year old Sunbrella with the Sunbrella Seamark for the bimini and camper tops.

Definitely using Sunbrella again, but debating on plain Sunbrella tops or the vinyl-coated Sunbrella Seamark.

I really like how not even a drop of water comes through our 15 year old Sunbrella Seamark top.
Old 04-05-2021, 08:12 PM
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I just did my T-top in Weblon regatta and I am working on the enclosure. Itís a vinyl coated on both sides, looks really nice and has a decent feel. Plus you can get it in white on one side and colors on the other. Itís supposed to be easy to clean since it is fully waterproof
Old 04-06-2021, 12:54 AM
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Originally Posted by rjbergen View Post
Seamark is Sunbrella.

Seamark is standard Sunbrella with a vinyl coating on one side to make it 100% waterproof vs water resistant like standard Sunbrella. ...
Well then, I guess I did have some experience with Seamark. My bridge cover was made with it. It is heavier too and doesn't fold up as compact as regular Sunbrella. It also doesn't stretch as much, which does make it harder to put on after it shrinks just a bit after many years.
Old 04-06-2021, 04:22 AM
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Originally Posted by tommyjones View Post
I just did my T-top in Weblon regatta and I am working on the enclosure. Itís a vinyl coated on both sides, looks really nice and has a decent feel. Plus you can get it in white on one side and colors on the other. Itís supposed to be easy to clean since it is fully waterproof
I'd be concerned about breathability with a full vinyl enclosure. I feel like that would lead to mildew problems.
Old 04-06-2021, 04:45 AM
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Originally Posted by km1125 View Post
Well then, I guess I did have some experience with Seamark. My bridge cover was made with it. It is heavier too and doesn't fold up as compact as regular Sunbrella. It also doesn't stretch as much, which does make it harder to put on after it shrinks just a bit after many years.
That is our experience as well. It was only used for the bimini and camper tops. The side curtains are standard Sunbrella. The Seamark worked well keeping the boat dry. I guess I'm a little nervous about using it now that 2 canvas shops say they recommend not using it due to issues, but will use whatever I spec. Both shops prefer standard Sunbrella and believe it's water repellency is plenty for bimini and camper tops. Their gripe with Seamark is the PVC backing cracking over time. It doesn't destroy the fabric or leak as the outer layer of Sunbrella holds it all together, but the cracks look unsightly and they are on the inside of the cockpit.

Another concern is that the standard Sunbrella has a 10 year warranty, but the Seamark only has a 5 year warranty. They're the same warranty against "loss of color and loss of strength" (however they define "strength"), so the Seamark having a shorter warranty would imply known issues with the PVC backing that they don't want to warranty.

Then again, I'm pretty sure our enclosure is OEM. We have a 2006 Chaparral and the enclosure has Ameritex tags and as far as I know, Ameritex only makes OEM canvas for Chaparral.
Old 04-06-2021, 06:30 AM
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Originally Posted by rjbergen View Post
I'd be concerned about breathability with a full vinyl enclosure. I feel like that would lead to mildew problems.
on my T-top itís not an issue as the enclosure is only 3 sided, but I see your concern. However, I havenít seen an airtight enclosure so I would bet the sun would dry it through convection if any moisture got in. I also saw the difference in warranty. While that was a bit of a concern I do my own work and I figured Iíll get 7-8 years Minimum out of the vinyl coated stuff. Since the product I used was half the cost of sunbrella I can afford to redo it.
I can say this, Iíve worked with both types and itís really a personal preference. The vinyl stuff literally looks slick while sunbrella has that sunbrella fabric feel.
Old 04-06-2021, 06:34 AM
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I had Seamark on the top structure on my express, with Sunbrella and Isinglass on the front, back and sides. I loved the waterproof characteristics of the Seamark, and it lasted a long, long time, but I did have mold issues in the Florida summer.
Old 04-06-2021, 07:21 AM
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Originally Posted by Commocean View Post
I had Seamark on the top structure on my express, with Sunbrella and Isinglass on the front, back and sides. I loved the waterproof characteristics of the Seamark, and it lasted a long, long time, but I did have mold issues in the Florida summer.
We have some mildew spots and we're only in Michigan. I can only imagine the extra humidity in Florida didn't help.
Old 04-06-2021, 08:23 AM
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I think cracking may be less of an issue on a top that stays up, and stretched flat, as opposed to one that is repeatedly folded, or stays folded for long periods. My biminis were always up, and now I have a hard top.

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