Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-12-2018, 09:56 PM   #1
Guru
 
Codger2's Avatar
 
City: San Diego
Country: US
Vessel Name: "Sandpiper"
Vessel Model: 2006 42' Ocean Alexander Sedan
Join Date: Oct 2007
Posts: 5,518
Makralon vs. Lexan

I'm having a new flybridge surround (4 sides) installed next month and I'm wondering what the membership thinks is the best polycarbonate.

.040 Makralon or .060 lexan?
Attached Thumbnails
Click image for larger version

Name:	IMG_0663.jpg
Views:	75
Size:	103.4 KB
ID:	81833  
__________________
Advertisement

__________________
Codger2

My passion for improving my boat(s) exceeds my desire to constantly cruise them.
Codger2 is offline   Reply With Quote
Old 10-12-2018, 10:08 PM   #2
Guru
 
Lou_tribal's Avatar
 
City: Quebec
Country: Canada
Vessel Name: Bleuvet
Vessel Model: Custom Built
Join Date: Jan 2016
Posts: 2,977
These two are basically polycarbonate sheets from different manufacturer so similar. They are available in different grades.
Find below a link to comparison chart between makrolon grades and lexan grades

http://www.acplasticsinc.com/techShe...Comparison.pdf

L
__________________

Lou_tribal is online now   Reply With Quote
Old 10-12-2018, 10:17 PM   #3
CMS
Senior Member


 
City: Casco Bay
Country: USA
Join Date: Feb 2016
Posts: 177
Quote:
Originally Posted by Codger2 View Post
I'm having a new flybridge surround (4 sides) installed next month and I'm wondering what the membership thinks is the best polycarbonate.

.040 Makralon or .060 lexan?

You'll want Makrolon AR2 (Abrasion resistant both sides).





This was at 8 years old in 2016. Still looks this good today. The only things that have ever touched it are IMAR and a fresh brand new microfiber rag each treatment...

__________________
-CMS

MarineHowTo.com
CMS is offline   Reply With Quote
Old 10-13-2018, 08:20 AM   #4
Guru
 
ranger42c's Avatar
 
City: Maryland
Country: USA
Vessel Model: 42' Sportfish
Join Date: Aug 2013
Posts: 3,837
Quote:
Originally Posted by CMS View Post
You'll want Makrolon AR2 (Abrasion resistant both sides).

This was at 8 years old in 2016. Still looks this good today. The only things that have ever touched it are IMAR and a fresh brand new microfiber rag each treatment...
Nice! No sign of clouding or yellowing?

Our front panels are Makrolon, installed in 2009 and up 24/7/365, and two of the panels have started to cloud over this last year or so. Don't know what grade Makrolon it is, though; didn't at the time know enough about it to realize there are (were) various grades...

-Chris
__________________
South River, Chesapeake Bay
ranger42c is offline   Reply With Quote
Old 10-13-2018, 09:52 AM   #5
Guru
 
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 7,157
Walt
Eighteen months ago we went with Margard (GE Lexan) coated on both sides. Stamoid fabric. So far so good. Yes the product is important, but the experience and skill of the installer trumps all.

I'd guess the less than perfect SoCal air, age and improper cleaning could lead to Lexan cloudiness after 9 years as you've experienced. We're on the boat, I'm sending you pictures today.
sunchaser is offline   Reply With Quote
Old 10-13-2018, 12:48 PM   #6
Senior Member
 
City: Great Lakes
Country: USA
Vessel Model: OA 440
Join Date: Aug 2017
Posts: 179
Quote:
Originally Posted by ranger42c View Post
Nice! No sign of clouding or yellowing?

Our front panels are Makrolon, installed in 2009 and up 24/7/365, and two of the panels have started to cloud over this last year or so. Don't know what grade Makrolon it is, though; didn't at the time know enough about it to realize there are (were) various grades...

-Chris
I used their basic offering to make hail shields for the large, flat sky lights on the house in Texas. It turned to a cloudy yellow at about the ten year mark. I changed to the AR product last year, which addresses abrasion but it's not clear if it enhances UV resistance.
Rufus is offline   Reply With Quote
Old 10-15-2018, 11:46 AM   #7
Guru
 
Codger2's Avatar
 
City: San Diego
Country: US
Vessel Name: "Sandpiper"
Vessel Model: 2006 42' Ocean Alexander Sedan
Join Date: Oct 2007
Posts: 5,518
Quote:
Originally Posted by Codger2 View Post
.040 Makralon or .060 lexan?
Thanks for all the info but I'm going to follow the suggestions from the guy who's making the enclosure. He recommends .060 Lexan Margard. He has used a lot of Makrolon in the past but had trouble with "yellowing" after 3 years. So, it's a coin toss! P.S. He's also the oldest canvas shop in my city!
__________________
Codger2

My passion for improving my boat(s) exceeds my desire to constantly cruise them.
Codger2 is offline   Reply With Quote
Old 10-15-2018, 12:52 PM   #8
Guru
 
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 7,157
Quote:
Originally Posted by Codger2 View Post
Thanks for all the info but I'm going to follow the suggestions from the guy who's making the enclosure. He recommends .060 Lexan Margard. He has used a lot of Makrolon in the past but had trouble with "yellowing" after 3 years. So, it's a coin toss! P.S. He's also the oldest canvas shop in my city!
Walt
Your guy sounds smart. Another TF member had trouble with Makrolon, to the point replacement was required after a year. But, each install and material selection is different. We chose two side coating Margard after looking at about 4 similar very nice Margard installs in our Marina done by the same guy.

Did you show my pictures to your guy showing the seams, zippers and fabric to Lexan joining?
sunchaser is offline   Reply With Quote
Old 10-15-2018, 01:35 PM   #9
Guru
 
ranger42c's Avatar
 
City: Maryland
Country: USA
Vessel Model: 42' Sportfish
Join Date: Aug 2013
Posts: 3,837
Quote:
Originally Posted by Rufus View Post
I changed to the AR product last year, which addresses abrasion but it's not clear if it enhances UV resistance.
The chart Lou posted in #2 suggests AR is also UV resistant. I can't tell if that means MORE resistant than the ones listed above it on the chart or not...

-Chris
__________________
South River, Chesapeake Bay
ranger42c is offline   Reply With Quote
Old 10-15-2018, 01:42 PM   #10
Guru
 
twistedtree's Avatar
 
City: Gloucester, MA
Country: USA
Join Date: Jan 2013
Posts: 3,975
I expect UV resistance would be very important. Also, I don't know if the materials are similar and whether this would even apply, but you commonly see yellowed/fogged headlight covers on cars. That's a result of using ammonia-based cleaners. Most people assume it's UV related, but it's 100% owner/user induced. It makes me wonder if yellowing of the lexan etc panels is similar....
__________________
www.MVTanglewood.com
twistedtree is offline   Reply With Quote
Old 10-16-2018, 08:54 AM   #11
Guru
 
ranger42c's Avatar
 
City: Maryland
Country: USA
Vessel Model: 42' Sportfish
Join Date: Aug 2013
Posts: 3,837
Quote:
Originally Posted by twistedtree View Post
I expect UV resistance would be very important. Also, I don't know if the materials are similar and whether this would even apply, but you commonly see yellowed/fogged headlight covers on cars. That's a result of using ammonia-based cleaners. Most people assume it's UV related, but it's 100% owner/user induced. It makes me wonder if yellowing of the lexan etc panels is similar....

In our case, I think it's just age... especially since our clouding is starting near the bottom edges of the two panels that see the most consistent sunlight, and gradually working it's way north.

If it were from cleaning, I'd think it would be throughout each panel. And then I do (most of) the cleaning myself with water, Imar #301 and #302, microfiber cloths, etc.

I don't know what "grade" our Makrolon is...

-Chris
__________________
South River, Chesapeake Bay
ranger42c is offline   Reply With Quote
Old 10-24-2018, 03:45 PM   #12
Guru
 
ranger42c's Avatar
 
City: Maryland
Country: USA
Vessel Model: 42' Sportfish
Join Date: Aug 2013
Posts: 3,837
Just to add a bit more info... I talked with our fabricator this morning, to get in his queue for some repair work sometime over the coming winter... and while we were at it, he mentioned another grade of Makrolon. He didn't have the name off-hand, so I rummaged around on the Covestro site, discovered there are about a bazillion different grades, but eventually found this:

https://www.sheets.covestro.com/~/me...046_Marine.pdf

I suspect he was thinking or Makrolon Marine 5, which apparently comes in two gauges, .060" and .080".

-Chris
__________________
South River, Chesapeake Bay
ranger42c is offline   Reply With Quote
Old 10-28-2018, 11:45 PM   #13
Guru
 
refugio's Avatar
 
City: Meydenbauer Bay Yacht Club
Country: USA
Vessel Name: Lulu (Refugio sold)
Join Date: Mar 2012
Posts: 1,181
I think my fabricator will be using this - and he can sew the .060 but has to bond the .080 which is damned expensive.
__________________
Keith
refugio is online now   Reply With Quote
Old 10-29-2018, 09:17 AM   #14
Guru
 
City: gulf coast
Country: pinellas
Join Date: Jun 2014
Posts: 2,511
I had coated lexan for ten years and still clear. IIRC it was 50 ga except for 30 ga at curved areas that eliminated frames .
bayview is offline   Reply With Quote
Old 10-29-2018, 10:03 AM   #15
Guru
 
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 7,157
Quote:
Originally Posted by bayview View Post
I had coated lexan for ten years and still clear. IIRC it was 50 ga except for 30 ga at curved areas that eliminated frames .
By using laminating vs stitching, thicker Lexan can be pulled into pretty tight radius curves and minimize the cracking/crazing potential as thread ages. That is what our installer says anyway, and in our case he is so far correct.

Refugio, why would bending be expensive? It goes really fast if in the hands of a pro. I've watched it being done and no problem with time or materials.

For anyone with any interest, PM me your email and I'll send some close ups.
sunchaser is offline   Reply With Quote
Old 10-29-2018, 06:47 PM   #16
Guru
 
refugio's Avatar
 
City: Meydenbauer Bay Yacht Club
Country: USA
Vessel Name: Lulu (Refugio sold)
Join Date: Mar 2012
Posts: 1,181
@sunchaser It’s bonding that’s expensive - not bending. In the PNW that’s a Barrett patent and they charge for rectangular sheets with no allowance to use leftover. For me, with triangular windows, it was an extra $2k over .060.
__________________
Keith
refugio is online now   Reply With Quote
Old 10-29-2018, 07:56 PM   #17
Member
 
City: Port Ludlow, WA
Country: USA
Vessel Name: Red Knot
Vessel Model: Mainship 34T
Join Date: Aug 2015
Posts: 7
Makrolon Marine 5 is the new product that is able to be bent more but is also more expensive. I am having my flybridge enclosure redone and will be using both the Marine 5 and less expensive AR. My installer with twenty years of experience says he has had good results with Markolon in general and no issues with early yellowing.
__________________

Harlen is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 10:30 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012