Lexan/polycarbonate vs acrylic - Page 3 - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 


Like Tree2Likes
Reply
 
LinkBack Thread Tools
  #21  
Old 03-31-2014
BoatyardBoy's Avatar
Senior Member
 
Join Date: Jun 2013
Location: NOLA
Posts: 233
Thanks: 88
Thanked 11 Times in 11 Posts
Rep Power: 2
BoatyardBoy is on a distinguished road
Re: Lexan/polycarbonate vs acrylic

Now, is there a special acrylic sheet that is best for marine use or is Plexiglas brand fine?

Sent from my HTC6500LVW using Tapatalk
Reply With Quote Share with Facebook
  #22  
Old 03-31-2014
hellosailor's Avatar
Plausible Deniability
 
Join Date: Apr 2006
Posts: 10,616
Thanks: 2
Thanked 88 Times in 86 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Re: Lexan/polycarbonate vs acrylic

Plexiglass (R) brand of acrylic glazing is just one brand. There are probably 20 or 30 different grades of clear Plexiglass alone, and most of the other brands will also have at least two dozen different grades of clear acrylics. Less variety in the tinted colors.

So you need to decide, local or mail order. Then find out which brand they carry, most shops only carry one or two lines.

Then you figure out which grade of the product you want, from what they have available.

In a choice of cast or extruded, some will say you only want extruded but that's going to limit your selection again.
Reply With Quote Share with Facebook
  #23  
Old 03-31-2014
Member
 
Join Date: Apr 2010
Location: Antelope, CA, USA
Posts: 62
Thanks: 11
Thanked 3 Times in 3 Posts
Rep Power: 5
ravinracin is on a distinguished road
Re: Lexan/polycarbonate vs acrylic

I can't say what impact issues you could have on your ports but in the NASCAR division I raced in untill recently, we were required to use only LEXAN for our windshields. It scratches easily and only mild soap and water should clean it, but I had Lexan on one car for 4 years and it was perfectly clean, clear and safe.
Reply With Quote Share with Facebook
  #24  
Old 03-31-2014
Maine Sail's Avatar
Senior Member
 
Join Date: Jan 2003
Location: Maine Coast
Posts: 5,348
Thanks: 11
Thanked 121 Times in 89 Posts
Rep Power: 15
Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice
Re: Lexan/polycarbonate vs acrylic

Quote:
Originally Posted by BoatyardBoy View Post
Now, is there a special acrylic sheet that is best for marine use or is Plexiglas brand fine?

Sent from my HTC6500LVW using Tapatalk
Cast acrylic is what is used. The most widely used product in marine applications is Evonik/Cyro Acrylite
__________________
______
-Maine Sail / CS-36T


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.




© Images In Posts Property of Compass Marine Inc.


Reply With Quote Share with Facebook
  #25  
Old 03-31-2014
BoatyardBoy's Avatar
Senior Member
 
Join Date: Jun 2013
Location: NOLA
Posts: 233
Thanks: 88
Thanked 11 Times in 11 Posts
Rep Power: 2
BoatyardBoy is on a distinguished road
Re: Lexan/polycarbonate vs acrylic

Quote:
Originally Posted by Maine Sail View Post
Cast acrylic is what is used. The most widely used product in marine applications is Evonik/Cyro Acrylite
Thanks, Yea I read cast is better. Thanks for the names too. Appreciate it

Sent from my HTC6500LVW using Tapatalk
Reply With Quote Share with Facebook
  #26  
Old 4 Weeks Ago
Senior Member
 
Join Date: Oct 2008
Location: Ottawa Canada
Posts: 202
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 6
weephee is on a distinguished road
Re: Lexan/polycarbonate vs acrylic

Great thread as it applies to what I'm doing. One question though. My boat has the portlights surface mounted on the inside and screwed into the fiberglass every 3 inches. I need to replace them and would like to go with tinted acrylic. If I use the dow 795 and the 3M VHB tape will it be strong enough without using fasteners. There is some curve but not a lot to fiberglass but again from the inside.
Reply With Quote Share with Facebook
  #27  
Old 4 Weeks Ago
hellosailor's Avatar
Plausible Deniability
 
Join Date: Apr 2006
Posts: 10,616
Thanks: 2
Thanked 88 Times in 86 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Re: Lexan/polycarbonate vs acrylic

The thing about VHB tape is that it wants to see perfectly matching contours. Flat on flat or curved to curve, they should mate flush if you want the VHB to bond them. If you can grind or fill to make that happen, call 3M's toll-free number and someone will be able to tell you the exact strength that tape can provide, probably "xx pounds per square inch".
Reply With Quote Share with Facebook
  #28  
Old 4 Weeks Ago
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,110
Thanks: 0
Thanked 71 Times in 62 Posts
Rep Power: 8
mitiempo will become famous soon enough mitiempo will become famous soon enough
Re: Lexan/polycarbonate vs acrylic

Quote:
Originally Posted by weephee View Post
Great thread as it applies to what I'm doing. One question though. My boat has the portlights surface mounted on the inside and screwed into the fiberglass every 3 inches. I need to replace them and would like to go with tinted acrylic. If I use the dow 795 and the 3M VHB tape will it be strong enough without using fasteners. There is some curve but not a lot to fiberglass but again from the inside.
What kind of boat do you have? I have never seen ports installed that way.
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Share with Facebook
  #29  
Old 4 Weeks Ago
Irunbird's Avatar
Senior Member
 
Join Date: Aug 2008
Location: Charleston, SC
Posts: 290
Thanks: 6
Thanked 3 Times in 2 Posts
Rep Power: 7
Irunbird is on a distinguished road
Re: Lexan/polycarbonate vs acrylic

I agree- great questions.. (and timely)- I'm going to replace my windows with acrylic and bought both VHB tape and may also use Dow 795 (also happen to have a tube of that), but I'm hesitant to not reinstall with nuts and bolts. I know of another Olson 30 that used just the Dow 795, but for some reason that seems risky. I know I have a long way to go learning about singlehanding, and I just did a 120 nm round trip (and could NOT sleep) but is that stuff so good that nuts/bolts are no longer needed?
Reply With Quote Share with Facebook
  #30  
Old 4 Weeks Ago
hellosailor's Avatar
Plausible Deniability
 
Join Date: Apr 2006
Posts: 10,616
Thanks: 2
Thanked 88 Times in 86 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Re: Lexan/polycarbonate vs acrylic

Guys, Dow's data sheets say that 795 is suitable for use on GLASS and aluminum. It is not stated anywhere on their data sheet that it can or should be used on acrylic or fiberglass. It is a silicone rubber sealant, and traditionally those ALWAYS peel off acrylic and release after they've worked for a while.

So...Try 3M's 4000 adhesive, which is designed for polycarbonate and acrylics. Or something else. If the data sheet does not expressly say you can use it with acrylic--it will fail.

VHB tape was just on the history channel, as "one of the world's ten strongest products". But again, that's subject to following the directions.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Bonding aluminum to polycarbonate: primer? cghubbell Gear & Maintenance 16 07-27-2010 05:33 PM
Gluing/Welding Cracked Lexan/Acrylic Hatch? FishFinder Gear & Maintenance 2 05-31-2010 07:53 PM
Lexan VS Acrylic weephee General Discussion (sailing related) 18 04-12-2010 10:11 PM
Acrylic or Polycarbonate for windows jephotog Gear & Maintenance 23 12-06-2009 11:59 PM
Source for Polycarbonate jerryr Gear & Maintenance 3 08-25-2001 02:47 PM


All times are GMT -4. The time now is 03:20 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.