Softening or removing silicon sealant - SailNet Community
Reply
 
LinkBack Thread Tools
post #1 of 12 Old 11-14-2006 Thread Starter
seeker
 
Join Date: Sep 2006
Location: western canada
Posts: 74
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Softening or removing silicon sealant

There are two decklights on a boat I recently bought set flush into the deck and held with sealant. The previous owner has attempted to seal them with what looks like an entire tube of silicon. The lights themselves appear to be of 3/8 to 1/2 inch plexiglass or lexan with about 1/8 inch of space around the perimeter for sealant and about a 1/2 inch lip under to support them. The question I have is this...How do I remove the silicon, and loosen the plexiglass so that I may re-seal properly, without destroying all and sunder?
Is there anything that will soften silicon? Could I use slow, increasing pressure from underneath till they pop? Heat?
Gratefull for any help.

Feetup
feetup is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 12 Old 11-14-2006
Senior Member
 
Join Date: Jun 2006
Posts: 2,394
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 12
     
razor blade & elbow grease.

We are not primarily on earth to see through one another, but to see one another through

Some people are like slinkies: not really good for anything... but you can't help laughing when you push them down the stairs
cardiacpaul is offline  
Quote Quick Reply Share with Facebook
post #3 of 12 Old 11-14-2006
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 14 Times in 12 Posts
Rep Power: 14
         
And lots of the latter..

BTW, using brute force is generally a really bad idea.

Sailingdog

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

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #4 of 12 Old 11-14-2006
Junior Member
 
Join Date: Nov 2006
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Hi,

You should try a product called Debond or 3M Silicone softener. Debond works the best.
niorn is offline  
Quote Quick Reply Share with Facebook
post #5 of 12 Old 11-15-2006 Thread Starter
seeker
 
Join Date: Sep 2006
Location: western canada
Posts: 74
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
To niorn

Thanks niorn
I suspected there would be a product to soften silicon, do you know if it is safe on fiberglass os lexan?
The reason I am looking for an alternative to a razor blade is that the interface between plexiglass and fiberglass forms a right angle that would be very difficult to cut into.

Feetup
feetup is offline  
Quote Quick Reply Share with Facebook
post #6 of 12 Old 11-15-2006
Member
 
Join Date: Jun 2005
Posts: 90
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
 
Hi!

Debond will attack lexan.
I don't have any experience with the silicon softener.
I would try and test it first.

Todd
redcorvette1995 is offline  
Quote Quick Reply Share with Facebook
post #7 of 12 Old 11-15-2006
Reward for lost Kraken!
 
hellosailor's Avatar
 
Join Date: Apr 2006
Posts: 11,445
Thanks: 5
Thanked 131 Times in 128 Posts
Rep Power: 11
   
Feetup, I would expect most of the solvents could hurt (eventual cracking and crazing) your deadlights, whether they are polycarbonate or (more likely) plain acrylic. If you can drill or pick or chew one small hole all the way past the edge, you can pass a piano wire or mono fishing line ("Spidersilk" or other aramid/kevlar material) through the hole, and working with two people, saw it back and forth around the deadlight to cut the sealant.

Depending on what it was bonded with and how well it was bonded, simply pulling or pressing just may not do anything. Using a heat gun and really heating it up as much as you dare, might help release it.

But you may just need to replace the deadlights, or find that's the easiest thign to do. If they are just 1/2" sheet plastic, any plastics shop should be able to made replacements for you at a reasonable cost.
hellosailor is offline  
Quote Quick Reply Share with Facebook
post #8 of 12 Old 11-15-2006
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 14 Times in 12 Posts
Rep Power: 14
         
The product manufacturer should be able to tell you if it will attack different materials.

Sailingdog

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

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #9 of 12 Old 11-16-2006
Junior Member
 
Join Date: Nov 2002
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Try WD 40 and a plastic scraper

Jack Tar
Doug_53 is offline  
Quote Quick Reply Share with Facebook
post #10 of 12 Old 11-16-2006
Reward for lost Kraken!
 
hellosailor's Avatar
 
Join Date: Apr 2006
Posts: 11,445
Thanks: 5
Thanked 131 Times in 128 Posts
Rep Power: 11
   
WD40 is effectively kerosene, it will harm both lexan and plexi unless immediately and thoroughly washed off. Makers of both say simply "never" to get petrochemicals on them. (Long term crazing downline.)
hellosailor is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome