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bonding FG to MDF, resin or glue?

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Member - Posts: 34
Member spacespace
Joined: May 27, 2005
Location: United States
Posted: June 17, 2005 at 9:04 AM / IP Logged  
definately stay away from glue(s). resin would be your best choice. lay some mat over the mdf and the fg piece, and saturate, saturate, saturate. get the bubbles out though.
Member - Posts: 46
Member spacespace
Joined: May 07, 2005
Location: United States
Posted: June 17, 2005 at 9:26 AM / IP Logged  

How would you get the bubbles out???

Sorry!  I'm learning as I go along.  I new to fiberglassing also.

I love Car Audio!
Copper - Posts: 178
Copper spacespace
Joined: February 18, 2004
Location: United States
Posted: June 17, 2005 at 9:39 AM / IP Logged  

This is what 97blackrodeo is trying to say, and myself also.  Put the fiberglass piece up to the MDF that you want to bond to.  Mark outside line with a sharpie (marker).  Cut or tear some matting to put around the mark and resin the crap out of it.  Immediatley put the fiberglass piece to the MDF before the resin dry's.  Then you can add some layers to the ridge from the MDF to the fiberglass.  To get the bubbles out just keep adding resin and pat the cloth with your brush.  You don't want to brush the resin on, you want to blot, or pat it on to penetrate the material. 

On a side note, I don't see why you can't bond the MDF to the fiberglass with liquid nails, as  you said at the first of the post.  I would also resin the outside or inside of the box for added structural integrity.  You could run a thick bead around the lip of the fiberglass piece and attach it to the MDF.  Be sure to let it dry overnight, and be sure to add some matting around the area that you bonded to. 

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