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Hot Rods Sealing windows?

Discussion in 'The Hokey Ass Message Board' started by gene-koning, Mar 19, 2020.

  1. gene-koning
    Joined: Oct 28, 2016
    Posts: 5,382

    gene-koning
    Member

    I've bought new rubber, and new glass. The rubber and glass have been installed on my car. Its been about a week since the glass has been installed, but there are places between the rubber and the body where the rubber is not laying flat on the sheet metal, and there are places between the glass and the rubber where there is a slight gap between the rubber and the glass. I thought maybe since the car is sitting in my heated shop, the rubber would lay down and seal, but its not happening. The problem is mostly around the sharp corners where the rubber can't make the sharp bends.

    What do I need to do to get the rubber to seal to both the glass and the body? Do I use weatherstripping glue to hold the rubber against the body and the glass?
    The car has to go outside soon, and I really don't want to watch the water sit, or run into the car when it rains. The car sits outside normally. Gene
     
  2. Lloyd's paint & glass
    Joined: Nov 16, 2019
    Posts: 10,434

    Lloyd's paint & glass
    ALLIANCE MEMBER

    Shoot a little windshield urethane between the body and rubber, and tape it down overnight. On the rubber to glass, you can use the urethane also, or black silicone. Cut a small tip on the tube and stick it between the glass and rubber. Run about an 1/8" bead in there. Push the rubber down so the material squeezes out. Clean up the squeeze over with a razor blade, then tape the rubber down to the glass if there's a gap. Take the tape off tmrw :D
     
    stillrunners and nochop like this.
  3. manyolcars
    Joined: Mar 30, 2001
    Posts: 9,552

    manyolcars

    Silicone sealer ingredients include an acid that will attack the metal
     
  4. Lloyd's paint & glass
    Joined: Nov 16, 2019
    Posts: 10,434

    Lloyd's paint & glass
    ALLIANCE MEMBER

    That's why i said to use urethane between the rubber and body. Never put silicone against paint or metal. Seen it done so many times with destructive results in my 30 years of bodywork and autoglass experience.
     
  5. gene-koning
    Joined: Oct 28, 2016
    Posts: 5,382

    gene-koning
    Member

    Does windshield Urethane come in a squeeze tube, or a caulk gun tube? Where would I get some? All the guys at Orielly's wanted to sell me was silicone stuff. Gene
     
  6. s55mercury66
    Joined: Jul 6, 2009
    Posts: 4,367

    s55mercury66
    Member
    from SW Wyoming

    Go talk to your local windshield place, and ask them for a tube that will fit in a caulking gun. It can be pretty stiff coming out, though.
     
  7. alchemy
    Joined: Sep 27, 2002
    Posts: 22,312

    alchemy
    Member

  8. Lloyd's paint & glass
    Joined: Nov 16, 2019
    Posts: 10,434

    Lloyd's paint & glass
    ALLIANCE MEMBER

    I've never seen it packaged any other way than in a tube. You should be able to get 3M window weld at the parts house, it's a thinner viscosity. The high viscosity is fir supporting the weight of the window so it doesn't sink to the pinchweld. But if you use HV, just warm the tube up good and you'll be able to pump it with a hand pump caulk gun.
     
    Jokester likes this.
  9. X3 on Urethane but have plenty of towels/rags and lacquer thinner handy, that sh*t goes everywhere ya don't want it to.
     
    stillrunners likes this.
  10. I've used a dab of super glue between the paint surface and the rubber.
     
  11. Casey Riley
    Joined: Jun 27, 2018
    Posts: 543

    Casey Riley
    Member
    from Minnesota

    Black silicone can be used to fix rubber molding. You can contour it very nicely with a plastic spoon as you you keep cleaning the silicone off the spoon after each pass of "sculpting".
     
  12. Casey Riley
    Joined: Jun 27, 2018
    Posts: 543

    Casey Riley
    Member
    from Minnesota

    Oh man, I didn't know that silicone can cause damage. I've done it a handful of times.
     
  13. Lloyd's paint & glass
    Joined: Nov 16, 2019
    Posts: 10,434

    Lloyd's paint & glass
    ALLIANCE MEMBER

    Silicone works great as a sealant, not so much as an adhesive. And the acidity will eat paint causing corrosion. But it's a good quick fix
     
  14. gene-koning
    Joined: Oct 28, 2016
    Posts: 5,382

    gene-koning
    Member

    Thanks guys, I'll see what I can find. Gene
     

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