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Repairing/bonding glass to convertable hood?

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by leegsi, Jan 21, 2014.

  1. leegsi
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    leegsi Active Member

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    [Jan 21, 2014]
    The bottom corners of my my hood have become unbonded between the screen and material.

    Is it diy repairable and if it is any guides and what to use?
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  3. AuAudiA4
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    AuAudiA4 New Member

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    [Jan 24, 2014]
    Use 3M™ Marine 5200 Adhesive Sealant. High-performance polyurethane adhesive sealant [FONT=arial, sans-serif]that stays flexible and waterproof, yet resists weathering and salt water. This stuff is super strong and will do the job. Downside is the curing that takes about a week +.[/FONT]

    The hardest is to find good pillows to put inside the window. They need to be hard and the best is if you can get inflatable that fits between the head rests and window.



    Do the repair sooner than later, it will only go worse.
    Last edited by a moderator: Aug 15, 2014
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  4. leegsi
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    leegsi Active Member

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    [Jan 25, 2014]
    Can only find it in the USA and not in the UK.
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  5. AuAudiA4
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    AuAudiA4 New Member

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    [Jan 25, 2014]
    This link may help you to locate one. (No I'm not a 3M sales man) Google is my friend.
    Where To Buy - Boat Building and Maintenance > Buy offline

    If you are using tape to mask etc. don't use gaffer/duct tape. It leaves glue residue when removed. Use masking or clear packing tape.
    Use a black marker to make a line on the glass where the fabric goes with the top fully closed. This makes it easier to see where to apply the glue. Remember less is more with this stuff. :icon_thumright: In the instruction movie, he is using way to much. This stuff is 4-5 times stronger then silicone. Also because it's slow you can add more, but it's a pain to remove. cover and protect as much as you can and get someone to help you with a hand to keep the frame up and steady when you do it.

    Did I say - clean, dry surfaces and 1 week to cure.

    Some extra info about the 5200 strength. [video]www.youtube.com/watch?v=dqvApS3SoSQ[/video]
    The best of all, you can get it in black, most common for soft tops.

    Good luck!
    Last edited: Jan 25, 2014
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  6. Cabbyfan
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    Cabbyfan Member

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    [Feb 2, 2014]
    Mine failed in both corners, about 6 to 8 inches both sides. I used clear builders silicone for now and it's been fine even in all this rain. Bought some gorilla glue for a proper fix once its warm and dry again. If all else fails I have a brand new outer skin in the loft I picked up very cheap on ebay.
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  7. leegsi
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    leegsi Active Member

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    [Feb 3, 2014]
    Got a repair guy coming out to look at it this week.
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  8. AuAudiA4
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    AuAudiA4 New Member

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    [Feb 10, 2014]
    Please do not use silicone! there are two reasons.
    1. Silicon is acid - you can smell it. This can create corrosion.
    2. Silicon leaks oil. It will be almost impossible to repair again. The silicon oil will stay forever in your fabric.

    Gorilla glue is first time, every time.
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  9. AuAudiA4
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    AuAudiA4 New Member

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    [Feb 10, 2014]
    I have been investigating a bit more and found that polyurethane adhesive is not good if exposed for UV (Sun light) :keule:
    It may work if the glass has a blackout border. The part exposed to sun will go soft and sticky after some time. And we are talking about a repair that should last for at least 10 years.

    Sika have some auto glass products, I have to investigate them.
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  10. Cabbyfan
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    Cabbyfan Member

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    [Feb 10, 2014]
    I had no choice at the time, had to seal it quick. I will do gorilla glue as soon as the weather is warm enough :)
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