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Old 29 July 2006, 06:06   #1
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Sticking velcro to pvc sheeting.

I am having immense problems in sticking velcro( non -stick backing) to PVC sheet to make a cover for the RIB. Both materials are flexable and non absorbant

- have tried contact type glues ( rubber- based / acetone solvent based)
- Mastic type filler glues

At the moment all results are negative. At best they stick but can easily be peeled off.

Anybody had a similar problem and/ or solution.??.

Thanks
Jonathan
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Old 29 July 2006, 07:08   #2
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stich it to a patch, then glue the patch down.
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Old 30 July 2006, 02:04   #3
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Have you tried a glue for PVC tubes? Clifton urethane adhesive, Sta-Bond, VynaBond, Aquaseal; any of these (or other similar urethane adhesive) should work.

Rough up the PVC, hit both sides with a solvent to strip off any remaining oil(acetone or MEK should work), and glue per product directions.

If you use something like Aquaseal (a urethane glue that has a liquid accelerator), you can cut it with something like 2:1 or 3:1 acc to glue which will allow it to soak into the velcro fabric backing a bit better. Then glue per directions using the aquaseal coat as a prepared surface.

You might also try adding biggish reinforcing patches, and riveting (or grommeting) the velcro on.

Luck;

jky
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Old 30 July 2006, 07:40   #4
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Thanks for advice/help everybody. Will try some test strips to see what is the best.

Yesteday tried ( for the first time ) "superglue" ( CN based ) and could not get it off, and I am not exactly week with my hands- as a lot of the female species will testify . However the cost is ( in belgium )- 15$ for 20g pot.-is going to be expensiive - i have to stick a velcro strip 2" wide - 25feet of the stuff onto the pvc.

Normally I would have used my wifes sawing machine- but its needs repairing.

Jonathan
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Old 30 July 2006, 17:16   #5
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Quote:
Originally Posted by eupa
Yesteday tried ( for the first time ) "superglue" ( CN based ) and could not get it off

Hmmm. but you need to be aware tha cyanoacrylate based glues (superglues) are not designed for use in situations where they may get wet. They tend to take up water and eventually fail completely. I'd carry on looking.

Have you tried two-part polychloroprene glues like bostik 2402. You paint some on both surfaces and then press together when almost dry. Wetsuit manufacturers use it a lot

Andrew
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Old 30 July 2006, 17:18   #6
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Quote:
like bostik 2402
Not on flexible PVC.
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Old 31 July 2006, 04:51   #7
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thats really my problem- I have a rubber back velcro-and PVC Both are non absorbant- and thanks for the tip of the superglue about water- hadn't thought about that-

Just finished repairing the sawing machine. Perhaps in this day and age of high sophiticated bonding techiniques -I will have to revert to stiching which was invented millions of years ago.
\
Jonathan
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Old 31 July 2006, 06:45   #8
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You didn't say your velcro had a rubber backing. You could use the method for sticking hypalon to PVC. You need to 'prime' the pvc with pvc adhesive and prime the rubber with Bostik 2402. After they have cured, you can use either glue to join them.
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Old 31 July 2006, 08:28   #9
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PVC Adhesion

Stelmax PVC solvent adhesive - it sticks Tek-Dek together, which is made from PVC. We used to have loads of problems with glues but Stelmax is the answer. If you are looking for a sika type glue then we also use Simson ISR70-03 - By far the best non-solvent bedding compound I have seen or used.

The Stelmax is 4.80 a tube, stinks just like superglue

The Simson is 10.50 a cartridge.

Anyone who has fitted Tek-Dek should testify to the strength of the Stelmax.

I hope this helps.
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Old 31 July 2006, 12:53   #10
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thanks Dacosta/JW
Will try them out.

Jonathan
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