PVC Curing Agent

[oldgit]

PVC Inflateable.
In the heat the rubber mouldings securing the grab ropes on one of the tubes literally fell off.
Have 2 x half empty tins of the glue but no curing agent.
The price of a replacement 10ml bottle is not outrageous but by the time you add £8.00 for P&P ?
What is the curing agent ? and can it be purchased unbranded for sensible money
...or does one just bite the bullet.
A complete kit is not much more expensive.

 

[greeny]

PVC Inflateable.
In the heat the rubber mouldings securing the grab ropes on one of the tubes literally fell off.
Have 2 x half empty tins of the glue but no curing agent.
The price of a replacement 10ml bottle is not outrageous but by the time you add £8.00 for P&P ?
What is the curing agent ? and can it be purchased unbranded for sensible money
...or does one just bite the bullet.
A complete kit is not much more expensive.

I have the same issue but for hypalon adhesive. Being in Portugal makes it more difficult to find. Most things I can source either locally or from Spain, Italy, France etc but this is beating me.

 

[oldgit]

Bought a complete new PVC kit £19.95 from my local chandlery.
Bottle of catalyst inc P&P £13.95.

 

[Fr J Hackett]

The catalyst is usually an organic peroxide often Benzoyl peroxide but without knowledge of the polymer base that the "glue" is composed of you can't tell. I would have thought the ingredients should be listed on the containers.

 

[oldgit]

The catalyst is usually an organic peroxide often Benzoyl peroxide but without knowledge of the polymer base that the "glue" is composed of you can't tell. I would have thought the ingredients should be listed on the containers.

Previous use ensures that anything printed on the tin or bottle disappears into a smeary mess.

 

[Fr J Hackett]

Previous use ensures that anything printed on the tin or bottle disappears into a smeary mess.

If you mean the catalysed glue ( polymer) becomes a softened stick mess that indicates that the polymerisation was incomplete which could be for a number of reasons.

 

[Graham376]

According to label, the Polymarine pvc adhesive curing agent contains ethyl acetate, diphenylmethane, disocyanate, isomers and homologues, all meaningless to me but no doubt someone here will know alternatives.

What I have found with previous dinghy is once fittings start falling off, regluing is only a temporary fix before they fall off again.

 

[VicS]

Bought a complete new PVC kit £19.95 from my local chandlery.
Bottle of catalyst inc P&P £13.95.

Preparing the PVC with the solvent cleaner is an important part of successfully gluing PVC.

Rubber components , namely your grab rope attachments, must be primed with Hypalon adhesive because the PVC adhesive does not stick to rubber.

You'll, therefore, also need the solvent cleaner ( which is a mixture of MEK and tetrahydrofuran, the latter being a solvent for PVC) and some Hypalon adhesive. Alternatively replace the rubber components with PVC ones.

See the full details of using the PVC adhesive here

https://www.polymarineshop.com/wp-content/uploads/2023/02/AdhesiveGuide-PVC-UK-Master2023.pdf

.

 

[oldgit]

Removed all the old original manufacturers adhesive which failed , by abrasion and then wiped with solvent cleaner, now just keeping my fingers crossed.