Glue transom back into an inflatable?

prv

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I have a somewhat elderly 10ft Bombard I bought off eBay this spring. It's a bit tatty, and the solid ply floor is a bit of a pain, but that apart it gave good service the few times I've used it. It's much more convincing as a boat than some charter tenders I've used.

However, after the last use I left it inflated on my patio, meaning to repair a couple of minor leaks. It sat there longer than expected, as the weather turned and I kept waiting for a long enough dry spell at a convenient time. During that time, given the aforementioned leaks, it deflated. As it went down, the tubes seem to have peeled themselves away from the edges of the transom.

The transom is still attached, apparently firmly, across the bottom. It still has the rubber parts up the edges which fair it into the tubes. These end in a 2-inch-wide (from memory; it's been folded up an packed back in the shed for weeks) curved face to which the tube should be bonded but isn't.

Is it feasible to repair this? On the face of it it seems like it should be a simple matter of degreasing the parts, applying suitable glue, then somehow contriving to press the two together. But I seem to remember someone saying "once the transom falls out the dinghy is dead", and I don't want to bother if these repairs inevitably fail. If nothing else, I wouldn't want the as-new outboard to end up getting dunked as the transom it's clamped to falls over.

If it can be fixed, is the Polymarine PVC sold in Force 4 the right stuff, or is there something better? I guess epoxy is too rigid.

Cheers,

Pete
 
Cheers to Vic and BigWow - I didn't know there was 2-part PVC adhesive.

For some reason things always seem like they'll work better if they're more complicated to use :D

Pete
 
I can vouch for the 2-part adhesive being the better option. Used both the 1 part and 2 part on my 3mtr ML Lifeguard Inflatable. Used the 1 part to secure new Rowlocks and went for the 2 part to fit new strapping to hold a wooden seat as the inflatable never had one when I bought it. The adhesive has held nicely despite my bum and 13 stones on the seat for an extended period.

Couldn't honestly say how effective it would be to hold the Transom to the fabric though, I would echo the call to phone Polymarine, they have the experience!
 
Were you able to fix it? Or do you intend to try? Or do you reckon it's past repairing?

Pete

I hadn't any intention of throwing it away! we did a temp repair with Sikaflex, it's just about usable, but did wonder what to do otherwise.
 
I glued the transom back into a Zodiac which is made by the same company as Bombard. I glued the rubber 'boots' back onto the wooden transom and then the boots onto the sponson. I used 2 part adhesive from a Zodiac supplier in Leeds (MGA?). Very effective, still perfect after more than 10 years.
 
Follow on question . . .

My old & much lovd Maestral got trapped under the boat as the tide came in & the plywood transom split vertically. None of the rubber seals came away. I have often thought of replacing the transom, but how do I get the rubber off the old transom so I can glue the new one in using the same seals (they will at least still perfectly glued to the sponsons)?
 
Follow on question . . .

My old & much lovd Maestral got trapped under the boat as the tide came in & the plywood transom split vertically. None of the rubber seals came away. I have often thought of replacing the transom, but how do I get the rubber off the old transom so I can glue the new one in using the same seals (they will at least still perfectly glued to the sponsons)?

It's made of Hypalon I believe.

If so you can use a hot air gun to soften the adhesive and separate the joint

Although Polymarine do not list the Maestral dinghies they do suggest ways of identifying the material. SEE HERE

Do not try heat on PVC .. you will melt it!
 
Hmm - which Sikaflex is it the same as? I keep 291 in the shed, but think of it as more a sealant than an adhesive. 292 is the adhesive one, which I've not used but could get.

Pete

I think it depends on whether they put the wording "Adhesive" or "Sealant" or "Adhesive and Sealant" on the tube.

Yes there are differences but have found most grades to have the properties of both.
 
In my experience there is nothing quite like 5200.
Sikaflex 291 is supposed to be the equivelent - a one part polyurethene-based flexible adhesive sealant. 292 is an adhesive without the sealing qualities - whatever they may be. It's not recommended for skin fittings, for instance.
 
So does the panel think I should be using 5200 rather than two-pot-and-solvent PVC adhesive for this job?

Pete

I would (as someone else suggested) talk to Polymarine and use their 2 part adhesive. Alternatively, ask them for a price for doing the job - although they're now in smaller premises I think they may still do repairs.
 
Alternatively, ask them for a price for doing the job - although they're now in smaller premises I think they may still do repairs.

Their website suggests they do, but it seems unlikely the price would be worth it for such a decrepit old dinghy. Might perhaps work out ok if they were based in Southampton and I could drop it round, but not once you add postage to North Wales and back.

Pete
 
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