Sentinel Rapid Dose Leak Sealer 400ml
A real time & money saver!
I'm in the middle of a bathroom refurbishment project and have been having trouble with minor leaks in the central heating pipes that will eventually connect to a new heated towel rail.
Unfortunately one of the minor leaks developed into a major one and I had to call out a plumber.
He managed to repair the major leak but pointed out a number of other minor leaks and weeps that still existed in the micro-bore manifolds and suggested that ultimately the whole lot might need to be cut out and replaced and this may be costly.
As I had already bought a can of Sentinel Rapid-Dose Leak Sealer from Screw-fix to use on what were previously just minor leaks and weeps (once the towel rail was installed), the plumber suggested I use it straight away to see if that would fix the problem and avoid any further costly plumbing work.
I followed the directions for dosing via the bleed valve of a radiator, which I found a lot easier than it seemed from reading the instructions (possibly because I also viewed a 'how to' video online as well!).
The only slight hiccup - as other reviewers have mentioned - is the spurting of a little sealer out of the the end of the dosing tube when the discharged can is unscrewed. Also, screwing the can onto the dosing tube in the first place can be a little awkward as you really need to have both aligned perfectly: I can now understand why some commented that you may need an extra pair of hands!
It does appear to take a little longer to discharge the entire can than the 30 seconds stated but even so, the whole operation only takes minutes and avoids the disruption of draining down the entire heating system.
24 hours later, it would seem all the minor leaks and weeps are gone! I will continue to check over the next few days but it would seem that - minor usage quibbles aside - this product not only works as advertised but has the potential to save you many times its cost in plumbing repairs and lost central heating efficiency, not to mention long-term water damage repairs from undetected leaks.
4 May 2015
Sentinel Rapid Dose CH Sealant
Sentinel Rapid Dose Leak Sealer 400ml, supplied with a host of adapters to fit radiator bleed valves.
To fill system, you need to screw adaptor onto can, which can be a little awkward.
Be careful not to drop the small rubber plug. Although it's not actually required. Dropped mine, lost it, but still managed to complete fill with no mess.
Within 12 hours, I'm no longer losing pressure on heating system. So, all good.
13 Nov 2014
"Absolutely no mess"?...Mmmm
Ok, this is a clever way of delivering leak sealant to a pressurised system but don't take at face value the "absolutely no mess" or the Sentinel website video, which neatly misses out the inevitable messy oozing between detaching the tube and re-inserting the bleed valve. I was ready for that...but not for the fact that, although I gave it a good minute to discharge (30 secs recommended), the can was clearly not at all emptied when I'd finished. I would say there was a good 50 to 100ml left and this is almost impossible to contain in the pressurised can. I managed to grab a molegrip to stem the flow, re-insert the tube into the radiator and so get the last bit into the system...but this time I drained off a couple of pints to make it easier, and this is what I'd recommend to do in any case.
Otherwise, a day later, it seems to be working, pressure holding up, fingers crossed...
30 Sep 2014
Very impressed with this. Very clear instructions and surprised by the little rubber bean in the small folded up paper which is designed to acts as a one-way valve in the fill tube. Just put it in via the circuit fill valve. Simple and easy.
Only just put in so dropped a star on reliability - too early to say but other review are good on this aspect.
2 Sep 2014