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View product video for Sentinel Rapid Dose Leak Sealer 400ml View product video for Sentinel Rapid Dose Leak Sealer 400ml

Sentinel Rapid Dose Leak Sealer 400ml

Product Code: 60012

You Must Be Over 18 Years Of Age To Purchase This Product.

Sentinel Rapid-Dose Leak Sealer is for internal application to seal small leaks and weeping joints in all types of indirect heating systems. Soft seal normally formed within 24 hours, dependent on temperature and leakage rate. Suitable for use with all metals including aluminium. Compatible with elastomers.

  • Non-Toxic & Non-irritant
  • Compatible with Other Sentinel Rapid-Dose Products
  • High Stability & Readily Dispersible
  • Full Discharge in Approximately 30 Seconds
  • Does Not Block System
  • Rapid Product Addition to All Systems
  • Water Draw-off Not Required
  • System Cooling Not Required
  • Absolutely No Mess
  • View more information

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Safety Data Sheet (COSHH)


4.4444 5 9

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Sentinel Rapid Dose Leak Sealer 400ml 4.4 5 9 9
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
Impressed 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
Amazing fix and so simple too After removing a radiator for decorating, 1 solder joint developed a dipping leak. This product fixed it in minutes as opposed to stripping down the whole section of pipework. The pressure "dosing system" worked without a hitch, putting the product into a fully working and pressurised 9 rad combi based heating system. The clever no return valve and coupling adapter is a brilliant bit of design. Be careful to read all the instructions which are scattered around the tin and 2 sides of an enclosed paper. If you don't open and close valves in exactly the right order, the pressurised system will squirt at you ! The drip stopped soon after the system warmed up. Great product 30 Apr 2014
  • 2015-04-24T13:13:20.163-05:00
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Brand Sentinel
Pack Size 1
Pack Size 1
Product Type Rapid Dose Leak Sealer
Sealant Adhesive Volume 400 ml
Total Product Weight 533 kg