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Internal Leak Sealer for small inaccessible leaks and weeping joints in all types of indirect heating systems including those containing aluminium components. Compatible with elastomers.

Internal Leak Sealer for small inaccessible leaks and weeping joints in all types of indirect heating systems including those containing aluminium components. Compatible with elastomers.
Average Customer Rating:
4.571 out of 5
4.6
 out of 
5
(7 Reviews) 7
Open Ratings Snapshot
Rating Snapshot (7 reviews)
5 stars
5
4 stars
1
3 stars
1
2 stars
0
1 star
0
6 of 7(86%)reviewers would recommend this product.
Customer Reviews for Sentinel Internal Leak Sealer 1Ltr
Review 1 for Sentinel Internal Leak Sealer 1Ltr
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Great product
28 May 2013
By Grenner
, Peterborough
"Used to solve a leaking compression T which was in a difficult to get at location and would have required a drain down and new inhibiter. The leak was generating approx. 1 pint every 3-4 hours to give you an idea.
The liquid is very thick, I drained a few of pints from a rad in a tiled area and removed the whole bleed valve and used a 6inch cut of garden hose with a funnel to get it directly into the system. Took a good 5 mins to get it all in. Let the heating run on a boost and by 30mins the leak had virtually dried up and after 1 hour was good to go. Saved hours of work and wasn't looking forward to recharging the whole system, and bleeding it out. They didn't have the Fernox product in stock at my branch but am very pleased with the performance of this"
1 of 1 people found this review helpful.
Review 2 for Sentinel Internal Leak Sealer 1Ltr
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Great leak sealer
4 May 2013
By dnak
, London
"bought this to seal a small leak that i had on an inexcessable pipe and it did the job"
Review 3 for Sentinel Internal Leak Sealer 1Ltr
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Leak Sealer without hustle
4 Mar 2012
By 24hrplumber
, London SW
"excellent product to repair small leak under tailed floor without removing anything. Quick and easy."
Review 4 for Sentinel Internal Leak Sealer 1Ltr
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
bala
29 Mar 2011
By bala
, hayes
"every 2 days my boiler pressure went down to 0. after i put sentinel in the system pressure remain same. best one"
4 of 4 people found this review helpful.
Review 5 for Sentinel Internal Leak Sealer 1Ltr
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
4 out of 5
4 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
4 out of 5
4 out of 5
Very good purchase
9 Dec 2008
By redz
, Diss, Norfolk
"This product is very good if you have an underfloor leak you cannot find. Great problem solver.
Works on sealed system as well as open vented. The chemical doesn't damage any T.R.V 's.
"
1 of 1 people found this review helpful.
Review 6 for Sentinel Internal Leak Sealer 1Ltr
Overall Rating: 
4 out of 5
4 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
4 out of 5
4 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Sealed some invisible leaks
15 Jun 2013
By loft
, Sussex
"Added this to a customer's sealed heating system which kept losing pressure but no visible leaks, now it's fine."
Review 7 for Sentinel Internal Leak Sealer 1Ltr
Overall Rating: 
3 out of 5
3 out of 5
Value: 
3 out of 5
3 out of 5
Features: 
2 out of 5
2 out of 5
Performance: 
3 out of 5
3 out of 5
Reliability: 
3 out of 5
3 out of 5
Would you recommend this product? No
Overall Rating: 
3 out of 5
3 out of 5
Value: 
3 out of 5
3 out of 5
Features: 
2 out of 5
2 out of 5
Performance: 
3 out of 5
3 out of 5
Reliability: 
3 out of 5
3 out of 5
Try the no nonsense
1 Oct 2008
By Patmcd
, Bellshill
"Got this leak sealer , but compared to the No Nonsense it is very watery didn't perform as well as expected Wouldn't buy again"
1 of 2 people found this review helpful.