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Most Recent Questions
Recent Question:
Bonding various materials
Recent Question:
I am thinking of using wondaweld as a temporary fix in my motorbike for a few months till I have time to dismantle it.
Recent Question:
Is this petrol and diesel proof?
Recent Question:
inlet manifold gasket
Recent Question:
Could this product cause problems with welding the rad should that become necesary?
Questions with Most Recent Answers
Question:
Bonding various materials
Question:
I am thinking of using wondaweld as a temporary fix in my motorbike for a few months till I have time to dismantle it.
Question:
Is this petrol and diesel proof?
Question:
Could this product cause problems with welding the rad should that become necesary?
Question:
Hi I want to seal an oil sump with this how much do I use and how long do I need to leave it to dry before I can put oil in my engine and start it?

Customer Questions & Answers for
Holts Holts Wondarweld 500ml

Holts Wondarweld permanently seals cracked cylinder blocks, internal and external leaks in water jacket.
Customer Questions & Answers:
5 Questions
 | 
6 Answers
Overall Rating:
4 out of 5
4
out of
5
Product Details

Questions & Answers for Holts Holts Wondarweld 500ml

Question
Will this product be suitable for sealing any minor leaks of exhaust into the cooling system, caused by a defective head gasket?
asked 1 year, 7 months ago
by
2lancialan
on Holts Wondarweld 500ml
2 answers
Answers
answer 1
depends if its gone or just on its way out .. also if the thermostat is easy to get to
answered 1 year ago
by
andys4x4
 - wolverhampton
answer 2
As with any of these products they are not a miracle cure but can treat minor leaks. However if a head gasket problem is suspected a vehicle technician should be contacted to asess how bad the problem is to aviod further damage to the engine.
Staff Answer
answered 1 year, 6 months ago
by
HalfordsWebTeam
Question
Will this fix this problem please?
I have a Audi A4 51Reg, the oil has been used/burnt extremely fast(say every 300miles), and the water level is going down at the same time but not as fast as the oil level, no creamish stuff in the oil cap. Not sure itf it is a blowning head gasket or crack cylinder head, had a mechenic had a quick look cant see any leaks, so suspect it would be one of those two(gesket or head), will Holts Wondarweld fix this please? (The car has done 115000 and dont really want to spend 000s to fix). Thank you
Car Make: Audi A4
asked 8 months ago
by
metalwolf
on Holts Wondarweld 500ml
1 answer
Answers
answer 1
The Holts Wondarweld permanently seals cracked cylinder blocks, internal and external leaks in the water jacket. It might be worth trying but it sounds that you may need a qualified mechanic to look at your problem.
Staff Answer
answered 8 months ago
by
HalfordsWebTeam
Question
holts wondarweld instructions
i bought a 500ml bottle of holts wonderweld in the uk and brought it out to spain to use in my car here,however when i got it home there were no instructions in the box ,is it possible you could post them here or email them to me as iv read on forums that its quite complicated to use correctly !!!
Car Make: citroen saxo
asked 7 months ago
by
bruceisspain
on Holts Wondarweld 500ml
1 answer
Answers
answer 1
Please contact customer services on the following number so that they can forward information to a contact address for you.

Call 08450 579 000 (open Monday - Friday from 08:45-18:00, Saturday from 09:00-17:00 and Sunday from 10:30-16:00).
customer.services@halfords.co.uk
Staff Answer
answered 6 months ago
by
HalfordsWebTeam
Question
Will I also need to change the oil?
I am thinking to try this on my car, at least to give it a few more months until I might be able to replace it, as getting a new head gasket costs a fortune. I'm changing the thermostat too as this was the underlying problem. As there is evidence of 'the cappucino effect' under the oil cap will I need to change the oil too to give this a hope of working?
Attitude to Shopping: Quality Seeker - I'd rather spend a little extra on something if I know its going to last
Attitude to Car Maintenance: Novice
How many cars: 1
Car Make: Citroen Saxo
asked 2 months, 3 weeks ago
by
FrogPrincess
on Holts Wondarweld 500ml
1 answer
Answers
answer 1
Hi, thanks for your interest in Holts Wondarweld 500ml. Changing oil before will have no effect on Wondarweld being able to seal the leak or not. As it’s water in oil, it would be best to change the oil after using Wondarweld to make sure there is no Wondarweld or coolant/water. The mixture of water and Wondarweld must not run into the oil. If the engine oil is red coloured, stop the engine and change the oil immediately.
Staff Answer
answered 2 months, 3 weeks ago
by
HalfordsWebTeam
Question
I am thinking of using wondaweld as a temporary fix in my motorbike for a few months till I have time to dismantle it.
I am getting slight capuccino effect on radiator cap and water level drops over time. First do you think it will work in a mototrbike and second Will this product clog up the waterways causing further problems?
Age Group: 45 - 54
Gender: Male
Car Make: Triumph Tiger m/bike
asked 1 month, 1 week ago
by
Anonymous
on Holts Wondarweld 500ml
1 answer
Answers
answer 1
Hi, thanks for your interest in Holts Wondarweld 500ml. Using this product should not block waterways in a motorbike engine but we recommend trying Holts Radweld Plus first, this looks like it might be a porous cylinder head problem and Radweld Plus is easier to use and worth a try. You can locate this product on our site by entering 166770 in the internal search bar.
Staff Answer
answered 1 month ago
by
HalfordsWebTeam
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