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Most Recent Questions
Recent Question:
can this be used on a thermostat cover to instead of a gasket???
Recent Question:
Is this material suitable for forming seals/gaskets in drinking water systems?
Recent Question:
fuel tank sender unit
Recent Question:
I 'm loosing cooland and I get white smoke from the exhaust when I start engin from cold but it stops within a mile I suspect a faulty head gasket wil
Questions with Most Recent Answers
Question:
I have an Audi TDI, which has a catalytic convertor. Is this product compatible? Thank you
Question:
How long does Gun Gum take to properly harden
Question:
will Radweld seal a leak in an electric hot water heater (over a sink)
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Hello I own a 2005 Audi A6 2.4 V6 Petrol would this product be suitable to help with a small coolant leak for my car. I want to know before I go ahead
Question:
does radweld use thick substances like Bars leak?
View all questions > Workshop & Tools Q & A > Garage Equipment Q & A > Head Gasket & Exhaust Repairs Q & A

Customer Questions & Answers for
Holts Holts Gun Gum Putty 200g

Fix your car exhaust at home with Gun Gum Paste.
Customer Questions & Answers:
4 Questions
 | 
12 Answers
Overall Rating:
4.565 out of 5
4.6
out of
5
Product Details

Questions & Answers for Holts Holts Gun Gum Putty 200g

Question
How long does Gun Gum take to properly harden
asked 5 years, 5 months ago
by
billybanjo
 - North Wales
on Holts Gun Gum Putty 200g
5 answers
Answers
answer 1
I found it takes about two days to go completely hard. I used the bike "lightly" after the first day. I applied the putty to a hot exhaust to speed hardening.
answered 10 months ago
by
Anonymous
 - London, UK
answer 2
I'd reccomend Leaving it overnight, then the next morning, will be like new.
answered 1 year, 3 months ago
by
DevsT4
answer 3
Most people recommend leaving it overnight, running the engine at idling speed for 10 minutes or so after applying the fix will help it harden, but still leave it a good few hours before running the engine at too higher speed otherwise the pressure is likely to push the plug out.
Age Group: 35 - 44
Gender: Male
Attitude to Shopping: Quality Seeker - I'd rather spend a little extra on something if I know its going to last
Family: I'm Living with Partner/Spouse - With Children
Attitude to Car Maintenance: Enthusiast
How many cars: 1
Best Answer
answered 1 year, 10 months ago
by
simon1976
 - Worthing,Sussex
answer 4
20 minutes, i used product and am very happy with outcome,
answered 4 years, 5 months ago
by
bri72
 - fareham
answer 5
In general this product takes about 24 hours to harden, however this is dependant on number of factors: 1. Environment (cold-wet [winter] versus warm-dry [summer]) 2. How much product is used by the consumer 3. Where on vehicle it is applied, etc.
Staff Answer
answered 5 years, 5 months ago
by
HalfordsWebTeam
Question
will this repair a cracked manifold
asked 6 years, 1 month ago
by
mikki69
on Holts Gun Gum Putty 200g
4 answers
Answers
answer 1
used on my cracked manifold and worked well 3 weeks and counting
answered 1 year ago
by
cpfcnick
answer 2
For my car I put it on over night and as the exhaust got hotter when i drove the next day it was hard and fine
answered 1 year, 11 months ago
by
Lummy1985
answer 3
Yes, but I don't know how long it will last.
Best Answer
answered 4 years, 3 months ago
by
aaaaaaab
answer 4
No, this is not suitable for your purpose.
Staff Answer
answered 6 years, 1 month ago
by
HalfordsWebTeam
Question
Is this suitable to reseal a rear joint which is blowing?
asked 4 years, 9 months ago
by
JoeP92
 - Swindon
on Holts Gun Gum Putty 200g
2 answers
Answers
answer 1
Yes, smooth off the area effected, apply the putty, covering all of the area, smooth the putty with a damp cloth and leave overnight, your exhaust will be like new and no more blowing.
answered 1 year, 3 months ago
by
DevsT4
answer 2
This is designed to repair small holes and leaks in silencers and exhaust systems.
Staff Answer
answered 4 years, 9 months ago
by
HalfordsWebTeam
Question
can this withstand high temperatures of a 2 stroke engine?
asked 5 years, 11 months ago
by
Anonymous
on Holts Gun Gum Putty 200g
1 answer
Answers
answer 1
Holts Gun Gum Putty 200g is a Sodium Silicate which has a melting point of just over 1000C. This means that it should be able to cope with any temperatures produced by an engine.
Staff Answer
answered 5 years, 11 months ago
by
HalfordsWebTeam
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