Preventative Treatment of Undercorrosion?

Currently reading:
Preventative Treatment of Undercorrosion?

Joined
Aug 8, 2006
Messages
3,884
Points
707
Location
Ayr, Scotland
Ok so that time of year again and I'm wanting to make sure that my nice 'new' Bravo HGT stays nice for yrs to come and doesnt rust away at the sills etc. So whats the best preventative treatment, pressure washing, applications etc i can be doing to keep her at her best!
 
wrong time of the year realy, to damp and wet, for waxoiling rust prevention etc, i would powerwash any mud, dirt, from under the wheel arches, and wax it and get ready for even worse weather SNOW! then when the snow shifts clean all the salt grit again from the underneath and wait till the warm weather comes and get it waxoiled (dinitrol) (or used engine oil if you a skinflint) in all cavities, sills, door bottoms etc all cavities, it must be bone dry tho, even on a hot day theres condensation in all your panels thats why cars rust inside out theres 5 litres of the stuff on my UT keep the tinworms away he he! good luck ant!
 
My advice, do it the best you can now to prevent any more damage this winter, then do a really good job in the summer. Dinitrol in the cavities and around seams, buy an el cheapo spray gun.
 
won't be dry till summer just drive it and enjoy. i also advise against powerwashing engine bays as there are so many sensors, electric components etc, unless cleaning up for oil leak, seen loads of probs in the past nothing wrong in a dirty engine the coat of dirt and oil keeps out the damp squirt wd40 over everything and get ready for even worse weather good luck hope she a good servant for you Ant!
 
Im not surprised it didn't that must be 7kg of the stuff and about 2in thick, as it comes out like treacle, a tip is to warm it up till its runny and then blast it everywhere, you get a lot of coverage ( tight wads, and old timers use old engine oil) and seems to give a level of protection, Ant!
 
i use waxoyl with my compressor and sprayer, but its too late to do it now, its a summer job. if you do it now and get damp or salt trapped under the sealant you will only accelerate the corrosion.
if you must do it now you need to clean the arches and underbody with sugar soap, then get it perfectly dry (at least 24hrs in warm garage to dry), then spray it somewhere warm and dry (garage), and leave it for another 24 hours before driving. also remeber to mask off the rest of the car because accidents happen, and undersealants are hard to remove from paintwork and trim, trust me i've made this mistake more than once and it wont happen again.

also remember that any existing corrosion needs to be treated before you apply the underseal, if you dont do this it will still rot. easiest way to treat rust patches is to get a wire brush bit for a drill to reomve the excess corrsion, then apply some rust treatment gel such as jenoseel. this needs to be done some time before the underseal is applied, and only once the car is dry, but its an important stage so its worth the hassle and time.
 
Last edited:
The Dinitrol I use is 3125 brown, sprays easily and you can see where you have covered. I'll say it again, you can do some good even on a wet car and these treatment build up, a bit of dirt mixed in with them does no harm so long as it's saturated with preservative.. I wouldn't use WD40, it's too expensive and washes off very fast, it isnt even a good penetrating oil (not surprising as it wasnt designed as one) I use 3 in one penetrating spray for that, but if you do, as flump says it will do no harm at all when you use the Dinitrol/Waxoyl.
 
How do I apply this stuff??? I've phoned up a compressor company and there looking for £420 for a compressor that runs at 10 CFM at a constant 85psi (I dont even know what this means!) :D

But is there a cheaper method I could you to apply the stuff? cheers
 
Back
Top