Hi-Temp paint

[GDBD59]

Can someone recommend a paint they have successfully used on an exhaust manifold?

I have a long-tubed 4-branch made of low-grade stainless that I bought used. The surface is pitted. I had it sandblasted & painted by a commercial powdercoater (because I'm crap at painting). I gave him a tin of 750C Rust-oleum. Supposedly my manifold will get to approx 650C.

It wasn't fitted for some time (mistake......???) & as soon as it started to heat up the paint bubbled & flaked.

I've had things ceramic-coated before......I don't fancy the cost again.

So does anyone have experience of a paint that works?

[GreenV8S]

The manifold on my V8S is a 4-into-1 fabricated tubular manifold, probably similar to yours. It's made from slightly stainless steel, probably also similar to yours.

I had it professionally blasted and then painted it myself with Techline Black Satin. It's held up for the past 25 years, including some time running with forced induction.

It's important to note that the initial heat cycles must not get too hot so the engine needs to be running reasonably well before you apply the paint - if you overheat it while it's curing, it will probably fail. Perhaps that's what happened to the paint you applied previously.

[GDBD59]

GreenV8S said:

The manifold on my V8S is a 4-into-1 fabricated tubular manifold, probably similar to yours. It's made from slightly stainless steel, probably also similar to yours.

I had it professionally blasted and then painted it myself with Techline Black Satin. It's held up for the past 25 years, including some time running with forced induction.

It's important to note that the initial heat cycles must not get too hot so the engine needs to be running reasonably well before you apply the paint - if you overheat it while it's curing, it will probably fail. Perhaps that's what happened to the paint you applied previously.

Thanks (Aston?....lucky man)....... there was no curing instructions on the tin, & it basically bubbled 'immediately'. I have read about one paint where the curing is very detailed, 2 or 3 stages.

Is the Techline brush or spray?

[GreenV8S]

GDBD59 said:

Is the Techline brush or spray?

I brushed it.

(TVR btw.)

[GDBD59]

I'll need help from a friend then.....
(still lucky. )

[austina35]

On my Rover V8 manifolds I used B&Q heat resistant paint. It has been on there for 2 years and is still on there. Paint is about £14 and it's basically used for painting barbeques.

[s p a c e m a n]

I used that rustoleum stuff on my chimaera, it sort of worked but I don't rate it and wouldn't use it again. A shame as most of their other products are really good

[droopsnoot]

austina35 said:

On my Rover V8 manifolds I used B&Q heat resistant paint. It has been on there for 2 years and is still on there. Paint is about £14 and it's basically used for painting barbeques.

I've heard others saying this is good stuff. I've used VHT paint before now and it's come off while I've been re-fitting the manifold. I did heat it up for a while to help it dry, but maybe I didn't do it for long enough or get it hot enough.