Topic: Tank rust removal.

[Ozzybud]

Good news turned to bad news after treating the CB350F tank with Evapo-Rust. I have included a before and after photo of the inside. I was amazed how clean it got the tank with only soaking  for 3 days.

Then I noticed on the forward edge there was 3 small blisters in the paint. Definitely pin holes coming from the inside out. The outside of the tank is almost flawless with the original paint.

I have some epoxy tank sealer in route. I am hoping to get it sealed up so I can ride it this summer. Does this type of sealer work? I am on the hunt for a decent tank that I can re-paint. Most of the ones on Ebay look worse inside  than mine.

Hopefully the sealer will work for the short term.

[Flyin900]

I use Tech Steel as a great flexible sealer that becomes as solid as steel once set. It can be sanded, filed and worked once it has set hard. It is impervious to gasoline or any diesel etc. I would think that JB Weld makes something close to this. It is a metal epoxy that is workable initially. In the case of Tech Steel it is rock solid in 15 minutes with  a full cure in 1 hr. JB Weld not so much with the quick set up times.
You should be able to use it long term as a pinhole sealant that will not deteriorate with time since I have used it for over a dozen years. I have even rebuilt broken fins on a cylinder or head with a thin wire scaffolding to support the new fin area. It has lasted for years in that set up too.

[Ozzybud]

I use Tech Steel as a great flexible sealer that becomes as solid as steel once set. It can be sanded, filed and worked once it has set hard. It is impervious to gasoline or any diesel etc. I would think that JB Weld makes something close to this. It is a metal epoxy that is workable initially. In the case of Tech Steel it is rock solid in 15 minutes with  a full cure in 1 hr. JB Weld not so much with the quick set up times.
You should be able to use it long term as a pinhole sealant that will not deteriorate with time since I have used it for over a dozen years. I have even rebuilt broken fins on a cylinder or head with a thin wire scaffolding to support the new fin area. It has lasted for years in that set up too.

I am a little hesitant to strip and re finish this tank. I am assuming that the metal is paper thin and with 3 showing now 30 more pinholes are ready to pop through.
I bought some inside of the tank coating (Caswell Epoxy). I am hoping That will seal it up.

[newday777]

Brickhouse Builds on YouTube just did a video on Caswell coating a tank.

[Ozzybud]

Brickhouse Builds on YouTube just did a video on Caswell coating a tank.

Thank you... great video!
Looks like i bought the right product!

[beemerbum]

Good news turned to bad news after treating the CB350F tank with Evapo-Rust. I have included a before and after photo of the inside. I was amazed how clean it got the tank with only soaking  for 3 days.

Then I noticed on the forward edge there was 3 small blisters in the paint. Definitely pin holes coming from the inside out. The outside of the tank is almost flawless with the original paint.

I have some epoxy tank sealer in route. I am hoping to get it sealed up so I can ride it this summer. Does this type of sealer work? I am on the hunt for a decent tank that I can re-paint. Most of the ones on Ebay look worse inside  than mine.

Hopefully the sealer will work for the short term.

How much Evaporust did you put in the tank?

[Ozzybud]

Good news turned to bad news after treating the CB350F tank with Evapo-Rust. I have included a before and after photo of the inside. I was amazed how clean it got the tank with only soaking  for 3 days.

Then I noticed on the forward edge there was 3 small blisters in the paint. Definitely pin holes coming from the inside out. The outside of the tank is almost flawless with the original paint.

I have some epoxy tank sealer in route. I am hoping to get it sealed up so I can ride it this summer. Does this type of sealer work? I am on the hunt for a decent tank that I can re-paint. Most of the ones on Ebay look worse inside  than mine.

100 percent full 3+gallons

Hopefully the sealer will work for the short term.

How much Evaporust did you put in the tank?

100 percent full 3+ gallons.

[newday777]

Brickhouse Builds on YouTube just did a video on Caswell coating a tank.

Thank you... great video!
Looks like i bought the right product!

You are welcome. I just saw it last night.

[Flyin900]

I am a little hesitant to strip and re finish this tank. I am assuming that the metal is paper thin and with 3 showing now 30 more pinholes are ready to pop through.
I bought some inside of the tank coating (Caswell Epoxy). I am hoping That will seal it up.
[/quote]


The Caswells makes better sense for the pin holes in the upper area of your tank. I suspected it was the seam or bottom area of the tank where they are mostly evident on many tanks.

FYI on the Caswells I found it a very thick consistency and poorly coating of the entire tank area easily when the tank was rolled around. I recommend using a thinner as noted in the instructions to thin and allow the material to flow around the interior of the tank easier. Acetone works very well as the thinner for this purpose.

[seanbarney41]

+1 on thinning it...I used it once an did not and it was very difficult to get it everywhere inside.  If you don't get full coverage the gas can get underneath and ruin the lining

[Kelly E]

I have heard many good things about POR-15 tank sealer. It comes with the needed prep cleaners for proper adhesion.

[jaytee-nz]

I've used POR15 many times and it works really well - BUT you must follow their instructions to the letter, especially about the tank being 100% dry before putting the lining product in. It's easy to think it is dry after a few hours but if you check the inside seams, they hold moisture and it takes many, many hours of blowing a heat gun in there to completely dry it out.

[CycleRanger]

I've used POR15 many times and it works really well - BUT you must follow their instructions to the letter, especially about the tank being 100% dry before putting the lining product in. It's easy to think it is dry after a few hours but if you check the inside seams, they hold moisture and it takes many, many hours of blowing a heat gun in there to completely dry it out.

Same, I've used it twice. Good results.

[Ozzybud]

I've used POR15 many times and it works really well - BUT you must follow their instructions to the letter, especially about the tank being 100% dry before putting the lining product in. It's easy to think it is dry after a few hours but if you check the inside seams, they hold moisture and it takes many, many hours of blowing a heat gun in there to completely dry it out.

I am going to use the Caswell system as i have it in my possession. i flushed it thoroughly 3 days ago 3 times with Acetone going to wait a few more until i do the application... keeping my shop 75-80° in preparation.

[RAFster122s]

The seams are critical to be dry before you seal up the tank no matter what liner you use. Trapping moisture leads to very bad results when that moisture causes rust and seal failure.
The POR product reacts with water flash curing and that is a week currently, it doesn't combine with all the water, leading to seam failure...

So, warm that tank up plenty to drive out the moisture in your prep.

Caswell is a good product, as is the POR...

[Don R]

 I did a Fibermold tank with Caswell, it is an old custom fiberglass tank. It holds 3 gallons tank and I had the large kit, so I mixed half of it. I could actually see the product flow through the bottom of the gel fiberglass and knew it was too thick so I mixed the second half of the kit and dumped it all in, thinned a little. I was able to get awesome coverage.
 Caswell is also able to protect the old fiberglass from alcohol.

[seanbarney41]

I did a Fibermold tank with Caswell, it is an old custom fiberglass tank. It holds 3 gallons tank and I had the large kit, so I mixed half of it. I could actually see the product flow through the bottom of the gel fiberglass and knew it was too thick so I mixed the second half of the kit and dumped it all in, thinned a little. I was able to get awesome coverage.
 Caswell is also able to protect the old fiberglass from alcohol.

I also have one of those tanks and another much larger Reed  Titan tank that both need lining.  How much have you actually used your Fibremold tank, Don?