Question 1

I know that i have to remove the petrol tap, but do i need to remove the fuel level sender unit also?  and - what did you guys block the holes with?

Accepted Answer

I kept the fuel sender unit in place with its gasket, as this provided the perfect seal. Of the three other holes,
the two smaller breather holes I taped up with Duck tape (although there was some slight leakage when sloshing the solution around), for the  remaining main fuel filler hole, I replaced the main filler tube and then plugged this with an upturned aerosol canister (WD40 was the perfect job!)

Question 2

Do you have to remove the fuel cocks and filters from the tank before using the de-rusting concentrate or the rust inhibitor?

Accepted Answer

I removed the fuel tap and filter from my motorbike tank. The mixture of both the deruster and sealer is low viscosity but any rust or dirt is sure to clog the filter and possibly the tap.

Question 3

is rostio ethanol resistant

Accepted Answer

Not for me it wasn't, pealed off within weeks. Others say it's fantastic!

Question 4

How long can you leave the tank empty after treatment?

Accepted Answer

I can only answer based upon my experience.  I left the tank empty for a few weeks whilst I got it ready to be painted.  The caveat I have now with Rostio is that it didn't seal my tank very well.  The rust was so bad a few pin holes had developed in it.  You couldn't see them, so I painted the tank, and fitted it a couple of weeks later. About 5 days later, 3 or 4 1 to 2 inch bubbles had occurred under my shiny new paint :-(  I had to strip it all again, and then re-seal the inside of the tank with POR-15 - which sorted the pin holes out.  Tank repainted and no bubbles.  With my next tank, I will use Rostio again to clean, but will then use the POR-15 to seal.

ASIN	B019U5T9K2
Best Sellers Rank	65,650 in Automotive ( See Top 100 in Automotive ) 221 in Rust Converters & Rust Removers
Brand	Rostio
Customer Reviews	4.5 4.5 out of 5 stars (3,089)
Date First Available	17 Jan. 2016
Item Weight	2 kg
Item model number	R2109-1
Manufacturer	Rostio
Manufacturer part number	R2109-1

Rostio Tank rust remover 1 Liter plus Tank-protection Emulsion Tank Sealing Set, Tank Rust Removal

Description

Specifications

Common Questions