EPOXY MASTIC RUST-PROOFING PAINT IN LIGHT GREY – NEW FORMULA

Rustbuster’s Armaguard Epoxy Mastic  is our award-winning Epoxy  paint, ideal for both brushing and spraying. Supplied as a two-component pack, along with thinner. The mix ratio is straightforward: 3:1 by volume, plus thinner.

Kits can be shipped with Thinners, Panel Wipe, Mixing Cups and Stirrer’s or simply the paint on it’s own

Each pack includes mixing instructions and recommended thinner quantities. Although Epoxy Mastic can serve as a primer-finisher without needing an over-coat, it can also be over-painted with single or two-pack products.

This paint is typically thick and requires proper mixing and thinning with the provided thinner. For the best results, follow the instructions carefully. Refer to the links below for additional guidance.

Rusty’s Tips: A practical guide on how to use this product

Painting galvanised steel might take a little more preparation,

Product description2 pack modified high build epoxy rust proofing paint.
Pack description

1.25ltr starter pack 1ltr can filled with 750ml Comp A, 250ml can filled with 250ml Comp B & 250ml thinner

1.25ltr starter pack Kit – As above with additional 1ltr Panel Wipe, 3 wooden stirrers and 5 mixing cups

2.25ltr chassis pack 2x 1ltr can filled with 750ml Comp A, 1x 500ml can filled with 500ml Comp B & 250ml thinner.

2.25ltr starter pack Kit – As above with additional 1ltr Panel Wipe, 3 wooden stirrers and 5 mixing cups


 

Application temperatureCan be applied to steel as low as 0c. The steel must be at least 3 degrees above the current dew point. (See our dew point calculator.)
ThinningUse only the epoxy thinner supplied, from 5 to 20% max.
Application & recoatingBrush or spray.

A second coat or topcoat can be applied any time after approx. 5 hours* with no need to abrade between coats. If recoating or topcoating once the first coat has fully cured (after approx. 7 days), lightly abrade first with P320 paper.

* At 20 degrees centigrade. Longer interval may be required in colder conditions.

SprayingMinimum 1.8mm nozzle or a HB (high build) primer set up. Test atomisation on a test panel first. Viscosity will vary, i.e. thicker in colder temperatures. Data correct at 20c.

Conventional Spray (Air) 3-4bar – 44-58psi

Airless Spray 18thou tip, 150bar – 2176psi

Pot lifePot life is the time from mixing the two components together to the point at which the mixed paint is no longer useable. For EM121, you have 2.5 hours pot life once mixed at 20c – longer at colder temperatures.
Storage and shelf lifeWe recommend storing upside down in a dry place at around 20c. In these conditions the product has a shelf life of 12 months.

Do not store below 20c as this can affect performance.

DisposalAllow any excess mixed paint to cure in your mixing cup and throw away as dry waste.
CleaningClean up with standard thinner or gun wash. Do not thin the paint with standard thinner as this will affect the paint cure.
SafetyUse in a well-ventilated atmosphere. Use a respirator face mask when spraying or brushing in an enclosed space. Please see the MSDS (material safety data sheet) in our data sheet area.

Wear suitable protective clothing, gloves and eye protection.

FAQ’sHow many coats are recommended? We would always recommend 2 coats, this will increase the coatings thickness offering better protection and removing the chance of missed areas (holidays).

Can I paint over a rusty surface? Yes, Epoxy mastic is non-porous so will 100% seal the rusty surface, we would recommend removing all loose material from the surface before painting. 

Does EPOXY MASTIC come in colours? Yes, 14 colours available from stock and custom colours available (minimum packsize 5ltr kit).

How long beofere I can overcoat? A second coat or topcoat can be applied any time after approx. 5 hours* with no need to abrade between coats. If recoating or topcoating once the first coat has fully cured (after approx. 7 days), lightly abrade first with P320 paper.

Can I paint over Epoxy mastic with a cellulose topcoat? Yes, Epoxy mastic will accept pretty much every type of topcoat, if I doubt we would recommend testing a small area and watching for any reaction before performing an adhesion test if required.