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Build: 1.2.37 - Fri, 26 Jun 2026 01:32:50 GMT

Porter's

Liquid Iron Instant Rust Sealer

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Porter's

Liquid Iron Instant Rust Sealer

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About Porter's Liquid Iron Instant Rust Sealer

Porter’s Instant Rust Clear Sealer is designed for use when protection, sealing or isolation is required on interior or exterior surfaces that have been finished with Porter’s Liquid Iron & Instant Rust. Porter’s Liquid Iron & Instant Rust is an authentic rusted finish and on exterior surfaces this finish will continue to rust after initial application so be mindful that rust stains (caused by run-off) may appear on adjacent surfaces. To prevent these stains we recommend finishing with Porter’s Instant Rust Clear Sealer. However, if isolation is not required, Porter’s Liquid Iron & Instant Rust should be left to weather and age.

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Key Points
  • Matt polyurethane finish
  • Non-yellowing
  • Water and stain resistant
  • Quick drying
  • Water wash up
  • Isolates rust run-off from surfaces painted with Porter's Liquid Iron & Instant Rust
  • Apply by brush or spray
Quick guide
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Touch Dry

30 minutes

Cleaning materials

Water

Application Tools

Airless Spray, Brush

Product specification
Precautions and limitations

Please note that once Instant Rust Clear Sealer has been applied, no further oxidisation will occur to the Liquid Iron & Instant Rust.

Not suitable for use other than that intended. For example, this product is not suitable as a clear sealer for Porter’s Liquid Copper and Patina Green.

If applying more than 2-3 coats, a low sheen appearance will result.

Do not apply in high humidity, below 10°c or above 30°c.

It is recommended recoating be carried out every 12 months.

Surface preparation
Previously painted surface

PREPARATION:
Apply Porter’s Liquid Iron and Instant Rust according to specification. When the desired level of rust/oxidisation has occurred, rinse surface with clean water to remove any Instant Rust residue and allow to dry completely. Allow a minimum of 48 hours drying and curing/hardening time prior to the application of Porter’s Rust Sealer.
If Liquid Iron surface is not rinsed and thoroughly dried as directed, Instant Rust Clear Sealer may dry with a milky appearance.
COMPLEMENTARY PRODUCTS:
Porter’s Instant Rust Clear Sealer has been designed for use over Porter’s Liquid Iron & Instant Rust only.

How to apply
Brush, Roller

Do not apply paint if Relative Humidity is above 85% or temperature is within 3°C of Dew Point.
Do not apply if the surface temperature is greater than 30°C or below 10°C, or likely to fall below 10°C during the application or drying period.
Stir thoroughly prior to use. Apply two coats by brush or spray, ensuring even distribution.
Touch dry in 30 minutes. Allow minimum 2 hours dry time between coats. If applying more than 2-3 coats, a low sheen appearance will result.
Do not apply coats too thick – two thin to moderate coats is sufficient. Applying thick coats may cause the finish to dry with a milky appearance. It is important that good coverage is achieved and there are no areas where the product is not completely applied.
It is recommended recoating be carried out every 12 months.

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