Anti-Corrosion Coatings

Developed from one of our construction coatings, this solvent free hybrid coating can be a one coat or a two coat system.

Moisture and surface tolerant, the coating cures without application of external heat so can be used on site. What do we mean by surface tolerant? It will bond to rusty steel so long as all loose rust debris has been removed – St3 is the designated standard.

If a base coat is needed, for example in a highly exposed situation, then the Blocksil base coat we would recommend is based on similar solvent free hybrid coating chemistry as the main coat.

Both coatings can be applied from near 0⁰C to 60⁰C (140°F), thereby giving the applicator a very wide application window. Application of the coatings is by spray, brush or roller. And the steel surface to be coated can be damp as the coatings are moisture tolerant.

The main coat, the top coat where the base coat is used, is available in a number of colours. It takes a number of hours to fully cure but it won’t allow rain through pretty much as soon as it is applied. For more detailed and application specific instructions, please contact Blocksil for advice.

With a typical dry film coating thickness of 200 microns (just under 8 thou / Mil), the top coat on its own will give 5,000 hours of QUV testing. A typical uPVC as a comparison may achieve 500 hours and epoxy paint some 250 to 300 hours.

The QUV accelerated weathering tester simulates outdoor weathering by exposing the coating or item under test to alternating cycles of UV light and moisture at controlled, elevated temperatures.

The testing of high moisture levels on paints or coatings is important as penetrating moisture may cause damage such as blistering. So having a realistic acceleration of outdoor moisture attack as part of the testing is essential.