Before you repaint Don’t treat the symptom. Find the cause.
When a coating fails, applying another coat may only hide the problem. Five questions to ask before recoating — and the six things UNF looks at before specifying anything.
Read ArticlePractical notes from our coating specialists on surface preparation, coating systems, application and the failures we are asked about most.
When a coating fails, applying another coat may only hide the problem. Five questions to ask before recoating — and the six things UNF looks at before specifying anything.
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Peeling, rusting, blistering, cracking, chalking, corrosion under the film, lost adhesion, pinholes, sagging, discolouration and erosion — what causes each one, how it is solved, and how it is prevented next time.
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Selecting the right coating is only part of the job. DFT, WFT, recoat interval, temperature, dew point and humidity all decide whether the specified system actually performs.
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A coating system is not simply a selection of paint products. Primer, intermediate and topcoat each do a different job — and the number of coats and the film thickness are specified, not guessed.
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A coating can only perform as well as the surface beneath it. Six things worth understanding before the first coat — from Sa 2½ and ISO 8501 to surface profile and what goes wrong when preparation is rushed.
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