A clean surface is necessary but not sufficient
Preparation standards, profile, dust, contamination and timing all affect the substrate presented to the primer.
Compatibility is verified, not assumed
The primer must be recognised within the approved intumescent system. Unknown existing coatings may require investigation, testing or removal.
Interfaces should be accepted before coating begins
Clear agreement on substrate and primer suitability gives the coating team a dependable starting point for the specified fire-protection system.
Project note
Final product selection, thickness and acceptance criteria must follow the approved tested system, responsible design and project specification. This article is contractor guidance, not a substitute for project fire engineering.
Relevant local planning
Put this guidance into a local project context.
These planning guides help organise site, access, and programme information for suitable mobile work packages. They do not imply a permanent local office.