TEFROKA® EP/PU Sealer

Common issues

• Adhesion loss at the sealant-to-substrate interface, especially on poorly prepared or oil-contaminated steel/aluminium
• Skinning-over or incomplete cure in low-temperature or high-humidity application conditions
• Cracking or splitting at expansion/movement joints subjected to more movement than the product's rated elongation
• UV-related chalking and hardening on weather-exposed applications
• Softening or staining where an incompatible topcoat has been applied over the sealant
• Premature joint failure where backing rod or bond-breaker tape was omitted, causing three-sided adhesion
• Blistering from moisture trapped beneath the sealant on damp substrates

Inspection checklist

• Visual check for cracking, splitting or debonding along seam and joint lines
• Confirm the sealant still accommodates joint movement without visible tearing at corners
• Spot pick-test adhesion at a few representative locations
• Check for active water ingress behind sealed joints (deckhouse penetrations, tank tops)
• Verify compatibility of any overcoat applied since original installation
• Check for chalking, discolouration or hardening indicating UV/weathering degradation
• Review DNV MED certificate (MEDB0000AXV) validity and batch traceability of material carried on board

Service intervals

Typical wear limits

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

• Same-system primer/tie-coat as originally applied - do not substitute an incompatible primer
• Matching TEFROKA EP/PU sealant cartridges/kit from the same product line
• Backing rod / bond-breaker tape sized to the joint gap
• Compatible surface preparation materials (degreaser, abrasives) for the coating system

Safety

• Solvent/isocyanate vapours during application - forced ventilation required, especially in enclosed spaces
• Skin and eye irritation from uncured resin and hardener components - PPE per SDS
• Slip hazard from uncured or partially cured sealant on walkways
• Confined space precautions when resealing tank or void penetrations

Class survey

This is a Module B+D certified interior/construction material (DNV MED certificate MEDB0000AXV). Surveys check that the as-fitted material matches the approved type, that the certificate remains valid, and that fire-relevant surface materials have not been overcoated with an unapproved, non-compliant product.