Semin CE 78 Joint Filler 120’ is a powder jointing compound developed for tapered-edge plasterboard joints, used in conjunction with jointing tape. It offers an extended working time of up to 120 minutes, making it ideal for larger areas, steady-paced finishing, and reducing waste on busy sites. The compound mixes to a fine white paste, is easy to apply, and is formulated for low shrinkage with a smooth sanding finish.
Key Benefits
-
Extended working time (120 minutes) – ideal for bigger rooms and longer runs
-
Fine white finish for clean, professional joint lines
-
Easy to sand, helping achieve a smooth final surface
-
Low shrinkage for stable joints and reduced risk of read-through
-
No cracking up to 5mm thickness (for small fills / local corrections)
-
Reaction to fire: A1 (non-combustible classification)
Typical Uses
-
Jointing tapered-edge plasterboard with jointing tape
-
Filling gaps and imperfect board junctions prior to taping
-
Covering and finishing screw heads
-
Suitable for plasterboards with or without insulation backing (glass wool, rock wool, polystyrene)
Suitable Substrates
-
All standard plasterboards with tapered edges and paper face, including boards with bonded insulation backings.