The method
Assess the edge
Density and porosity of the board decide the filler load. A coarse particleboard edge takes more material than a fine MDF edge.
Apply in one pass
Use a ready-to-use filler with body, the filler must bridge pores without slumping. Avoid systems that shrink back into the edge during drying.
Dry without shrinkage
Shrinkage is the classic edge failure: the profile looks filled, then sinks. A non-shrinking filler makes the second pass unnecessary.
Sand and finish
The filled edge must sand flush with the board and take the coating with the same gloss as the face. Adhesion of the finish to the filler is as important as adhesion of the filler to the board.
Why fills fail
Shrinkage
The fill sinks into the pores after drying, the edge looks wavy under the coating and needs a second round.
Break-out
Poor adhesion lets the fill pop out at the machining step that follows.
Coating failure
Finish that doesn't bond to the filler shows edge lines, gloss differences or peeling.
Edge filling at line speed on a PAR-Filler by Fillosys.
Common questions
How do I fill saw edges of particleboard before coating?
Apply a ready-to-use, non-shrinking wood filler across the edge in one pass, let it dry, sand flush and coat. The key property is no shrinkage: it eliminates the second filling round that porous edges normally need.
Can this be automated?
Yes, edge filling of board material is one of the core applications of the PAR-Filler machines by Fillosys, running CosmetiWood PRO at up to 117 m²/h with 1% putty waste.
Why does my filled edge still show after coating?
Almost always shrinkage or coating adhesion: the filler sank back into the pores after the visual check, or the coating didn't bond to the filler surface. Both are filler properties, not operator errors.
Get this right on your own line.
Professional wood fillers, engineered to lower the true cost of filling: fewer rejected boards, less rework, a faster line.
The method
Assess the edge
Density and porosity of the board decide the filler load. A coarse particleboard edge takes more material than a fine MDF edge.
Apply in one pass
Use a ready-to-use filler with body, the filler must bridge pores without slumping. Avoid systems that shrink back into the edge during drying.
Dry without shrinkage
Shrinkage is the classic edge failure: the profile looks filled, then sinks. A non-shrinking filler makes the second pass unnecessary.
Sand and finish
The filled edge must sand flush with the board and take the coating with the same gloss as the face. Adhesion of the finish to the filler is as important as adhesion of the filler to the board.
Why fills fail
Shrinkage
The fill sinks into the pores after drying, the edge looks wavy under the coating and needs a second round.
Break-out
Poor adhesion lets the fill pop out at the machining step that follows.
Coating failure
Finish that doesn't bond to the filler shows edge lines, gloss differences or peeling.
Edge filling at line speed on a PAR-Filler by Fillosys.
Common questions
How do I fill saw edges of particleboard before coating?
Apply a ready-to-use, non-shrinking wood filler across the edge in one pass, let it dry, sand flush and coat. The key property is no shrinkage: it eliminates the second filling round that porous edges normally need.
Can this be automated?
Yes, edge filling of board material is one of the core applications of the PAR-Filler machines by Fillosys, running CosmetiWood PRO at up to 117 m²/h with 1% putty waste.
Why does my filled edge still show after coating?
Almost always shrinkage or coating adhesion: the filler sank back into the pores after the visual check, or the coating didn't bond to the filler surface. Both are filler properties, not operator errors.
Get this right on your own line.
Professional wood fillers, engineered to lower the true cost of filling: fewer rejected boards, less rework, a faster line.