Fortis Epoxy Knot Filler is designed for repairing knots, cracks and voids in timber slabs, furniture, benchtops, floorboards and recycled timber. Its fast cure allows efficient repairs, producing a smooth, clear finish that can be sanded or tinted to suit the timber.
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FORTIS Epoxy Knot Filler is a clear, two-component epoxy resin system designed for filling knots, cracks, holes, voids and other imperfections in timber.
Its low viscosity provides excellent penetration into timber imperfections, while good bubble release and self-levelling properties help produce a smooth, clear finish.
The fast-curing formulation allows efficient filling and repair of rough sawn, dressed, aged and recycled timber. Once cured, 822 Knot Filler can be sanded to produce a smooth finished surface.
Typical applications include timber slabs, furniture, floorboards, benchtops, recycled timber, joinery and decorative woodworking.
FORTIS Epoxy Knot Filler is supplied clear and can be tinted using compatible FORTIS Epoxy Resin Pigments.
Two-Component Clear Epoxy Resin
Australian Manufactured
Ensure the timber is clean, dry and free from dust, oil, wax and other contaminants. Remove loose fibres or material from knots, cracks and voids before application.
Mix FORTIS Epoxy Knot Filler at 4 parts Resin (Part A) to 1 part Hardener (Part B) by volume. Mix thoroughly until uniform.
Pour the mixed epoxy carefully into the knot, crack or void. For deeper imperfections, multiple pours may be required depending on the size of the repair and application conditions.
Allow the epoxy to cure before sanding. Under typical conditions, the product sets in approximately 2–3 hours and can be sanded after approximately 12 hours.
Temperature, mixed quantity and pour depth can affect working and cure times. Always conduct a test when using pigments or working with unfamiliar timber.
For structural timber bonding, assembly and repairs where an adhesive rather than a filling compound is required, use Fortis AD822 High Strength Epoxy Adhesive.
Timber must be clean, dry and free from dust, oil, wax, loose fibres and other contaminants. Test highly porous, oily or unfamiliar timber species before application.
1.25L, 5L
FORTIS Epoxy Knot Filler is designed to fill knots, cracks, holes and voids in timber. It is suitable for furniture, timber slabs, floorboards, benchtops, joinery and recycled timber.
Yes. It is particularly suited to aged, reclaimed and recycled timber where knots, cracks and other natural imperfections need to be filled before finishing.
FORTIS Epoxy Knot Filler typically sets in approximately 2–3 hours and can be sanded after approximately 12 hours. Temperature and application conditions will affect cure time.
Yes. FORTIS Epoxy Knot Filler is supplied clear and can be tinted using compatible FORTIS Epoxy Resin Pigments. Always conduct a small test before larger applications.
Yes. Once sufficiently cured, Epoxy Knot Filler can be sanded to produce a smooth surface ready for subsequent timber finishing.
Mix FORTIS Epoxy Knot Filler at 4 parts Resin (Part A) to 1 part Hardener (Part B) by volume.
Knot Filler SDS Part A
Knot Filler SDS Part B
