Catnic Thincoat Drywall Stop Bead in 3mm, sold in a box of 50. Designed for thin coat plasterboard edge protection at openings and abutments. Light, rigid steel construction with a scalloped edge for a clean, chip-resistant finish.
Size
Price
QTY
2.4m - 3mm
£79.50£95.40
3.0m - 3mm
£104.90£125.88
The Catnic Thincoat Drywall Stop Bead is a 3mm plastering stop bead designed to protect and define edges where a plastered area meets an opening or another wall finish. If you’ve ever had a plaster edge chip away six months after handover, you’ll know exactly why a decent stop bead matters. This one does the job cleanly and reliably.
Made from precision-engineered steel, it’s light enough to handle quickly on site without being flimsy. The scalloped wing provides good mechanical key for the plaster coat to bite into, which means the finish bonds properly rather than peeling back from the edge over time. It’s a simple product, but the engineering detail is what separates a bead that holds from one that causes callbacks.
Where Catnic Stop Bead Fits Into the Job
These beads are used wherever a thin coat plaster or board finish needs a clean termination. That includes window and door reveals, partition wall returns, and any point where a plastered surface meets a different material, whether that’s brick, timber, aluminium framing, or a tiled surface. They give the plasterer a straight, defined edge to work to and protect it once the finish coat has gone on.
Fixing is quick. Nail through the face or dab with plaster, get it plumb or level, and skim up to it. The bead sits flush and stays there. These are available in 2.4m and 3.0m lengths, sold in a box of 50, so it’s a sensible buy if you’re running multiple rooms or fitting out a full development.
Catnic’s steel bead range is a trade standard for good reason. The plastering stop bead format hasn’t changed much over the years because it works. This 3mm version suits standard thincoat plasterboard applications where a minimal build-up thickness is needed at the edge detail.
Pro Tip: When fixing stop bead to a reveal, run a taut string line or use a long level across multiple beads before the plaster sets, because even a slight bow in one bead will show up in the finished reveal line and there's no fixing it once the coat is on.
Catnic Thincoat Drywall Stop Bead is used by plasterers and drylining fixers wherever a plasterboard or thin coat finish needs a defined, protected edge. Common locations include window and door reveals, partition returns, and junctions between plastered surfaces and other finishes such as tiles, timber skirtings, or brick openings. It's equally at home on domestic new builds, refurbishment projects, and commercial fit-outs where a clean consistent finish is expected throughout.
Best For
Thincoat plasterboard edge protection
Window and door reveal terminations
Abutments to timber, tile, brick and aluminium finishes
Partition wall returns
Domestic new build and commercial fit-out
Compatible With
Thincoat plaster systems
Standard plasterboard
Nail fixing to timber and metal framing
Plaster dab fixing method
Key Specifications
3mm stop bead profile
Available in 2.4m and 3.0m lengths
Precision-engineered steel construction
Scalloped wing for mechanical plaster key
Box quantity: 50 lengths
Not suitable for: Not suitable for external use or exposed wet environments where ungalvanised steel would be at risk of rust. This is a thincoat stop bead and is not designed for thicker render or tyrolean-type coatings.
Fix the bead to the substrate using either masonry nails through the perforated face or a series of plaster dabs behind the wing. Check for plumb or level as you go, and ensure the nose of the bead sits proud of the board face by no more than the plaster coat thickness you're applying. Skim up to the bead nose in the normal way.
Keep fixings close enough together that the bead doesn't bow between them. On longer runs particularly on 3.0m lengths, fix at no more than 300mm centres to keep the bead perfectly straight. Any deviation in the bead will transfer directly into the finished edge, and that's not a conversation anyone wants to have with the site manager.
Measure and cut bead lengths to suit the opening or reveal using tin snips or an angle grinder with a cutting disc
Offer the bead into position and check for plumb or level before committing any fixings
Fix using masonry nails through the face perforations or apply plaster dabs behind the wing at regular intervals
Space fixings at no more than 300mm centres to prevent bowing on longer lengths
Confirm the bead nose is sitting at the correct height to suit your plaster coat depth
Apply and rule off the plaster coat to the nose of the bead, feathering back as normal
Allow the coat to set before checking the edge for straightness and any movement
What is the difference between a stop bead and an angle bead?
An angle bead is used on external or internal corners to protect and define the arris where two plastered surfaces meet. A stop bead is used to terminate a plaster finish at an edge or opening where it meets a different material or simply ends. This Catnic product is a stop bead, designed for reveals, abutments, and edge terminations rather than corners.
Can these be fixed with a nail gun or do they need to be hand-nailed?
Both methods work. A nail gun speeds things up considerably on larger jobs, and most plasterers use a standard first fix nail gun with 25–30mm galvanised nails through the perforations. Hand nailing is fine too, particularly on smaller jobs or awkward reveals where a gun is harder to position accurately.
Are the 2.4m and 3.0m lengths priced the same per box?
Both sizes are available in a box of 50 at the same price point. The 3.0m length gives you more coverage per bead, which can be useful on taller partition runs or floor-to-ceiling reveals to avoid unnecessary joints in the bead line.
The Catnic Thincoat Drywall Stop Bead is manufactured from precision-engineered steel with a scalloped or perforated wing to provide mechanical key for the plaster coat. The 3mm profile suits standard thincoat plasterboard applications where minimal build-up at the edge detail is required. The bead construction gives sufficient rigidity to maintain a straight edge line after fixing while remaining light enough for fast handling and cutting on site.
Brand
Catnic
Bead Type
Thincoat Drywall Stop Bead
Profile Size
3mm
Available Lengths
2.4m, 3.0m
Material
Steel
Box Quantity
50
Fixing Method
Nail or plaster dab
Wing Type
Scalloped for plaster key
Weight
N/A
Size
2.4m – 3mm, 3.0m – 3mm
Box Quantity
50
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