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T Barbs Convex Top

The difference between plastic T barb and plastic T section
Plastic T barb is shaped like a capital T, and the vertical leg includes barbs along its length. The width of the barb is either 3mm or 4mm. Once the T barb is place it is harder to remove than a T section.
Plastic T section looks like a capital T with smooth edges and no barbs.

Knock-on trim
T barb, which is sometimes called knock-on trim, is designed to be knocked or pushed into a slot or groove along the edge of a board or panel. Some people use T barb without glue and then knock the trim into place, but T barbs can also be fixed by gluing into place. Professional advice should be taken when using glue.
Knock-on trim can be used as edging trim and for joint filling by gripping between gaps between boards and panels. T barbs can be used to hide fixings or rough and uneven edges.
Plastic barbs are often used by manufacturers of desks, office screens and partitions.
T barbs convex top can be used on straight and curved surfaces as they are available in both rigid and flexible PVC materials.
Rigid T barbs, also called rigid knock-on trims, are made from an external grade rigid PVC, which means it is UPVC and can be used outside. It is sold in lengths with the hardness of a ruler.
Flexible T barbs, also called flexible knock-on trims, are made from ‘rubberised’ plastic which are sold in coils. The flexible trim will curve around radiused edges as this material is a softer plastic, so it is much easier to bend than the rigid material.

T barbs convex top
If a T barb has a convex top it means that the horizontal top edge of the capital T is slightly rounded. This slightly domed T barb profile gives a professional finish to your project.


We also offer a selection of flat top T barbs. The flat top means that the horizontal top edge of the capital T is flat and not rounded.
T barbs convex top or T barbs flat top - not sure which is best? Get in touch for free samples and we will put some plastic barbs in the post for you.