Mon-Thu 8am-6pm, Fri 8am-5:30pm
New user? Create an account
FREE Expert Advice call 0800 542 44 28
Mon-Thurs 8:00am-6pm and
Friday 8:00am-5:30pm
12mm coloured vinyl bag sealing tape is a narrow PVC tape with natural rubber adhesive used to seal and colour code polythene bag necks, grip seal bags, and other flexible packaging. It is 12mm wide, 66m per roll, on a 76mm core, and is compatible with RAJA bag neck sealer machines. Available in five colours for product identification and batch coding. Natural rubber adhesive bonds immediately to polythene and remains effective from -20°C to 60°C.
A 12mm bag neck sealer tape with natural rubber adhesive for sealing polythene bag necks by machine or dispenser. Sold in packs, priced per roll. Available in blue, yellow, red, green, and white for colour coding. 57 micron total thickness, 66m rolls, rated for bags up to 30kg. Cold store compatible down to -20°C. Shelf life 9 months.
Bag neck sealer tape bonds on contact via its natural rubber adhesive, but correct bag preparation and machine setup are the difference between a seal that holds through handling and one that lifts at the neck.
Choose the tape colour corresponding to the bag contents, product line, or shift batch before loading. Changing colour mid-run on a bag neck sealer requires re-threading the tape path, adding downtime and wasting tape on the new roll. Establish a written colour coding key and post it at each packing station to avoid errors under time pressure.
Seat the roll on the machine spindle with the adhesive side facing outward through the tape path. Thread through the machine guide following the manufacturer's instructions and confirm the roll seats without lateral movement. A roll seated off-centre will produce inconsistent tape tension and uneven seals. If using a hand dispenser rather than a machine, seat the roll on a 76mm core dispenser and confirm the blade is sharp before starting.
Expel excess air from the bag before gathering the neck. A flat, compact neck produces a neater seal with less tape required and reduces stress on the adhesive at the wrap point. A twisted or bulky bag neck creates an irregular sealing surface that increases the risk of edge lifting during handling. On a machine, consistent bag neck presentation is the primary factor in consistent seal quality.
Wrap the tape around the neck with even tension and press the adhesive overlap firmly on completion. Natural rubber adhesive develops its bond quickly on contact, but pressing the overlap ensures full adhesive contact between the tape backing and the adhesive layer beneath it. An unpressed overlap is the most common point of seal failure on bag neck tape applications under handling stress.
Store rolls horizontally in original sealed packaging at 15°C to 25°C with humidity below 65%, away from direct sunlight and heat sources. Shelf life is 9 months from manufacture, which is shorter than standard packaging tape grades. Mark each case with the delivery date on receipt and rotate stock on a first-in, first-out basis. Natural rubber adhesive degrades faster than acrylic under heat and UV exposure, rolls stored incorrectly may fail before the shelf life date.
The 12mm coloured vinyl tape is the correct choice for bag neck sealing at volume with colour coding. Where a different closure method or tape type is needed, the options below cover the most common step-up and step-across requirements.
Bag neck sealer tape, also known as bag sealer tape, is a narrow adhesive PVC tape used to close and seal the neck of polythene bags, grip seal bags, and other flexible packaging. RAJA 12mm coloured vinyl bag sealing tape is a 12mm PVC tape with natural rubber adhesive, available in five colours for colour coding. It is compatible with RAJA bag neck sealer machines and can also be applied by dispenser. Rolls are 66m long on a 76mm core, rated for bags up to 30kg, and cold store compatible down to -20°C.
The primary difference is width. Bag neck sealer tape is specifically 12mm, designed to seal polythene bag necks cleanly by machine without excess overhang. Standard packaging tape is 48mm, designed for corrugated carton sealing. The two are not interchangeable. 12mm tape is incompatible with carton sealing dispensers and too narrow to bridge a carton seam. 48mm tape is incompatible with bag neck sealer machines and too wide for neat bag neck closure.
This tape is available in five colours: blue, yellow, red, green, and white. Each colour performs identically, the same natural rubber adhesive, PVC backing, and mechanical specification. Colour selection is purely for identification and coding purposes. Common coding systems use colour to indicate product type, weight band, dispatch route, shift batch, or handling instruction.
Yes. The 12mm width and 76mm core are matched to RAJA bag neck sealer machine specifications. Thread the tape through the machine path following the manufacturer's guide and confirm the roll seats without lateral play before starting a run. The tape can also be applied by hand using a 76mm core dispenser for lower-volume applications. Check your machine specification before ordering if using a non-RAJA bag neck sealer to confirm 12mm tape compatibility.
This tape is rated for bags up to 30kg. It is designed for standard polythene bag neck sealing rather than heavy load-bearing closure. For bags above 30kg or where a tamper-evident permanent seal is required, a heat sealer provides a welded closure that is more secure than a tape seal under sustained load.
Yes. Natural rubber adhesive maintains tack down to -20°C, making this tape suitable for cold store, chilled, and freezer packing environments. Acrylic adhesive tape loses initial tack on cold polythene surfaces at around 0°C and is not suitable for freezer bag sealing. If sealing takes place in the cold store itself rather than in an ambient packing area, natural rubber is the only reliable adhesive specification for polythene bag neck work.
Store rolls horizontally at 15°C to 25°C with humidity below 65%, away from direct sunlight and heat sources including bag neck sealer machines. Shelf life is 9 months from manufacture, mark incoming stock with the delivery date and rotate first-in, first-out. Natural rubber adhesive is more sensitive to heat and UV degradation than acrylic. Rolls stored in direct sunlight or near heat sources may fail before the stated shelf life date.
