PhoneStar Sealing Tape is a high-tack kraft paper tape designed for sealing cut and exposed edges on PhoneStar DBx and SBx acoustic boards.
PhoneStar boards contain a dense silica-sand core enclosed by a cardboard facing. When a board is cut, the exposed edge must be sealed to prevent the core material from escaping during handling, installation and the service life of the completed soundproofing system.
The 50mm-wide tape wraps around the cut edge and bonds to the cardboard faces on both sides of the board. This creates a durable closure that helps retain the sand filling and preserve the mass of the acoustic panel.
The tape is intended for use with compatible PhoneStar board products, including:
It is primarily used after a board has been cut to fit around walls, floors, ceilings, corners, door openings or other building details.
The acoustic performance of a PhoneStar board depends partly on its dense, sand-filled construction.
An unsealed cut edge can allow the silica-sand core to escape. This may:
Sealing the exposed edge immediately after cutting helps contain the filling and maintain the board in its intended condition.
The tape uses a strong adhesive backing developed to bond to the cardboard-facing material used on PhoneStar boards.
When applied to a clean and dry surface, the adhesive helps:
The adhesive bond depends on correct surface preparation. Dust, loose cardboard fibres, silica sand and moisture should be removed before the tape is applied.
The 50mm width allows the tape to cover the exposed board edge while extending onto both cardboard faces.
For a centred application, the tape should be folded evenly over the edge so that approximately half of its width bonds to each face of the board.
This wrap-around arrangement provides a more secure closure than applying a narrow strip only to the exposed end.
The kraft paper backing is compatible with the paper and cardboard construction of the PhoneStar board faces.
Its flexible construction allows the tape to:
The tape is an edge-sealing accessory and is not intended to provide a decorative exposed finish.
Each roll contains 50 metres of sealing tape, providing enough material for numerous board cuts during a soundproofing installation.
The precise number of boards covered depends on:
A 50-metre roll can seal more than 50 individual cut edges where each edge is shorter than approximately one metre. It should not be assumed to seal the complete perimeter of more than 50 boards.
The tape can be installed using common hand tools and does not require specialist application equipment.
The normal process is to:
PhoneStar Sealing Tape does not have a standalone sound-reduction rating.
Its role is to maintain the physical condition of the cut acoustic board by retaining the silica-sand filling.
The sound insulation achieved by the completed installation depends on the complete construction, including:
The tape seals exposed board edges to contain the internal filling. It does not replace the acoustic sealant or joint treatment required around the perimeter of the complete wall, floor or ceiling system.
Where the installation instructions require acoustic sealant at junctions, gaps or service penetrations, that sealant must still be applied separately.
| Product Name | PhoneStar Sealing Tape |
| Product Type | Acoustic-board edge-sealing tape |
| Roll Length | 50m |
| Tape Width | 50mm |
| Backing Material | Kraft paper |
| Colour | Kraft brown |
| Adhesive | High-tack pressure-sensitive adhesive |
| Primary Application | Sealing cut and exposed edges of compatible PhoneStar acoustic boards |
| Compatible Board Ranges | PhoneStar DBx and SBx |
| Compatible Surface | Clean, dry cardboard-faced acoustic boards |
| Core Material Retained | Silica-sand filling within the PhoneStar board |
| Application Method | Wrap around the exposed edge and press firmly onto both board faces |
| Specialist Tools Required? | No; the tape can be cut and applied using suitable standard hand tools |
| Unit of Sale | One 50-metre roll |
| Standalone Acoustic Rating? | No |
| Structural Fixing? | No |
| Acoustic Sealant Replacement? | No |
| Roll Length | Width | Material | Total Variations |
|---|---|---|---|
| 50m | 50mm | Kraft Paper | 1 |
The roll provides 50 linear metres of tape.
| Average Cut-Edge Length | Approximate Number of Edges |
|---|---|
| 0.8m | Up to approximately 62 edges before waste and overlaps |
| 0.96m | Up to approximately 52 edges before waste and overlaps |
| 1.2m | Up to approximately 41 edges before waste and overlaps |
Actual coverage will be lower where tape sections overlap, several edges are sealed on each board or material is lost during cutting and handling.
For a durable bond, the cardboard board faces should be:
Apply PhoneStar Sealing Tape immediately after cutting a compatible PhoneStar DBx or SBx acoustic board and before the board is moved extensively or installed.
Prompt sealing reduces the opportunity for the silica-sand filling to escape from the exposed edge.
Measure the installation area and mark the PhoneStar board carefully.
Before cutting, confirm:
Place the board on a stable, supported work surface.
Use appropriate personal protective equipment and follow the board manufacturer’s cutting and safety guidance.
Keep the tape close to the cutting area so the exposed edge can be sealed without unnecessary board movement.
Cut the board using the method recommended for the particular PhoneStar product.
Support both sides of the cut to avoid:
After cutting, keep the exposed edge level where practical.
Avoid turning, shaking or carrying the board before the edge has been sealed, as this may allow additional core material to escape.
Carefully remove loose silica sand and cutting dust from:
Use a suitable soft brush, clean dry cloth or controlled vacuum method.
Do not apply the tape over a loose layer of sand because the adhesive must contact the cardboard board faces.
Check that:
A badly damaged board should be assessed before attempting to repair it with sealing tape.
Measure a length of tape sufficient to cover the complete exposed edge.
Allow a small additional length where an overlap or folded end is required.
Cut the tape cleanly using suitable scissors or a sharp knife on a protected cutting surface.
Position the 50mm-wide tape centrally over the exposed edge.
Align it so that a similar width will fold onto each face of the board.
Avoid placing the full width on only one face, as this will leave the opposite side of the cut insufficiently secured.
Press one side of the tape firmly onto the first cardboard face.
Work progressively along the edge to prevent:
Fold the tape tightly around the exposed board edge.
Apply firm pressure along the fold so the kraft backing follows the board profile and closes over the silica-sand core.
Press the remaining tape width onto the opposite cardboard face.
Smooth it firmly from the centre towards the outer edge.
Check that the adhesive makes continuous contact with both faces and that no loose sand is trapped beneath the bonded sections.
Where more than one tape length is needed, overlap the ends sufficiently to maintain a continuous closure.
Do not leave gaps between adjacent tape sections.
Inspect the complete taped area and confirm that:
Apply an additional short section of tape where:
Do not build up excessive layers that prevent the board from fitting correctly within the specified construction.
Once the tape is firmly bonded, handle and install the board in accordance with the PhoneStar system instructions.
Take care not to scrape the taped edge against the floor, framing or adjacent boards.
Apply the separately specified fixings, joint treatment and perimeter acoustic sealant.
The sealing tape contains the board core but does not replace the other components required for the acoustic wall, floor or ceiling system.
Before the board is concealed by another layer, check that:
PhoneStar Sealing Tape does not independently provide sound insulation.
It helps maintain the condition and core density of cut PhoneStar boards. The acoustic performance of the completed installation depends on the entire tested or designed construction.
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