Glass Cloth Masking Tape
OPALUS PACK is a manufacturer of glass cloth masking tape for high temperature industrial masking on metal parts. It is used for powder coating masking, bake paint masking, grit blasting, thermal spray masking, and plasma spray masking where thin film tapes may tear, shrink, or leave residue. The woven fiberglass backing improves abrasion resistance, while the silicone pressure sensitive adhesive helps the tape stay in place during tested 260C cycles and remove cleanly after heating.
- Backing: woven fiberglass cloth
- Adhesive: silicone adhesive
- Color: white
- Thickness: 0.18 mm – 0.25 mm
- Heat resistance: up to 260C
- Supply: rolls, slit rolls, die-cut shapes
Product Description
Product Overview
This high temperature glass cloth tape is made for coating shops that need tougher masking than polyester tape or ordinary masking tape. On a powder coating line, parts pass through cleaning, racking, spraying, oven curing, cooling, and unloading before tape removal. If the tape lifts, breaks, or transfers adhesive onto metal, extra cleaning or coating repair is often required.
The woven fiberglass backing gives better strength against rough handling, sharp edges, blasting particles, and spray impact. For approval, test the tape on the actual metal part, not only by hand adhesion. A useful check includes a 260C bake cycle, cooling, removal, and inspection for residue, edge lifting, tape breakage, and adhesive transfer on machined surfaces, threaded holes, mounting flanges, and coating-free assembly areas. Retained approved samples help compare slit width, removal behavior, and repeat-order consistency.
Benefits
- Masks metal parts during 260C powder coating, bake paint, and selected spray processes.
- Protects coating-free zones around holes, threads, flanges, and contact faces.
- Resists tearing during removal better than many thin film masking tapes.
- Holds up against handling friction, grit blasting observation, and spray impact.
- Supports clean removal after oven exposure when tested under real process conditions.
- Can be supplied as slit rolls or die-cut shapes for repeated part geometry.
How Should Glass Cloth Masking Tape Be Applied Before Powder Coating or Bake Paint Masking?
Before application, the metal surface should be dry and free from oil, dust, blasting residue, and loose particles. Avoid touching the adhesive surface with bare hands, because skin oil can weaken the edge seal during heating. After placement, press the tape with a roller or squeegee, especially around holes, slots, threads, and machined boundaries. Do not stretch the tape too much; excess tension may pull the edge back after oven exposure. For 260C bake cycles, check clean removal, residue, edge lifting, and tape breakage before repeat production.
TDS
| Item | Typical Value |
|---|---|
| Product Type | High temperature glass cloth masking tape |
| Backing Material | Woven fiberglass cloth |
| Adhesive Type | Silicone pressure sensitive adhesive |
| Standard Color | White |
| Total Thickness | 0.18 mm – 0.25 mm, grade dependent |
| Temperature Resistance | Up to 260C for tested masking cycles |
| Peel Adhesion | 6 N/25 mm – 9 N/25 mm, test method dependent |
| Tensile Strength | >=350 N/25 mm, grade dependent |
| Standard Width | 10 mm – 1000 mm |
| Custom Slit Width | Confirm by masking line, drawing, and slit-width tolerance |
| Roll Length | 30 m, 33 m, or custom length |
| Core Size | 76 mm paper core |
| Die-Cut Format | Circles, strips, tabs, and drawing-based masking shapes |
| Approval Check | 260C bake trial, residue review, edge-lift check, removal breakage check |
| Main Process Fit | Powder coating, bake paint, grit blasting, thermal spray, plasma spray |
Applications
- Powder coating masking for grounding points, threaded holes, and coating-free assembly zones.
- Bake paint masking where the part needs a clean paint edge after oven curing.
- Temporary masking for thermal spray areas exposed to heat, overspray, and abrasive particles.
- Temporary shielding for selected metal areas during plasma spray coating.
- Grit blasting or shot blasting masking where abrasion resistance and tear strength matter.
- Industrial part masking for machined surfaces, flanges, bearing seats, and repair coating areas.
When Is Glass Cloth Masking Tape Better for Thermal Spray or Plasma Spray Masking?
Glass cloth masking tape is a better choice when the protected area must handle heat and abrasive impact at the same time. A thin film tape may survive a short oven cycle but fail during grit blasting, flame spray, plasma spray, or rough part handling. The woven backing gives stronger tear and abrasion resistance, while the silicone adhesive helps it stay bonded during high temperature exposure. It is useful on bearing zones, machined faces, threaded sections, and coating-free assembly surfaces where overspray, broken removal, or adhesive residue would slow finishing work.
FAQ
Can glass cloth masking tape be used for 260C powder coating?
Yes. Approval should be based on oven dwell time, coating thickness, metal finish, masking width, and removal timing.
Will the tape leave adhesive residue after baking?
The silicone adhesive is made for clean removal, but residue should still be checked after the real bake cycle.
Is this tape suitable for plasma spray masking?
It can be used for selected plasma spray masking and thermal spray masking. Severe HVOF or very high impact work should be tested first.
Can the tape be supplied in narrow widths or die-cut shapes?
Yes. OPALUS PACK can supply slit rolls and die-cut masking shapes according to drawings or approved samples.