3M Glass Cloth Electrical Tape 27 is a 7-mil woven insulating glass cloth tape with pressure-sensitive rubber thermosetting adhesive. This tape is designed to operate in 600-volt dry applications requiring high mechanical strength and resistance to high temperatures. The glass cloth is specially treated and prepared to provide corrosion-freeprotection. The glass cloth will not shrink, rot or burn, has a high tensile strength and is printable.
APPLICATIONS:
- Insulating electric and induction-type furnace power supply leads
- Securing systems requiring high mechanical strength and resistance to high temperatures
- Splicing wire SF and SFF rated 302° F (150° C), 356° F (180° C)
- Insulating motor lead connectors, switchers and controls for furnaces and ovens
- Insulation in coil wrapping outerwrap
- Provides heat stable insulation for hot spot applications
Physical:
| Property (Test Method) (ASTM D1000 unless noted) | Typical Value US units (metric) |
| Color | white |
| Adhesive | rubber thermosetting |
| Backing Thickness | 5.0 mils (0,125 mm) |
| Total Thickness | 7.0 mils (0,177 mm) |
| Elongation (% at break) | 5% |
| Operating Temperature | 150° C |
| Adhesion to Steel | 30 oz/in (3.3 N/10 mm) |
Electrical:
| Property (Test Method) (ASTM D1000 unless noted) | Typical Value US units (metric) |
| Dielectric Breakdown | 3000 V |
| Breaking Strength | 150 lbs/in (252 N/10 mm)` |
| Insulation Resistance | 4.8 x 104 megohms |
| CTI Material Group | 1 |
| Electrolytic Corrosion Factor 3M Test Method | 0.9 |