Scotch Rubber Mastic Tape 2228 Data Sheet March 2020 Scotch Rubber Mastic Tape 2228 is a conformable selffusing rubber electrical Product Description insulating and sealing tape. Scotch Rubber Mastic Tape 2228 consists of an ethylene propylene rubber (EPR) backing coated with an aggressive, temperaturestable mastic adhesive. The tape is made 65 mils (1,65 mm) thick for quick application buildup. It is designed for electrical insulating and moisture sealing applications. Scotch Rubber Mastic Tape 2228 is a UL recognized component for applications up to 130C. It offers excellent resistance to moisture and ultraviolet exposure and is intended for both indoor and weather exposed outdoor applications. Agency Approvals UL recognized component listing not to exceed 130C (266F), Product Category & Self Certifications OANZ2, and 3M File No. E17385 For RoHS information, please visit www.3M.com/ROHS Product Features Conformable for application over irregular surfaces. Compatible with solid dielectric cable insulations. Selffusing tape. Flexible over wide temperature range. Excellent weather and moisture resistance. Excellent adhesion and sealing characteristics with copper, aluminum and power cable jacket materials. Thick construction allows quick application buildup and padding over irregular connections. Applications Primary electrical insulation for cable and wire connections rated up to 1000 volts. Electrical insulation and vibration padding for motor leads rated up to 1000 volts. Primary electrical insulation for bus bar connections rated up to 35kV (3M drawing 2047B106) Padding for irregular shaped bus bar bolted connections. Moisture seal for cable and wire connections. Moisture seal for service drops. Moisture seal for ground wire and rod connections Jacket seal on power cable applications 1 of 3 Scotch Rubber Mastic Tape 2228 Installation Scotch Rubber Mastic Tape 2228 should be applied in halflapped layers until desired insulation build up is reached. Stretch the tape to 3/4 of its original width during application for good conformability and to obtain a moisture tight seal. Scotch Rubber Mastic Tape 2228 should be overwrapped for mechanical protection with two halflapped layers of Scotch Super 33+ Vinyl Electrical Tape. Typical Properties Properties Typical Value 6 Temperature Rating 266F (130C) Color Black 1 Thickness 65 mil (1,65mm) Steel 15.0lb/in (26,2N/10mm) 5 Adhesion PE 10.0lb/in (17,5N/10mm) 4 Fusion Pass (Type I) 1 2 Tensile Strength 150psi (1,03N/mm ) 1 Elongation 1000% 1 Dielectric Breakdown (Wet or Dry) 500V/mil (19,7kV/mm) 1 Dielectric Constant 3.5 1 Dissipation Factor 1.0% 3 Water Absorption 0.15% 2 2 Water Vapor Transmission Rate 0.1g/100in /24hr 2 Ozone Resistance Pass 4 Heat Resistance Pass, 130C 4 UV Resistance Pass Note: These are typical values and should not be used for specification purposes. * Foot notes: 1. ASTM-D-4325 Test method 2. ASTM-D-3833 Test method 3. ASTM-570 Test method 4. ASTM-D-4388 Test method 5. ASTM-D-1000 Test method 6. UL recognized component, Product Category OANZ2, and 3M File No. E17385 3M Water Seal Samples were constructed using Scotch Rubber Mastic Tape 2228 as a seal Test between PVC cable jackets and connecting ground wires (3M Cable Grounding Kit 2252). The specimens were thermal cycled in water baths at 25C and 90C. The total test time of 336 hours revealed no significant change in insulation resistance. The results meet requirements listed in UL 486D Standard for Insulated Wire Connectors for Use With Underground Connectors for insulation resistance (6.0 megohms, section 7.1) and dielectric voltage withstand (2.2kV, 1 minute, section 8.1). 2 of 3