JLar II
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Description
[Pro Tapes, a division of Shurtape Technologies] A series of a clear pressure sensitive tapes with a Polypropylene carrier and a methacrylate adhesive. Pro JLar II Gel Repair Tape is specifically designed for clarity and strength.
Products available include:
- Pro JLAR II Gel Repair: an optically clear polypropylene film tape Technical and Safety Sheet
- Pro Clear Book Repair: a general purpose polypropylene book repair tape Technical and Safety Sheet
- Shurtape J-Lar Library: a clear to the core tape that tears by hand (2.6 mils thick) Technical and Safety Sheet
- Shurtape J-Lar Gel Repair: a clear to the core polypropylene tape (2.6 mils thick) Technical and Safety Sheet
Synonyms and Related Terms
J-Lar; J-LAR; JLAR; CLR172; Clear to the Core tape; Permacel J-Lar
Alternative: 3M 850
Applications
- Seal exterior of glass connections
- Package and carton sealing
- Overlays, laminating and label protection
- Splicing and repairing lighting gels and scrollers
Personal Risk
Pro tape link: JLar Technical and Safety Sheets
Physical and Chemical Properties
Properties below are for Pro JLAR II Gel Repair
- Backing: Crystal clear, biaxially oriented polypropylene film (BOPP)
- Adhesive: Crystal clear, solvent-based acrylic adhesive
- Optically clear; will not yellow
- Maintains performance and appearance when exposed to UV light
- Solvent and abrasion resistant
- Adhesion to Stainless Steel = 30 oz/in width
- Application Temperature Range = 20 F to 110 F
- Elongation = 140%
- Tensile Strength = 40 lbs/in
- Thickness = 3.5 mils
Handling Properties
Tape should be stored in its original packaging in a cool, dry area away from direct sunlight and should be used within 12 months of date of shipment. Surfaces to which tape is applied should be clean, dry and free of grease, oil or other contaminants.
Resources and Citations
- Pro Tapes: JLAR II (July 2025)
- Rachael Perkins Arenstein, Lisa Goldberg, and Eugenie Milroy, ‘Support and Rehousing for Collection Storage’ In ‘Preventive Conservation: Collection Storage’ Lisa Elkin and Christopher A. Norris (eds.), Society for the Preservation of Natural History Collections, New York. 2019.
- Pam Hatchfield, Pollutants in the Museum Environment, Archetype Press, London, 2002