UK Compound Rope Rubber is produced with a high quality natural rubber compound which provides excellent extrusion and workability, maximum adhesion to the tire, and outstanding wear and weather resistance. The vulcanizing temperature required: At least 100 degree Celsius (212â??F), & maximum temperature for warming 80â??C. Shore Hardness 63 +/_ 5. Material Curing time required 5 minutes per millimeter formulated as follow: (Thickness (mm) x 5) / 60 Use the extruder for quicklling when repairing or retreading tyres.