Platelet count. high platelet level (thrombocytosis) more than 450,000. normal platelet level. 150,000–450,000. low platelet level (thrombocytopenia) less than 150,000. However, some studies. and is temperature resistant between -60°F to 300°F. Permatex 64040 High Temperature Sleeve Retainer, 36 ml. Permatex® High Temperature Thread Sealant With PTFE. Cure speed vs. temperature The rate of cure will depend on the ambient temperature. tube, carded Cure speed vs. activator Where cure speed is unacceptably long, or large gaps are present, applying an activator.