Heavy duty film Electrical long term protection. CRC  Lectra  Shield  is  an  inhibited  coating  that  forms a  transparent,  amber  film  that  dries  to  touch  in  one  or two hours. The protective coating will not become brittle, craze  or  crack  and  provides  excellent  protection  through extreme  temperature  ranges.  CRC  Lectra  Shield  will  not attack plastic, rubber, paint or insulation materials.  Lectra Shield  is  ideal  for  air  conditioning  equipment,  cable  end sealer, moulds, airport and aircraft maintenance.