Stormguard Radiator Foil - Heat Reflector Film - 4m x 47cm - Virtual Plastics Ltd.
RADIATOR COMMERCIAL GRADE REFLECTIVE FOIL HEAT REFLECTOR(16' X 2')-DOUBLE THICK 7.95mm CERTIFIED AND TESTED FOR CUSTOMER SAFETY. DOES NOT EMIT DANGEROUS TOXINS WHEN HEATED. SAVES ENERGY!!!!! : Amazon.ca: Tools & Home Improvement
MakeDoCREW - Radiator reflectors - CREW Energy
Radiator Heat Reflection Insulation Foil Save Money Energy Reflective Insulation | DIY at B&Q
Can tin foil behind your radiators cut energy bills? | This is Money