Heat Repellent / Resistant Material (For Fridge Beside Stove)

[bood 0]

My stove is just beside my refrigerator. Temperature in the fridge will start lowering during cooking and I can see the freezer compartment starts to "melt" after long hour of cooking.

There is no way for me to shift them away from one another. Hence, I thought of placing a heat repellent / resistant board (preferably with magnet to stick) on the side wall of my fridge to deflect the heat from cooking.

Is there any place in Singapore I can get such material?

Thanks in advance.