In terms of heat insulation, which of the following products do you think would be better when positioned at the top, bottom and meeting rails of a sash window?
The first one appears to be the only one which does not require a plastic carrier, and it is also the most expensive per metre. Though the remaining the three are bubble seals, and perhaps have more contact and perhaps better insulation (I don't know)?
Standard Weatherstrip - 2.4m Length - White (SWS)
https://www.mightonproducts.com/standard-weatherstrip-2-4m-length-white
Aquamac 5.2mm Bubble Seal White 25m Coil
https://www.mightonproducts.com/aquamac-5-2mm-bubbleseal-white-25mcoil
Sofseal Bubble Seal 50 Mtr
https://www.reddiseals.com/product/sofseal-bubble-seal/
The first one appears to be the only one which does not require a plastic carrier, and it is also the most expensive per metre. Though the remaining the three are bubble seals, and perhaps have more contact and perhaps better insulation (I don't know)?
Standard Weatherstrip - 2.4m Length - White (SWS)
https://www.mightonproducts.com/standard-weatherstrip-2-4m-length-white
Aquamac 5.2mm Bubble Seal White 25m Coil
https://www.mightonproducts.com/aquamac-5-2mm-bubbleseal-white-25mcoil
Sofseal Bubble Seal 50 Mtr
https://www.reddiseals.com/product/sofseal-bubble-seal/
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