25% VLT IF it is safe for dual-pane glazing however, 25% will increase the reflective look when looking at the glass from the street.
Story: I had a girlfriend that wanted to have sex next to a large window facing a major highway in a local office complex that had me come over to give an estimate to remove and replace. It was tinted with a 20% VLT, high reflective tint (mirrored) and there was a Mc D's across the street. I says, No F'in' way; we'd have to be a bit further back from the glass and even then someone with a keen eye could spot something amiss on the inside of that glass since the sun was hitting that side of the building. Different if it was a shaded side.
A dual-reflective, 30-35% visible light transmitted, would provide sufficient daytime privacy and lessen the threat of glass breakage and or dual pane seal failure. Limo dark would definitely cause problems relating to thermal shock and seal failure in dual pane glazing systems.
A 35% VLT dual-reflective (DR film) barely changes the appearance of a dual pane window (looking from street to home). However, it does enhance privacy (comparable to having sheer curtains). Just don't stand within a few feet (<6') of the window with your birthday suit on ... most especially when the sun shines directly on that window.
Edit: when peeling liner from film (especially film with sticky glue), use your mouth as a third hand to hold one corner and the free hand to peel the liner down. Or have someone peel and pull down. To keep the film from curling onto itself, do not peel the liner completely off; let 1-2 inches remain attached at the bottom to weight the film down.
