Would applying two layers of tint film increase TSER?

I've been wondering if applying two layers of tint film would help in TSER.

I do know that tint film reflects some heat, absorbs some heat, and scatters/diffuses the rest. Applying two layers of tint film will also compromise optical clarity. It also would possibly increase the surface temperature of the glass it is applied to, from increased absorption and insulating properties.

My question, and for examples's sake, would an initial application of Suntek InfinityOP 50 (INF50) backed with an application of Solargard UltraPerformance 75 block more heat in terms of TSER than a single application of Suntek InfinityOP 38 (INF38), or the like?

Suntek INF50 is VLT: 50 TSER: 40%
Solargard UltraPerformance 75 is VLT: 76% TSER: 40%
Suntek INF38 VLT: 38 TSER: 52%

I know TSER is not a definate value and more of a general specification of many factors combined, so it is safe to say that an application of INF50 with a TSER or 40 and UltraPerformance 75 with a TSER of 40% does not equal a TSER or 80%, correct?

My curiosity lies in the actual TSER of two of such films applied to a surface.. and if it does block more "heat" if one would accept the drawback of decreased optical clarity and any other factors associated with 2 layers of tint.

Has anyone tried this? I think I recall seeing someone post a picture of a Nissan Maxima that went through many tint jobs, like "Black Onyx" and it's current tint job had two layers of tint with like Global Fusion and something else.. I can't seem to find it again.

Thanks in advance!
Dan

I know that the films I have worked with will void any and all warranty if more than one film is applied. I don't see any reason to apply more than one film. With films that will give you an 80% TSER with just one film then it would not make sense to go with a double film.....

I would say the combo you are speaking of would have a high absorption rate.

The second layer is going to reject significantly less amount of heat than it's published TSER because most of what it can reject has already been rejected by the first layer.

So 40% + 40% isn't going to equal 80%. It should be higher, but not that much higher.

If it were that easy don't you think the Infinity 38 would already reject 80% because they could just build it with two layers in it! All you're doing compared to what they're doing is adding a layer of SR coating and PS adhesive between the film.