Nail sealable multilayered film

1. A multilayer film, comprising:

a first inert layer;

a first tie layer;

a nail sealable layer;

a second tie layer; and

a second inert layer;

wherein the nail sealable layer is between the first tie layer and the second tie layer;

wherein the first tie layer is between the first inert layer and the nail sealable layer;

wherein the second tie layer is between the second inert layer and the nail sealable layer; and

wherein the total film thickness is between 0.002 inch and 0.010 inch and wherein the film has a Water Vapor Transmission Rate of less than 0.5 grams per one hundred square inches per day.

2. The film of claim 1 , wherein the total film thickness is between 0.003 inch and 0.006 inch.

3. The film of claim 2 , wherein the total film thickness is greater than 0.004 inch.

4. The film of claim 1 , wherein the nail sealable layer comprises a polypropylene impact modified copolymer.

5. The film of claim 1 , wherein the nail sealable layer comprises a thermoplastic elastomer.

6. The film of claim 1 , wherein the film has a Dart Drop value of greater than 1000.

7. The film of claim 3 , wherein the film has a Dart Drop value of 1015 or greater.

8. The film of claim 1 , wherein the film has a Slow Puncture trait of 0.009 joule or greater.

9. The film of claim 1 , wherein the film has a Water Vapor Transmission Rate of 0.39 grams per one hundred square inches per day.

10. The film of claim 1 , wherein the first tie layer and the second tie layer are the same material.

11. The film of claim 10 , wherein the first tie layer and the second tie layer comprise a polypropylene impact modified copolymer and a thermoplastic polyolefin.

12. The film of claim 1 , wherein the first inert layer and the second inert layer are the same material.

13. The film of claim 12 , wherein the first inert layer and the second inert layer comprise a low-density polyethylene and an ethylene vinyl acetate copolymer resin.

14. The film of claim 1 ,

wherein the first tie layer and the second tie layer comprise a polypropylene impact modified copolymer and a thermoplastic polyolefin; and

wherein the first inert layer and the second inert layer comprise a low density polyethylene and an ethylene vinyl acetate copolymer resin.

15. The film of claim 1 , wherein the film is formed by a cast extrusion process.

16. The film of claim 1 , wherein the first inert layer and the second inert layer comprise between about 20% to about 30% of the weight of the film, the first tie layer and the second tie layer comprise between about 40% to about 50% of the weight of the film, and the nail sealable layer comprises between about 25% to about 35% of the weight of the film.

17. The film of claim 14 , wherein the first inert layer and the second inert layer comprise 25% of the weight of the film, the first tie layer and the second tie layer comprise between about 45% of the weight of the film, and the nail sealable layer comprises between about 30% of the weight of the film.

18. A process for forming a multilayer film, comprising:

providing a first extruder for extruding a first material;

providing a second extruder for extruding a second material;

providing a third extruder for extruding a third material;

providing a die fluidly coupled to the first extruder, the second extruder, and the third extruder; and

simultaneously co-extruding the first material, the second material, and the third material through the die to form a multilayer film, wherein the multilayer film comprises:

a first inert layer of the first material;

a first tie layer of the second material;

a nail sealable layer of the third material;

a second tie layer of the second material; and

a second inert layer of the first material;

wherein the nail sealable layer is between the first tie layer and the second tie layer;

wherein the first tie layer is between the first inert layer and the nail sealable layer;

wherein the second tie layer is between the second inert layer and the nail sealable layer; and

wherein the total film thickness is between 0.002 inch and 0.010 inch and wherein the film has a Water Vapor Transmission Rate of less than 0.5 grams per one hundred square inches per day.

19. The process of claim 18 , wherein the total film thickness is greater than 0.004 inch.

20. The process of claim 18 , wherein the first material comprises a low-density polyethylene and an ethylene vinyl acetate copolymer resin; and

wherein the second material comprises a polypropylene impact modified copolymer and a thermoplastic polyolefin.