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A system for sealing or insulating a large volume is provided. The system includes an envelope having walls defining an interior. The interior is configured to receive a foaming composition. The envelope is initially configured in a retracted configuration. A foaming composition is configured for in

A system for sealing or insulating a large volume is provided. The system includes an envelope having walls defining an interior. The interior is configured to receive a foaming composition. The envelope is initially configured in a retracted configuration. A foaming composition is configured for insertion into the interior of the envelope. The envelope is configured such that the foaming composition expands the envelope such as to fill a large gap.

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1. A system for sealing or insulating a large volume, the system comprising: an envelope having walls defining an interior, the interior configured to receive a foaming composition, the envelope initially configured in a retracted configuration; anda foaming composition configured for insertion into

1. A system for sealing or insulating a large volume, the system comprising: an envelope having walls defining an interior, the interior configured to receive a foaming composition, the envelope initially configured in a retracted configuration; anda foaming composition configured for insertion into the interior of the envelope, the foaming composition comprising ceramic foam;wherein the envelope is configured such that the foaming composition expands the envelope such as to fill a large gap. 2. The system of claim 1, wherein the envelope has the shape of a roll in the retracted configuration. 3. The system of claim 2, wherein the envelope is configured such that the force of gravity also acts to unroll the envelope. 4. The system of claim 1, wherein the envelope includes a series of leak pores configured to allow the foaming composition to escape the interior of the envelope to assist in sealing the large volume. 5. The system of claim 1, wherein the foaming composition is configured to dissolve the envelope. 6. A system for sealing or insulating a pipe or ductwork, the system comprising: an envelope having an inner skin and an outer skin configured for wrapping around the pipe or ductwork, the inner skin and the outer skin defining an interior, the interior configured to receive a foaming composition, the envelope initially configured in a non-rigid structure; anda foaming composition configured for insertion into the interior of the envelope, the foaming composition comprising ceramic foam;wherein the envelope is configured such that the foaming composition expands the envelope such as to form a insulation structure around the pipe or ductwork. 7. The system of claim 6, wherein the envelope extends substantially the lengths of the pipe or ductwork. 8. The system of claim 6, wherein the inner skin and the outer skin are connected to each other by a plurality of members. 9. The system of claim 6, wherein the inner skin and the outer skin of the insulation structure are concentric about the pipe. 10. The system of claim 6, wherein the inner skin includes a series of leak pores configured to allow the foaming composition to escape the interior of the envelope to assist in sealing the pipe or ductwork. 11. The system of claim 6, wherein the foaming composition is configured to dissolve the envelope. 12. A system for sealing or insulating an insulation cavity formed between internal and external materials, the system comprising: an insulative batt positioned between the internal and external materials, the insulative batt having a first component of a foaming composition fused to a surface of the insulative batt adjacent the external material; anda fitment port configured to extend through the insulative batt and further configured to facilitate injection of a second component of the foaming composition;wherein the first component of the foaming composition is configured to react with the second component of the foaming composition such as to form a layer of foam composition that seals with the exterior material. 13. The system of claim 12, wherein the layer of foam composition is in a range of from about 0.1 inches to about 0.3 inches. 14. The system of claim 12, wherein the first component of the foaming composition is fused to a facing material. 15. The system of claim 12, wherein an air gap is formed between the layer of foam composition and the external materials. 16. The system of claim 15, wherein the air gap has a thickness in a range of from about 0.2 inches to about 0.8 inches. 17. A system for sealing or insulating an insulation cavity formed between internal and external materials, the system comprising: an insulative batt positioned between the internal and external materials, the insulative batt having a surface positioned adjacent the external material; anda fitment port configured to extend through the insulative batt and further configured to facilitate injection of a foaming composition;wherein the foaming composition is configured to form a layer of foam composition that seals the insulative batt with the exterior material. 18. The system of claim 17, wherein the layer of foam composition is in a range of from about 0.1 inches to about 0.3 inches. 19. The system of claim 17, wherein the insulative batt includes a facing material, and wherein the foaming composition is configured to form a layer of foam composition that seals the insulative batt with the exterior material. 20. The system of claim 17, wherein an air gap is formed between the layer of foam composition and the external material. 21. The system of claim 20, wherein the air gap has a thickness in a range of from about 0.2 inches to about 0.8 inches. 22. A system for sealing or insulating a large volume, the system comprising: an envelope having walls defining an interior, the interior configured to receive a foaming composition, the envelope initially configured in a retracted configuration; anda foaming composition configured for insertion into the interior of the envelope, wherein the foaming composition is configured to dissolve the envelope;wherein the envelope is configured such that the foaming composition expands the envelope such as to fill a large gap. 23. The system of claim 22, wherein the envelope has the shape of a roll in the retracted configuration. 24. The system of claim 23, wherein the envelope is configured such that the force of gravity also acts to unroll the envelope. 25. The system of claim 22, wherein the envelope includes a series of leak pores configured to allow the foaming composition to escape the interior of the envelope to assist in sealing the large volume. 26. A system for sealing or insulating a pipe or ductwork, the system comprising: an envelope having an inner skin and an outer skin configured for wrapping around the pipe or ductwork, the inner skin and the outer skin defining an interior, the interior configured to receive a foaming composition, the envelope initially configured in a non-rigid structure; anda foaming composition configured for insertion into the interior of the envelope, wherein the foaming composition is configured to dissolve the envelope;wherein the envelope is configured such that the foaming composition expands the envelope such as to form a insulation structure around the pipe or ductwork. 27. The system of claim 26, wherein the envelope extends substantially the lengths of the pipe or ductwork. 28. The system of claim 26, wherein the inner skin and the outer skin are connected to each other by a plurality of members. 29. The system of claim 26, wherein the inner skin and the outer skin of the insulation structure are concentric about the pipe. 30. The invention of claim 26, wherein the inner skin includes a series of leak pores configured to allow the foaming composition to escape the interior of the envelope to assist in sealing the pipe or ductwork.