Seal on the interstice of double-walled fiberglass pipe

A sealer configured to seal an opening between pipes in a double-walled pipe, the sealer comprising:

• a first sealing piece having a rounded cross-section with an attachment portion configured to engage a corresponding attachment portion disposed on a second sealing piece, wherein at least one of the first sealing piece and the second sealing piece includes a thread disposed on at least one of a top surface and a front surface, wherein the first sealing piece and the second sealing piece are connected with a tongue and groove configuration.

A method of sealing an annular space in double-walled pipe including the following steps:

• applying a sealing piece to an inner pipe of double-walled pipe, wherein the sealing piece covers a circumference of the inner pipe, wherein the sealing piece includes a thread disposed on at least one of a top surface and a front surface;
• wherein the sealing piece is disposed in the annular space located between the inner pipe and an outer pipe, wherein the sealing piece comprises greater than or equal to two pieces, and wherein when joined together, the pieces form the sealing piece, wherein the first sealing piece and the second sealing piece are connected with a tongue and groove configuration.