Rigid foam insulation having a tongue-and-groove coupling

A conduit insulating covering comprising:

• a first body and a second body, each made of a rigid foam material and having an exterior surface, an interior surface, end surfaces, first and second connecting edge surfaces, and a semi-cylindrically shaped void extend along said interior surface, and when coupled together said semi-cylindrically shaped voids define a cylindrically-shaped void for receiving a conduit therein;
• each of said first and second bodies having a groove formed into said rigid foam material of said body along said first connecting edge surface, said groove, viewed in a transverse cross-section, tapering from narrow to wide in a direction extending from its opening and into said body;
• each of said first and second bodies having a tongue formed from said rigid foam material of said body along said second connecting edge surface, said tongue, viewed in a transverse cross-section, being triangle-shaped with opposite planar sides, and tapering from wide to narrow in a direction toward said second connecting edge, said tongue being bifurcated along its length into first and second ridges by a wedge-shaped void that tapers from wide to narrow in a direction toward said second connecting edge surface;
• wherein at least said tongue of each of said first and second bodies being substantially coated in polymer coating of polyurea or polyurethane, said polymer coating structurally reinforcing said tongue allowing said first and second ridges to flex toward one another without breaking, which would otherwise break when flexed toward one another without said polymer coating;
• and
• wherein said tongue of said first body is removably receivable by said groove of said second body in a snap-fit engagement and said tongue of said second body is removably receivable by said groove of said first body in a snap-fit engagement.

Rigid foam insulation comprising:

• a first insulating a body formed of a rigid foam material, said first insulating body having a first connecting edge surface and a groove formed into said rigid foam material of said first body along said first connecting edge surface, said groove, viewed in a transverse cross-section, tapering from narrow to wide in a direction extending from its opening and into said body;
• a second insulating body formed of a rigid foam material, said second insulating body having a second connecting edge surface and a tongue formed from said rigid foam material of said second insulating body along said second connecting edge surface, said tongue, viewed in a transverse cross-section, being triangle-shaped with opposite planar sides, and tapering from wide to narrow in a direction toward said second connecting edge, said tongue being bifurcated along its length into first and second ridges by a wedge-shaped void that tapers from wide to narrow in a direction toward said second connecting edge surface;
• said first and said second insulating bodies being substantially coated in a polymer coating of polyurea or polyurethane, wherein said polymer coating structurally reinforcing said tongue allowing said first and second ridges to flex toward one another without breaking, which would otherwise break when flexed toward one another without said polymer coating;
• and
• said first and said second insulating bodies being removable connected by inserting said tongue into said groove.