Sodium silicate-based adhesive CP-97 is used to fabricate fitting covers for which material?

• A. Fiberglass
• B. Calcium silicate
• C. Aluminum
• D. Plastic

Answer: (B)

Sodium silicate–based CP-97 bonds best to mineral, high-temperature insulation surfaces, so it’s used to fabricate fitting covers for calcium silicate. Calcium silicate provides a mineral, porous surface that readily accepts a silicate adhesive and remains stable under the elevated temperatures and moisture common in insulation environments. This combination yields a durable bond that can handle thermal cycling without deteriorating.

Other materials—fiberglass, aluminum, or plastics—do not provide the same mineral surface chemistry or thermal compatibility, so they require different adhesives or bonding methods. That’s why CP-97 is specifically associated with calcium silicate fitting covers.