Refractories Specialties Products

Introduction
The Fiberfrax® Specialties family of products includes Fiberfrax moldables, pumpables, caulks, coating cements, rigidizers, tamping mix, and Moist-PackTM blanket. Many of these products contain a wet, inorganic binder to provide both strength and hardness at elevated temperatures. The range of product forms provides a choice of materials to address a wide range of appli- cation problems, such as resistance to hot gas erosion, flame impingement, the ability to be formed into special shapes and configurations, installation into blind hot spots and hard-to- insulate areas.

Fiberfrax Specialties also possess the advantages inherent with other Fiberfrax ceramic fiber insulating materials: high tem- perature resistance, excellent insulating properties, thermal shock resistance, chemical stability, and ease of installation.

Fiberfrax Coating Cements and Rigidizers
Fiberfrax QF-180TM, QF-180TM Blue, and QF-150TM coating cements provide a range of consistencies for brush, spray, and trowel-on application. These coatings have 1260°C (2300°F) temperature grade rating. They possess good adhe- sion, thermal reflectance, dielectric strength, hot gas erosion resistance, and effectively resist wetting by many nonferrous molten metals.

Fiberfrax TopcoatTM 3000 and TopcoatTM M coating cements have a temperature grade rating of 1538°C (2800°F). Topcoat 3000 consists of a blend of regular ceramic fibers and high- temperature Fibermax® polycrystalline fibers combined with an inorganic binder system. This product imparts excellent flame and hot gas erosion resistance to other product forms and effectively minimizes thermal shrinkage of fiber blankets, modules, and boards. Topcoat M is a blend of Fibermax fibers in a dry powder form which is mixed with a prescribed amount of potable water at the job site. It provides protection against slag and alkali attack when applied to Fiberfrax high-tempera- ture boards and modules.

FiberstickTM refractory cement is a high-temperature, air- setting mortar used as an adhesive to securely bond Fiberfrax Bonded modules and other product forms to refractory surfaces.

RigidizerTM and RigidizerTM W, inorganic liquid hardeners, have a temperature grade rating of 1260°C (2300°F). They are generally used to increase the durability and surface ero- sion resistance of Fiberfrax blanket and board products. Rigidizer W hardener contains an organic wetting agent to promote saturation into the substrate, whereas Rigidizer hard- ener tends to remain on the material surface of the product form to which it is applied.

Fiberfrax Moist Pak-D® and Casting Mixes
Fiberfrax Moist Pak-D is a moldable and formable blanket insulation containing an inorganic wet binder. It dries upon firing to a hard shape having a dry density of 12-18 pounds/ cubic foot. Moist Pak-D insulation possesses excellent ther- mal insulating properties and effectively resists hot gas velocities well in excess of 100 feet/second.

Moist Pak-D insulation is used primarily as a surface layer over Fiberfrax blanket linings in hot gas erosion applications (e.g., hot gas ducts, breechings, convection boxes, flares, etc.). It is also used to protect alloy hardware exposed to high temperatures, as a durable insulating cover for exhaust lines, around burner assemblies, and wherever a formable blanket is needed to provide strength and hot gas erosion resistance.

Fiberfrax FC-25 tamping mix and Vari-FormTM castable materials provide casting mixes which can be applied in small areas such as furnace access and site doors, tube sheets, and as a refractory backup.

FC-25 tamping mix is a wet mix containing Fiberfrax fibers and inorganic binders. It is poured directly from the container and tamped into place. Dry density is 20-25 pounds/cubic foot. Vari-Form is a dry mix available in two density grades of 30-40 and 50-60 pounds/cubic foot. Water is added to the dry product at the job site and mixed thoroughly. It is then simply poured and troweled into the area to be insulated. The mix sets in about 18 hours and can then be heated to operating temperature.

Typical Applications
Fiberfrax Coating Cements and Rigidizers
QF-150, QF-180, & QF-180 Blue
• Electrical insulation coatings and potting
• Adhesive for other Fiberfrax product forms
• Surface coating for other Fiberfrax product forms
• Radiant coatings for variety of substrates
• Flame-resistant coatings
• Surface coating for molten aluminum contact
• Oxidation-resistant coating for injection tubes and graphite crucibles

Topcoat 3000 & Topcoat M
• Protect high-temperature Fiberfrax lining systems from slag and alkali attack
• Improve hot gas erosion resistance of Fiberfrax high- temperature linings
• Reduce thermal shrinkage of hot face in high-temperature refractory and ceramic fiber linings
• Fill hot face surface cracks

Rigidizer & Rigidizer W
• Rigidizer for surface hardening of other Fiberfrax product forms
• Rigidizer W for saturating and rigidizing other Fiberfrax product forms
• Erosion-resistant coating for surfaces subject to high- velocity hot gases

Fiberstick Cement
• Adhesive for Fiberfrax bonded modules