Products : Surface Prep : Wall Patching : Fix-It-All® Patching Compound

Fix-It-All® Patching Compound

Custom’s Fix-It-All® All-Purpose Patching Compound is a fast-setting, non-shrinking patching compound in a powdered form. It mixes quickly in water and sets hard in 30 minutes. Fiber reinforcement allows Fix-It-All to be sawed, drilled, filed or sanded after drying.

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Key Features

  • Strong bond
  • Does not shrink
  • Can be sawed and drilled when hard


  • Fix-It-All is used to repair cracks and holes in plaster, gypsum, wallboard or wood surfaces.
  • It has high compressive strength and therefore makes an excellent floor underlayment for patching and leveling prior to installation of resilient floor coverings.
  • In addition, it can be used for models and in molds.


  • Fast-setting patching compound
  • For repairing cracks and holes in plaster,wallboard, and wood
  • Strong bond
  • Does not shrink
  • Can be sawed and drilled when hard


Conformance to Building Codes

Installation must comply with the requirements of all applicable local, state and federal code jurisdictions.

Environmental Consideration

Custom® Building Products is committed to environmental responsibility in both products produced and in manufacturing practices. Use of this product may contribute to LEED® certification.

General Surface Prep

USE CHEMICAL-RESISTANT GLOVES, such as nitrile, when handling product.

Surfaces must be structurally sound, clean, dry and free from grease, oil, dirt, curing compounds, sealers, adhesives or any other contaminant that would prevent a good bond. Glossy or painted surfaces must be sanded, stripped and cleaned of waxes, dirt or any contaminants. Plywood flooring including those under resilient flooring must be structurally sound and meet all deflection requirements. For questions about proper subfloor installation, call Technical Services. Do not sand flooring materials containing asbestos. Ambient temperature, surfaces and materials should be maintained at a temperature above 50° F (10° C) or below 100° F (38° C) for 72 hours. Fix-It-All is formulated for interior use in dry areas. Avoid areas continuously exposed to water. Do not place on concrete where a hydrostatic moisture condition may exist.

Health Precautions

It is recommended that an approved respirator be worn while sanding. Wear rubber gloves and eye protection. Avoid prolonged contact with skin. This product may develop sufficient heat to cause burns if a large mass is allowed to harden in contact with the skin. Keep out of reach of children. Do not take internally.

Limitations to the Product

Bonding to Concrete Surfaces

Concrete or plaster must be fully cured and must accept water penetration. Test by sprinkling water on various areas of the substrate. If water penetrates, then a good bond can be achieved; if water  beads, surface contaminants are present, and loss of adhesion may occur. Contaminants should be mechanically removed before installation. Concrete must be free of efflorescence and not subject to hydrostatic pressure. Concrete slabs should have a broomed or  brushed finish to enhance the bond. Smooth concrete slabs must be mechanically abraded to ensure a good bond.

Bonding to Plywood Surfaces

Plywood floors, including those under resilient flooring, must be structurally sound. For questions about proper subfloor installation, call Custom® Building Products.

Mixing Procedures

Slowly add powder to liquid while mixing with a low speed drill (300 RPM or less) and mixing paddle to a lump-free, heavy paste consistency. Always use clean tools and mixing containers. A mixture of 6-1/2 oz. (192 ml) water to 1 lb. (.45 kg) powder is recommended. Do not overthin. Avoid mixing more than can be used within 10 minutes. Substitute Patching Latex Additive for water for better bond strength over cutback adhesive, sheet vinyl, terrazzo, ceramic tile, plywood, and when leveling embossed sheet vinyl flooring.

Application of Product

Force material into all cracks and voids up to 1/2" (13 mm) thickness using a broad knife or trowel and finish flush with surface. For skim coating, use a smooth-edged trowel to level the surface area. Only spot patching should be done on wood surfaces. If a leveling layer over 5 ft. (1.5 M) in diameter is required, use an appropriate Custom® self­leveling underlayment.

Drying Time

30 minutes

Cleaning of equipment

Clean tools with water before Fix-It-All hardens.


Close container after each use. Store in a cool, dry area. Keep from freezing.

Product Maintenance

Properly installed product requires no special maintenance.

Warranty Information

Product Warranty

Custom® Building Products warrants to the original consumer purchaser that its product shall be free from defects in material and workmanship under normal and proper usage for a period of one year following the date of original purchase. Custom's® sole liability under this warranty shall be limited to the replacement of the product. Some states, countries or territories do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty will not extend to any product which has been modified in any way or which has not been used in accordance with Custom's® printed instructions. Custom® makes no other warranties either expressed or implied. This warranty gives you specific legal rights, and you may have other rights that vary from state to state or from one country/territory to another.  This warranty is not transferrable.

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