400ea SP3X4HLF150.4 SurfPrep 3" x 4" Hook & Loop Aluminum Oxide Film Abrasive Sheet with a 4-Hole Vacuum Pattern in 150 Grit.

Film-backed sanding sheets for leveling and finish work.

3″ x 4″ SurfPrep film sheets for leveling and finish sanding

Film-backed abrasives are the sheets you reach for when you want a clean, even result, leveling a surface or putting on the finish pass. The film backing holds the grit flat for a consistent finish, cuts faster, and the tear-resistant edges hold up longer than paper.

The grit is aluminum oxide, and a sacrificial stearate coating keeps loading to a minimum, so the sheet stays cutting instead of clogging. They run on a hook and loop backing that grips the pad and pulls off clean.

Specs

  • Aluminum oxide, film backed
  • Hook and loop backing
  • 3″ x 4″
  • 100 sheets per box
  • Stearate coating for minimal loading

The manufacturer's part number can be broken down to understand its exact specifications: 

  • SP: SurfPrep (Manufacturer)
  • 3X4: 3 inches by 4 inches physical dimensions
  • HL: Hook & Loop backing attachment mechanism
  • F: Film backed material (as opposed to standard paper or foam, making it highly tear-resistant)
  • 150: 150 Grit rating, typically used for leveling, medium material removal, and finish preparation
  • .4: 4-Hole vacuum pattern designed to work with dust-extraction sanders
  • Key Features
    • Loading Prevention: Features a modified open-coat configuration with a sacrificial stearate coating to minimize loading, preventing dust build-up while you work. 
    • High Durability: The premium film backing provides an incredibly uniform scratch pattern while fiercely resisting edge wear and tearing compared to traditional paper alternatives. 
    • Packaging: These industrial abrasives are typically distributed in commercial quantities of 100 sheets per box. 
    They are commonly utilized for professional woodworking, cabinet construction, automotive preparation, and general surface flat-leveling applications

  • Frequently asked questions

    What are SurfPrep film sheets used for?

    They are film-backed abrasives used for leveling and finish sanding. The film backing holds the grit flat for a consistent finish, cuts faster, and the tear-resistant edges hold up longer than paper, so they are the sheets you reach for when you want a clean, even result.

    How many sheets come in a box?

    There are 100 sheets per box, in the 3 by 4 inch size. They run on a hook and loop backing that grips the pad and pulls off clean.

    What is the difference between film and paper SurfPrep sheets?

    These are film-backed, with the film holding the grit flat for a consistent finish, a faster cut, and tear-resistant edges that last longer than paper. The grit is aluminum oxide and a stearate coating keeps loading to a minimum.

    Do these sheets clog up while sanding?

    They are made to resist it. A sacrificial stearate coating keeps loading to a minimum, so the sheet stays cutting instead of clogging. The aluminum oxide grit on a film backing gives a consistent finish.


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