SiaAir Sandpaper - Foam Grit Discs 7940

SiaAir Sandpaper - Foam Grit Discs 7940




Regular price$40.50
Shipping calculated at checkout.


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You may return damaged or defective merchandise within 30 days of the original purchase date for a full refund minus shipping charges. We will also be glad to exchange the damaged merchandise for anything on our site of equal or lesser value.  Return of orders over $150 will require a 15% restocking fee.

All approved returns must be unopened and unused unless it was deemed damaged or defective.

Any returns of MIDAS Metall® products will require a 15% restocking and must be received back unopened within 1 month of the purchase. 


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Orders are generally shipped 1 business day after your order is processed and will normally take an additional 3 - 7 business days to arrive depending on shipping method requested. Orders are processed Mon-Fri during normal business hours only. Any order placed after 1pm on Friday will be processed the following Monday. If there is an error or delay that is caused by the customer or the shipping carrier then unfortunately we can not be held responsible.

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Sia Abrasives 7940 Siaair Velvet 6" Foam Polishing Grip Discs (7940 Series) are the best choice for achieving the perfect finish.  Perfect for polishing MIDAS Metall®, liquid metal skin, and HV'Art Lacquer Paint (water-based lacquer).

Excellent for fine sanding of round edges, contours, and concave or convex shapes. The foam backing prevents over-sanding. Use dry, wet or with polishing compound. Features a very long working lifetime and is washable for use over and over again.

Siaair is comprised of three unique layers: (1) on the outside, an ingenious net-backed abrasive (2) in the middle, foam cushioning which equalizes the application pressure to prevent over-sanding, and (3) on the inside, the proven Siafast hook and loop grip fastening system. 

  • Click here for SDS sheet and additional info on Siaair.


  • Very long working lifetime
  • Low scratch depth for fine finishing
  • Equalizing application pressure prevents over sanding
  • Minimum clogging when sanding dry
  • Excellent for wet sanding or use with compounds and polish
  • Washable and can be used many times over and over


  • Before painting - final sanding of filler, producing a matte finish, blending base and clear coat
  • After painting - removing dust inclusions, removing paint runs, removing orange peel effect
  • Varnish - fixing errors on high gloss surfaces
  • Curved Parts - buffing up curved surfaces
  • Solid Surfaces - polishing mineral and solid surfaces


  • Net outer layer with aluminum oxide abrasive
  • Open foam structure
  • Siafast hook & loop grip backing

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