Easyfix Magnetglaze Sash 4mm Jointing Kits

Secondary glazing magnetglaze available to order online
Order secondary glazing magnetglaze online from Secondary DIY Glazing

Magnetglaze Sash enables you to insulate your windows with a jointed magnetic plastic panel. Instead of using a single large sheet, or for the convenience of part access to the window for regular ventilation, you can simply join two panels using the specially designed jointing strips, which will maintain a thermal seal.

Magnetglaze Sash Heavy Duty works with 4mm sheet for larger and draughty windows, making the panels easy to handle and fit into the rigid jointing strip, making them more stable against the natural movement caused by draughts.

Note that the kits are add ons for Magnetglaze edging systems, which also need to be purchased along with the Polycarbonate or Acrylic glazing sheets.

Magnetglaze Sash Heavy Duty (4mm)
Installation Video

Click to download
Magnetglaze Sash Heavy Duty instructions

Secondary Sash Heavy Duty PDF Download


The Heavy Duty Sash kits are designed to use 4mm Polycarbonate or Acrylic glazing sheet, providing a more stable and rigid joint to make large windows easier to handle, and to counteract the effects of draughts on old sash windows. The rigid H Section joint has been specially designed to permanently grip the static pane, providing an easy to fit but still thermally sealed joint for the removable pane.

In addition to Magnetglaze / MG Extreme, the Heavy Duty kits can be used with Magnetglaze Pro / MG Extreme, but only with 4mm sheet. The clips contained in the the kits will accommodate either system, to anchor or reinforce one or both panels.

magnetglaze sash heavy duty jointed panel kits

Pack Contents:

  • 4 x 1500m lengths of White or Brown H Section
  • 12m coil of Bristle Seal in White or Brown
  • 4 x Surface Preparation Wipes
  • 50 Turnbutton Clips in White or Brown
  • 50 Woodscrews
Product Code Colour £ ex Vat
Magnetglaze Sash Heavy Duty Kit MGS04W White 29.20
Magnetglaze Sash Heavy Duty Kit MGS04B Brown 29.20

Heavy Duty Magnetglaze Sash kits can be purchased online with either Magnetglaze or Magnetglaze Pro (standard and Extreme versions) and cut to size Polycarbonate glazing sheet by following this link:

link to secondarydiyglazing dot com

PLEASE NOTE You can buy items from this site by phone subject to a £50 goods minimum order, plus Carriage and Vat. Alternatively, all Secondary Glazing and Draught Excluder products are available to buy online, in packs or singly, with cut-to-size sheet, from secondarydiyglazing.com.

magnetglaze sash secondary glazing £50 minimum order
pay for your magnetglaze sash seasonal glazing by card on the phone
magnetglaze sash diy glazing carriage guidelines
magnetglaze sash insulation glazing handy packs from stock