Easyfix Magnetglaze Pro Extreme – large window insulation

Magnetglaze Pro Extreme is a rigid capping with strong 25.4mm wide magnetic tape applied, which pushes onto the edges of 4-6mm glazing sheet to provide a smart finish that can be mitred in the corners for a framed effect. The capping is available in white or brown, and the assembly comes with the adhesive steel tape for attaching to the window surround. Each pack includes a special Mitre Bead, that pushes into the capping jaws to hold it constant for better looking cuts and joints. MG Pro Extreme is a larger and more powerful version of the popular Magnetglaze Pro, that uses 12.7mm wide magnets, making it suitable for small to medium sized windows.

PDF The PDF instruction sheet on this page contains a full step-by-step guide to measuring and installing your capping strips using simple household tools. When fitting, make sure to clean and degrease your window surround using our Surface Preparation wipes before sticking the steel tape into position. Additional accessories include the large Mitre Block, for neat 45 degree corners (note that Magnetglaze Pro Extreme is too large for our standard Mitre Block) and you can remove static when peeling off the plastic sheet protective film using our Anti Static Spray.

Glass should never be used with Magnetglaze Pro Extreme, and completed panels are not suitable for an opening door or window frame, for use on roof lights, or for use outdoors.

Click for more

If your window is so large as to make a single sheet unfeasible, or you want a part-removable pane for easy ventilation purposes, you can use Magnetglaze Sash Heavy Duty. This add-on system uses a rigid joint with additional seals, so that removal and replacement of the pane is instant, with insulation fully restored. Note that MG Sash Heavy Duty is for 4mm thick sheet only.

magnetglaze pro secondary glazing dimensionsThe products on this page can use glazing sheet of up to 6mm thick, which we are unable to provide. The One Stop Plastic Shop do offer this - they are an independent company with whom we have traded for many years. Click through for 6mm cut to size Polycarbonate or 6mm cut to size Acrylic if you want to buy direct from them.

Please note that as Magnetglaze Pro Extreme purchases already include the magnetic and steel tape they use, you do not need to order Magnetglaze Extreme packs for use with them, although you need to specify and order the Pro Extreme packs/lengths of course!

magnetglaze conversion anglesIf there is not enough space on the surfaces of your window surround to fit Magnetglaze Pro Extreme, Window Conversion Angles can be attached on the insides of the frames to give a suitably wide surface. These are strong Angles with a 25mm face, 3mm thick, in white or brown to complement the kits. More information is in the PDF alongside, with product details on the right hand side of this page

There can be window handles, beading, trim or other obstacles that require fitting your Magnetglaze Pro Extreme panel a further away from the window. The combined thickness of the Pro capping and steel/magnetic tapes with their adhesives is just over 4mm, giving you some clearance over the obstacles, but you can also fit our self-adhesive Packing Strips in order to increase this distance. These are flat plastic adhesive strips which are simple to cut and fit. For the Magnetglaze Pro Extreme product, the 25 x 3mm or 25 x 5mm Strips will be the best sizes - fit them to the window frame in the correct position for your panel then stick the steel tape to them, but make sure they are butted up close in order to create a thermal seal for your secondary pane.

To add opaque film to your outer windows, as a smart alternative to net curtains or blinds, you can via our Privacy Frost Window Film page. This cost-effective new product is easy to fit.

Display Prices Ex VAT Inc VAT
Polycarbonate Glazing Sheet

Polycarbonate Glazing Sheet

£59.00 per metre 2

Min height & width 100mm. Max size 2440mm x 1220mm
(height = largest dimension, width = smallest dimension)
N.B. Please check your dimensions carefully before ordering cut sheet as once this has been ordered and cut, it cannot be refunded.

  • mm100-2440mm
  • mm100-1220mm


Magnetglaze Pro Extreme 2440mm Lengths

Bulk Pack 6 x lengths White£72.00
Bulk Pack 6 x lengths Brown£72.00
Single lengths White£18.00
Single lengths Brown£18.00

Window Conversion Angles

Pack 3 x 3m lengths White£30.00
Pack 3 x 3m lengths Brown£34.00
Bulk Pack 10 x 3m lgs White£100.00
Bulk Pack 10 x 3m lgs Brown£112.80

2.44m Packing Strips (Self-Adhesive)

25mm x 3mm single length White£6.50
25mm x 5mm single length White£9.50
12mm x 2.6mm single length White£4.00
Large Mitre Block

Large Mitre Block


Surface Preparation Wipes - Pack of 10

Surface Preparation Wipes - Pack of 10


Anti Static Spray - 100ml Bottle

Anti Static Spray - 100ml Bottle


Microfibre Cloths x 3 Large (random colours)

Microfibre Cloths x 3 Large (random colours)


Easyfix Magnetglaze Pro Extreme – large window insulation Product Reviews

Save Quotation
Your Shopping Basket will be saved and you'll be given a link. You, or anyone with the link, can use it to retrieve your Basket at any time.
Back Save Quotation
Your Shopping Basket will be saved with Product pictures and information, and Basket Totals. Then send it to yourself, or a friend, with a link to retrieve it at any time.
Your basket email sent successfully :)

Display Prices Ex VAT Inc VAT