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Repairs to uPVC

[dropcap]I[/dropcap]f you have ever fitted a replacement MPL or upgraded to electronic or a better lock you may well have left ‘scars’ behind, maybe you had to move the handles, strikes or security chains etc.

The resulting holes can be filled with a number of solutions and for the smaller holes a hard wax is probably the solution.

Picture1: hard wax

This filler is used to repair white UPVC and is available colour matched  to the UPVC extrusion companies.  It should be used prior to the PF covering lacquer to provide a high quality repair.

The filler needs to be applied with the gas heating iron and then levelled using the special applicator and then 1200 grit wet and dry paper. On the Konig site they list 24 separate ‘White’ colours for various manufacturers.

For bigger holes or fractures they also make a filler Rex Lith – A two component filler, based on polyester resin/peroxide mixed to a ratio of 10:1, with a processing time of approximately 5 minutes. It is ideal for major repairs such as rebuilding corners, cut outs for fittings and break out from screws. Using packing, holes left by strikes can be filled and remodelled (although time consuming)

Suitable for use both internally and externally, Rex Lith has very little shrinkage and can withstand constant heavy use. It can also be sprayed with PF Covering lacquer to help blend in with surrounding surface colour.

Now like all holes you need to ‘key’ the filler in, my first attempt ‘on-site’ was to fill a nightlatch cylinder hole a cowboy had fitted for the electric release he hadn’t fitted……. I backed the hole and filled. Then I smoothed down and filled and smoothed down and when I touched it, to have a 32mm circle of plastic filler pop neatly out of the hole. RATS……

So here is a picture sequence for filling a hole.

Chamfer with a drill to get a key and rough surface

First fill

Second fill

Fine sanding with a smooth grade –wet and dry – wet

All gone!

Ok in certain lights you can see a blemish.

But with the spray and finish coat it was almost invisible and since that time I have done plenty of good fillings makes the difference. Followed by a good clean with Wickes all purpose PVC cleaner.

And again, basic filling:

Once set (about 5 minutes) the spray lacquers are used to get a nice colour match.

www.konig-uk.co.uk

2 Comments

  1. The Boss on 20/04/2012 at 11:31 am

    Watch LASM for news of training classes OPAL are organising

  2. dragonjh on 20/04/2012 at 10:37 am

    Where is the best place to gain training on this type of work?

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