Red Devil onetime filler - why did I not find this before...

Ta. My fear is is that I would leave it for a year or two - and then find that it had set solid!

I've had a tub of Wickes' lightweight filler for a couple of years at least and it's still useable, but I don't know how it compares to Red Devil.

And it really is lightweight so ideal where gravity is working against you.

In fact, it is so light I recall picking up my first ever tub and thinking it was empty!

Mathew

It's funny stuff - like expanded polystyrene in whipped cream format!

Used some more yesterday and painted straight over an hour later.

It's the first filler where the knife has rendered it dead flat and flush, with no overspill to wiper or sand off and when painted it remained flat.

you can redissolve it in water..

I gave some to my daughter and she had it for about 9 months.

If you fill the gap between the filler and the lid with screwed up plastic bags, it stops it drying out

When I last looked at this I was worried that the finished surface was too soft to take even the slightest knock - has it changed?

It takes a while to harden, that's for sure - but seems to accept paint quite quickly.

To answer your question, I have just poked some (unpainted, 10mm holes filled).

It seems elastic - it had some give but sprung back.

Bubble wrap in a tub

And then she gave birth?

After reading the glowing reports of this stuff here, I'm going to give it a go; on a concrete windowsill (exterior) which needs some filling before painting.

Question: should I pre-treat the rather crappy, powdery substrate with PVA solution before applying it, as I would with plaster or sand/cement? If so, would I apply the Red Devil while the substrate's still damp or let it dry out first?

Thanks

I'd always use a 2 part filler for that sort of thing

I guess that is similar to "car body filler", I tend to get mine from eBay. From the ease of sanding, I assume that "car body filler" has a fairly high content of microspheres.

Yes, a basic polyester resin. The TS version is not an easy sand type and seems higher in resin content. Actually not the ideal consistency for a filler but cheap compared to Halfords!