I am doing an outside painting job, mostly windows previously painted white with undercoat/gloss mostly in good condition.
I usually use Dulux Weathershield undercoat and gloss but the customer has asked me to use Zinsser bin as the undercoat and finish it with my Dulux Weathershield gloss.
I am uncomfortable about not doing what it says on the tin, ie not applying an undercoat before the gloss.
Should I insist and save the customer from himself or am I worrying needlessly?

On 08/09/2018 07:22, Rednadnerb wrote:
Zinsser bin

Shellac based sealer and not necessary an undercoat.

Give the customer the technical data sheet.
http://www.zinsseruk.com/core/wp-con...6/12/B-I-N.pdf

Would a water based paint stick to a shellac coated surface over any
length of time.?


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mailto : news {at} admac {dot} myzen {dot} co {dot} uk

Thanks Alan, that's decided me. Although I'll be using the oil based weather shield gloss the same principle applies. I'll use the undercoat.

On 08/09/2018 10:44, Rednadnerb wrote:
Thanks Alan, that's decided me. Although I'll be using the oil based weather shield gloss the same principle applies. I'll use the undercoat.


There used to be two types of weathershield undercoat.

The DIY version sold in the sheds was water-based, while the
PRO version from trade outlets was solvent-based.

The primer-sealer is now only water-based and is almost
impossible to use outside if the temp is below 20C.

I have discovered the best way to use it is fill an old
oil can with primer-sealer and gently squirt/dribble it over
the timber while rubbing it into the grain with a synthetic
paint brush. This way, even though it is water-based you
can do vertical and overhanging bits of timber without
too much running down your arms.