Dear Metallo,

Hope you're well and stay so. Factory-original hatch sealing strips (gaskets) did not come with any sealant, butyl rubber or otherwise.

On my 940, the hatch sealing strip has no sealant of any sort. I've the maintenance records since new. There's nothing to show the sealing strip was replaced. Thus, if there had been a factory-supplied sealant, there's be some signs of it even if the gasket had been replaced. The same is true for the fixed-position windows on either side of the cargo space: no sign of any sealant.

I'd remove every trace of old sealants. I usually use methyl ethyl ketone (MEK) - a chemical cousin of acetone - to remove old sealants/adhesives.

MEK is highly flammable, so do the work out in the open (i.e., not within a garage or any other building). Wear nitrile gloves: MEK is carcinogenic and mutagenic.

To help seat the replacement gasket, lubricate it - and the metal channel into which it fits - with dish-washing liquid.

Hope this helps.

Yours faithfully,

>b> Spook