Sealing a porous sump - best product?

[fergus]

Hi. I have an ally dry sump pan that has been ground away over time, then subsequently 'filled' by ally welding. Other than using services like Ultraseal, is there a porosity sealant anyone is aware of which would do the same job? I have been told there is an ultra low viscocity product available that is DIY-able. Anyone know if loctite or permabond produce such a product? Or any other similar products for that matter?

I don't want to weld again. I'm also looking for a suitable material to use to bond a thin nylon skid plate to the base of the sump, or even glue a piece of ally on. I've been told that welding a piece on will upset the porosity sealant. Oil runs up to about 90 degrees C, but I gues welding may produce local hotspots far hotter?

[fergus]

thanks for the reply. The sump is intact at the moment, and doesn't leak, but rather, weeps. If I don't solve the porosity issue, any plating will not get rid of the problem!