Painting - Primer/Sealer recommendation

I few years ago, I purchased an acrylic/latex primer/sealer that really hid minor wall damage , pine knots, etc real well. I think it was the Glidden gripper line, but it seems like they may have changed the product line since the last time I purchase it. Can anyone recommend a decent product to cover up some roughed up wood trim that has been filled in/smoothed out with joint compound. Over the years the trim, casings,etc have taken a beating, looks fine now after filling in the gaps, but the primer I used isnt cutting it.

thanks Kevin

Zinsser makes good stuff. Check into their line at your local paint store.

I agree
Thought there are some good ones from many companies, you almost always can find the specific primer/sealer for any specific project in the Zinsser line-up
And they are all good at what they do

thanks for the replies guys, I will check out zinsser, I really liked the glidden stuff , It went on thick , good coverage and hid damage well. I have heard good things about zinsser.

are you from canada or usa?
color your world in canada has one called blokker which is the same as gripper(same company)
sherwin williams has one called pro block
http://www.sherwin-williams.com/pro/sherwin_williams_paint/sherwin_williams_paints/paint_primer/pdfs/SW_PrepRite_ProBlock_Primer.pdf

ryan