U-POL 4:1 White High Build Primer, 2277
The U-Pol 2277 Hi-Build Primer is a versatile urethane sand-able primer that can be used as 3 primer functions but changing the reduction amount. Mix 4:1 with no reducer to use as a Hi-Build Primer Filler, Mix 4:1:1 with reducer to use as a primer surfacer, or 4:1:2 to be used as a primer sealer for a final coat prior to applying a color coat.
So far I like the primer. Makes a good filler and easy to sand down. Work great on pen holes in bondo.