Finish 1 FP401-4 Acrylic Primer Surfacer, Gray, 1 qt Can, 1:1 Mixing

Mixing Ratio: 1 part FP401 to 1 part FT210 or FT215. A: FP401 mixes with FT210 or FT215. FT215 is specified above 80 F. Q: Which substrates are listed for FP401?. Q: How soon can FP401 be sanded?. A: FP401 may be sanded in 15 to 20 minutes.