SPF

SPF may refer to:

==Science and technology== Sun protection factor, of sunscreen Specific-pathogen-free, laboratory animals known to be without pathogens Superplastic forming, of sheet metal Space Power Facility, a NASA test facility S-phase-promoting factor, in biology Formal spectrum of a ring, a construction in algebraic geometry Spray polyurethane foam, a building insulation material Spruce-pine-fir, mixed softwood timber Spot 42 RNA, a small regulatory RNA found in some Gammaproteobacteria