As you know, GOSTs, regulating the quality of plywood, provide for two classes of water resistance - water-resistant plywood (FK plywood) and plywood of increased water resistance (FSF plywood).

FFS plywood is made from birch, beech or pine veneer with phenol-formaldehyde adhesive resins. The latter determine the high qualities of the material - water resistance, mechanical strength and durability. Such properties allow the use of FSF in construction (roofing and concrete work), car building, as well as in the automotive industry.