What Are FK Glue And FSF Glue ?
If you import plywood from Russia, you may find that the glue for their plywood are FK glue or FSF glue . What are FK glue and FSF glue ?
In fact, ‘FK’ stands for Water Resistant Glue (it should be Moisture Resistant Glue) , i.e. MR glue . FK glue is urea-formaldehyde resin (carbamide-formaldehyde resin) , which should meet E1 or E2 grade. ‘FK plywood’ means ‘MR plywood’ . FK plywood is interior plywood which can be used for interior decoration, furniture, packing.
‘FSF’ means ‘water proof glue’ ( it should be ‘water boiling proof glue’), i.e. WBP glue . FSF glue should be phenol-formaldehyde resin . ‘FSF plywood’ is exterior plywood (WBP plywood), which can be used for building & construction, flooring, roofing, furniture, shipbuilding.
The meaning of FK & FSF:
FK – water resistant plywood (Moisture Resistant, MR plywood)
FSF – water proof plywood (water boiling proof, WBP plywood)