► According the material, it mainly have three types:
1. Phenol Glue - Moisture-proof, excellent water-resistant, weather-resistant characteristics. It can be used outdoors or indoors, can withstand outdoor wind and rain.
2. Melamine Glue - Moisture-proof, with some water-proof and weather-resistant properties. It can be used for outdoor or indoor, but not often impregnated by water.
3. Urea Formaldehyde Glue(UF glue): Moisture-proof, it often be used to indoor, or some outdoor finger joint plywood.
 
► Besides, there are some abbreviation about glue,
1. WBP: Water Boiled Proof
2. MR: Moisture Resistant
3. PSF: Phenolic Surface Film
We often put phenol glue and high quality melamine glue called WBP glue, urea formaldehyde glue called MR glue.