Prefere 4094 is a phenolic resorcinol adhesive for the production of load-bearing wood components as well as for bonding joints with adhesive joints up to 1.5 mm thickness. This includes the gluing of cross laminated timber (CLT), glulam, laminated beams, butt joints on solid wood, universal finger-jointed joints as well as special applications such as screw press gluing and reinforcements, block gluing of glued laminated beams or the manufacture of load-bearing timber components under conditions where the normal requirements for the pressing pressure cannot be met.
Prefere 4094 can also be used in boat building or for the manufacture of products exposed to high humidity, such as windows, exterior doors, garden furniture or playground equipment.
If the adhesive is used according to the specifications in this technical data sheet, waterproof and weatherproof bonds can be achieved that comply with adhesive type 1 of the European Standard EN 301:2013.
Prefere 4094 with the hardener Prefere 5827 was tested by the MPA, Otto-Graf-Institut, Stuttgart and NTI (Norsk Treteknisk Institutt) according to EN 301:2013 and therefore fulfils the requirements for the production of load-bearing glued timber components, load-bearing finger-joints and cross laminated timber (CLT) according to DIN 1052, EN 14080:2013, EN 15497:2014 and EN 16351:2015.
The DIBt (German Institute for Building Technology) has approved Prefere 4094 for the flat fibre-parallel bonding of load-bearing timber components with an adhesive joint thickness of up to 1.5 mm according to the general building authority approval no. Z-9.1-840. The adhesive may also be used to bond glued laminated timber or laminated beam timber using universal finger-jointed joints as well as for bonding of leg joints and reinforcements with an adhesive joint thickness of up to 0.5 mm. The provisions of abZ No. Z-9.1-840 must be observed.
The classification according to EN 301:2013 provides designations for adhesives which include the adhesive class, intended use and area of application. According to the designation system according to EN 301:2013, the adhesive system for bonding spruce (Picea abies), pine (Pinus sylvestris), fir (Abies alba), European larch (Larix decidua), Siberian larch (Larix sibirica) and Douglas fir (Pseudotsuga menziesii) has been classified as follows:
- EN 301-I-90-GP-0,6-M
- EN 301-I-90-GF-1,5-M
- EN 301-I-90-FJ-0,1-M
Prefere 4094 with the hardener Prefere 5827 is approved according to JIS K 6802 and meets the requirements for the production of load-bearing glued wood components as well as for finger-jointing according to JAS MAFF.
Prefere 4094 with hardener Prefere 5827 is approved for the production of load-bearing wooden components FCBA (France) and KOMO (Netherlands).