Vinavil is pleased to announce the WEBINAR “Vinavil XT: New Products for Exterior Use for Wood” which will take place on March 14th at 3:00 pm CEST. The webinar will be focused on the development of a new range of 2 component-adhesives in compliance with a recently issued norm EN 17619:2021 that classifies wood adhesives for nonstructural timber products for exterior use.
The new norm was put in place to fill a normative gap in the wood adhesive sector for exterior use, in which for the same application that undergoes specific environmental conditions, different adhesive technologies are deployed ranging from thermoplastic non-load bearing adhesives to thermosetting ones.
The new standard provides three durability classes:
- XT5: Exterior application with rare exposure to direct weathering, in which the glued wooden product is covered by constructive protection from the weather. (e.g.: wooden products behind cladding and products completely protected by roofs, coverings, canopy, or open sheds….)
- XT6: Exterior application with occasional but not persistent exposure to direct weathering, in which the glued wooden product is partially covered by constructive protection.
- XT7: Exterior application with frequent exposure to direct weathering, in which the glued wooden product is not covered by constructive protection and not in contact with the ground (e.g.: decking, outdoor playground equipment…)
The adhesive classified for non-structural applications for exterior use shall have a minimum durability class of D4 as specified in EN 204.
Then, XT class performance of the adhesive shall be carried out with a tensile shear test after two different conditioning distinctly performed sequences:
1) 24 hours boiling water immersion, followed by 1 hour cooling in water at 20°C.
2) Heat conditioning for 1 hour in a ventilated oven at 110 °C.
The simultaneous achieving of the performance in humid environments and heat resistance allows to destinate the adhesive in the specific exterior use.
Vinavil has recently designed a new range of 2 component-adhesives in compliance with two durability classes as follows:
- XT 5 Class: 100 pbw of Vinavil XT500 + 5 pbw of Vinadur 500
- XT 6 Class: 100 pbw of Vinavil XT700 + 20 pbw of Vinadur 700