Kestopur G 10
1-component polyurethane adhesive

Kestopur G10 is a 1-component PU-adhesive for production of engineered wood products. It complies with the requirements of EN 15425 norm and is approved for manufacturing of CE-labelled gluelam according to EN 14080.

Special features

  • Short pressing time
  • Long open time
  • Contains no fibers
  • Optimal foaming




Kestopur G10 is a 1-component, moisture curing polyurethane adhesive for gluing of wood. The adhesive has been tested by the MPA University of Stuttgart, an independent testing laboratory, and complies with EN 15425:2017 I 70 GP 0,3 (adhesive type I) requirements for spruce, pine and fir. The adhesive does not contain fibres, solvents or formaldehyde. Complies with M1-emission classification for building products. This technical date sheet has been written in co-operation with MPA University of Stuttgart.

Field of application:
EN 14080:2013 CE-labelled gluelam
EN 16351:2015 CLT manufacture
EN 15497:2014 Structural finger jointed solid timber
Manufacture of engineered wood products. Gluing of laminated logs.

Package Size Product Code
Kestopur G 10 220kg/200 l T3961.200
Kestopur G 10 Fluid cont T3961.995


Density/specific weight

approx. 1.2 kg/dm³


Light, white when dry


15000 mPas (Brookfield, RVT 20 °C)

Open time

max. 10 min
(amount applied 180 g/m², wood's moisture 15 %, temperature 20 °C, RH 50 %)

Classifications and certificates

EN 15425 I 70 GP 0,3
AUS/NZ 4364:2010 type I


140 – 180 g/m² finger jointing
140 – 200 g/m² face jointing*
* in optimum conditions an adhesive spread rate below 140 g/m² might be possible. This is allowed only with the permission of Kiilto and the certification body.

Pressing time

Minimum pressing time 20 min
(Coverage ≤ 200 g/m², spruce, wood moisture 12%, pressing and hardening 20 °C / 65 % RH and regularly checked max. 0.1 mm thick bond line)

Compression pressure

0.6 - 1.0 N/mm

Working conditions

Temperature in the hall at least 18 °C. Storage after pressing 2 h at 20 °C before moving to an open storage area.
Relative humidity: During gluing 40 – 75 % and after pressing ≥ 30 % (according to EN 14080, EN 16351)

Application temperature

Minimum working temperature 18 °C

Air humidity

During gluing 40 – 75 % and after pressing ≥ 30 % (according to EN 14080, EN 16351)

Wood moisture content

9 - 18 %


Ready for quality control testing after 16 hours.


Can be stored in a dry and cool place (+10-20 °C). If stored in an unopened original package at +20 °C the shelf life is 9 months.

Instructions for use

When producing according to a harmonized EN standard mentioned above, values according to product manufacturing standards must be followed for all parameters.

The surfaces to be bonded must be clean and dust-free. Suitable for nozzle and ribbon application. Apply the adhesive in an even layer one or two-sided.

Use safety gloves when using Kestopur G 10 adhesive. Wear a breathing mask if spraying the glue and working in temperature above +40 °C.

The open time and pressing time depend strongly on the prevailing gluing conditions, such as moisture of wood and air, air and wood temperature, bond line thickness, wood’s absorbency and the amount of glue applied, so the values given can be regarded as guidance only. Before full-scale production, preliminary tests are to be made to define sufficient pressing time and adhesive joint’s strength.

The adhesive must still be sticky when pressure is applied and in all cases adhesive squeeze out must be observed in the bond line after pressing. The maximum bond line thickness allowed is 0.3 mm. Press time is 4 hours when a thin bond line is not guaranteed.

Remove fresh adhesive stains with a dry cloth and clean the surfaces with acetone or Kiilto Cleaner 307. Cured adhesive can be removed only mechanically.

Additional information

Our instructions are based on extensive investigations and experience, and according to the international practice we can be held liable only for the uniform quality of the product. In view of the large variety of materials and the conditions under which our products are applied, no responsibility can be assumed for the results obtained or any damage caused from the use of the product. Before using the product, especially when introducing new materials, production machinery or methods, the user must carry out tests in order to ensure that the product is suitable for the intended application.

Environment and safety

Avoid unnecessary skin contact and exposure to the uncured adhesive, use safety gloves. Refer to material safety data sheet. For information on product and package disposal, visit