Kestopur 300/2
2-component solvent-free pu-adhesive

Kestopur 300/2 is a two-component polyurethane adhesive for sandwich panel constructions in exterior door manufacture.




Kestopur 300/2 is a two-component PU adhesive which gives a very strong bond. Only for automatic application. Used in conjunction with Kestopur 200/S hardener. Suitable for the gluing of e.g. wood, metals, insulation materials and polyester laminate.

Package Size Product Code
Kestopur 300/2 kontti T1425.992

Polyurethane adhesive

Density/specific weight

Resin approx. 1.60 kg/dm³, Hardener approx. 1.20 kg/dm³

Lap shear strength

SS 7 N/mm² (28 d 23 °C, 50 % RH)

Tensile strength

7 N/mm² (DIN 53504)

Elongation at break

20 % (DIN 53504)


Shore D 65

Mixing ratio

5 weight parts Kestopur 300/2 resin + 1 weight part Kestopur 200/S hardener


Resin: approx. 20,000 mPas, Hardener: approx. 200 mPas (Brookfield RVT 20 °C)

Mixture viscosity

approx. 7000 mPas (Brookfield RVT 20 °C)

Mixture colour


Pot life

1Min 50 sec (120g, 20 °C, RH 50 %)

Open time

max 2 min


200–500 g/m² depending on materials

Pressing time

at least 8 min / 20 °C


Unopened at +10–25 °C in a container (1000 l) for 6 months, in smaller containers 12 months. After long storing, stir before use.

Instructions for use

The surfaces to be bonded must be clean and dry. Remove oxides by sanding, and grease and other dirt with Kiilto Cleaner 303. The properly cleaned surface can be sanded and then primed to improve adhesion. Remove the sanding dust carefully prior to adhesive application. Stir Kestopur 300/2 resin before use. Add Kestopur 200/S hardener to the resin and mix until a uniform colour is achieved. Apply the adhesive on one or both sides of the materials to be bonded. Fresh adhesive stains are removed with a dry cloth and surfaces are wiped with Kiilto Cleaner 303 or Kiilto Cleaner 302. Hardened adhesive can only be removed by mechanical means. We recommend gluing at room temperature. The open time of the adhesive depends on temperature and air humidity. However, the gluing can be carried out at lower temperatures (even at +10 °C), but then the pressing time will be significantly longer and spreading properties will suffer. A higher pressing temperature will shorten the pressing time.

Additional information

The information given in this product data sheet is based on our tests and our practical knowledge. The technical data is defined in standard conditions. Variations in local working conditions will affect the product performance and result. The result is also strongly affected by working methods. We guarantee the high quality of our products according to our Quality Management System. No liability can be accepted from incorrect use of the product or prevailing conditions, over which we have no control. Thus, we cannot be held responsible for the final result. The user of the product must test the product’s suitability for the intended application.

M1 emission classification for building material
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