Unitec Helmsdorf GmbH, Helmsdorf, Fabrikstr. 21, D-01833 Stolpen, Germany

Phone: +49  35973/ 281 0 ; Fax: +49  35973/ 281 51

e-mail: info@unitec-helmsdorf.de

Internet: www.unitec-helmsdorf.de




Product Information



One component spatula compound


Uses: Spatula compound for the filling of damaged areas of rubber conveyor belts, linings of receptacles, drums and cylinders


Technische Daten:





Specific gravity:

1,3 g/cm³

Application meansl:




Final hardening after:

approx. 24 h (at 20°C)


approx. 1 kg/m² for 1 mm thickness

Primer / Protecting layer:

ELASTOSAL® SPM Primer + Hardener RE

Oil resistance:

oil resistant according to DIN 53521


15 - 20 %

Shore hardness A:

approx. 65 " (after complete curing)

Temperature resistance:


up to 130° C, for a short time up to 150° C


dry, cool

Marking (Dangerous goods):



min. 6 months


tin 500 g, 1 kg


Surface pretreatment: The surface to be repaired must be clean, dry, and free from fat or oil. Roughen the surface slightly by means of an abrasive disc, a wire brush, a scraping tool or the like till all shiny patches have disappeared. Remove all dust completely. Primary coat: Mix ELASTOSAL SPM primer with RE hardener at a ratio of 100: 7 percent by volume. In a closed packing drum the mixture remains usable up to 2 hours. Do not mix more primer than needed. Apply the primer thinly by means of a brush. Apply two layers of primary coat with absorbent grounds like textile belts, for instance. Let the primary coat dry (at 20° C) for approx 30 min before applying the repair filler. Supply of hot air will shorten the drying time. It is also possible to use any other CR-based ELASTOSAL two-component contact adhesive as a primer, eg ELASTOSAL H 20.

Application: Fill the faulty spot with the putty speedily and evenly. The thickness per layer should not exceed 10 mm. Let the filler dry up each time (approx. 8 h at 20° C and 10 mm layer thickness) till your finger does no longer leave an impression in the surface. Hot air supply can can considerably shorten the drying time (approx. 3 h at 50 -60°C). Apply the filler repeatedly, each time after priming, if the filler thickness exceeds 10 mm.

Sealing: ELASTOSAL SPM primer serves also as a protecting layer. Mix the hardener RE as indicated above at a ratio of 100: 7 percent by volume. Do not mix more sealant than needed. Spread the sealant evenly over the surface of the cured filler by means of brush. After a drying time of approx 1 h (at 20° C) the repair will be completed, ie the repair spot has become loadable. With hot air supply the curing time will be accordingly shorter. It is also possible to use any other CR-based ELASTOSAL two-component contact adhesive as a sealant, eg ELASTOSAL H 20.

Note: For constant loading the filler must be fully cured. After completion of the repair the filler further hardens spontaneously. Curing is completed after approx 24 h (at 20° C). An ambient temperature of at least 20° C is necessary for the postcuring phase.

Operators protection: Take note of the danger warnings and follow the security advice on the packaging! Request the “Security Data sheet”!

Waste nr: 080404 ( hardened adhesives) and 080406 (not hardened adhesives)


Remark: The content of this technical information is the result of lengthy research and of experience from many technical applications. All data and advice reflect our current best knowledge. They don’t represent a quality guarantee and don’t exempt the user from making practical tests with the product to obtain the specific requested results and goals he wants. Concerning the advice in this technical sheet, no request for indemnity will be accepted what ever the object or legal case. We reserve the right to make technical changes in line with product development.  Standing 8/2003