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Technical Information


Solvent free, Elastic, One-component Sealant for Multipurpose Application Base: Amine Curing Silicone Rubber Status: 02.06.2003

Product Description

Terostat-33 is a gun-grade, solvent free, one component sealant based on amine curing silicone rubber, which cures by reaction with moisture to a soft elastic product. The skin formation and curing times are dependent on humidity and temperature, and the curing time also depends on joint depth. By increasing the temperature and moisture these times can be reduced; low temperature as well as low moisture retard the process. After full curing Terostat-33 is odourless (i.e. it does not influence taste and odour when in contact with unpacked food stuffs), light resistant and demonstrates good adhesion properties, good chemical resistance and nuclear decontamination properties (ask for further details, test certificates are available). Due to its curing system, no corrosion in edge areas, as well as on laminated materials is to be expected. When sealing fresh, light coloured paints, a weak yellow colouration can occur during curing.

Application Areas

Terostat-33 is used for the following applications: sealing aluminium, steel (stainless and stove enamelled) and rigid PVC parapet elements sealing expansion and butt joints on aluminium facades, rigid PVC frame constructions and in ventilation systems sealing acrylic glass constructions in machine and apparatus construction: sealing steel to steel, aluminium, plastic, ceramics, glass, enamel, e.g. household appliances (refrigerator, dish washer, oven) as well as containers, grinding, drying and washing equipment in the vehicle industry: seam and joint sealing for railway carriages, vehicle build-ups, caravans,buses, tractors, trucks etc.


Technical Data

Colour: Odour: Consistency: Density: Curing mechanism: Curing system: Skin formation time: (DIN 50014 standard climate: Cure rate: (DIN 50014 standard climate: Shore-A-hardness (DIN 53505): Tensile strength( DIN 53504): Elongation to break (DIN 53504): Stress at 100 % elongation (DIN 53504):

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transparent, white, grey, black of amines, after curing odourless paste approx. 1.03 g/cm³ humidity curing amine approx. 10 mins 23°C, 50 % rh) approx. 2 mm/24 h 23°C, 50 % rh) approx. 22 approx. 1.2 MPa approx. 250 % approx. 0.5 MPa

Issue: 12.08.2002


Shear strength (based on DIN EN 1465): Volume change (DIN 52451): Permitted permanent movement: Application temperature: In service temperature range: Temperature resistance: Short exposure (up to 1h)

approx. 0.6 MPa max. 5 % 25 % 5°C to 40°C - 40°C to 150°C 200°C

Important Indication

We recommend observance of relevant technical guidelines and standards depending on the particular application area concerned.


No primer is necessary on glass, baking enamel, fully dried alkyd or synthetic resin paints, glazed ceramics. For the application on construction substrates (e.g. concrete and masonry) the use of Primer-133 is necessary; metals have to be primed with Primer-102, plastics with Primer-136. Due to the different surface conditions of anodised aluminium we recommend pretrials. Concerning pretreatment of substrates not mentioned above see Terostat Primer Table. Terostat-33 will not adhere to polyethylene, Teflon , Hypalon etc. and must not be used for polycarbonate. Plastics not mentioned above should be subject to trials before use.

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Preliminary statement

Prior to application it is necessary to read the Safety Data Sheet for information about precautionary measures and safety recommendations. Also, for chemical products exempt from com-pulsory labeling, the relevant precautions should always be observed.


The substrates must be clean, dry, oil and grease free. For cleaning, Cleaner-A, Cleaner-D, Cleaner-FL from the Teroson range are suitable.


Application from 310 ml cartridges is made with the Teroson Hand or Air Pressure Pistols. In the case of compressed air application a pressure of 2 - 5 bar is required, depending on nozzle aperture and speed of application. When applying Terostat-33 in closed rooms ensure good ventilation during the curing process. When using a primer ensure that the joint edges are not primed because discoloration may occur after a period of time. When sealing butt joints in cold stores and rooms, amine vapours emitted can remain present. It is, therefore, important to ventilate particularly well during the curing process. In all cases Terostat-33 comes in direct contact with food stuff or fresh water (e.g. aquariums) the cured bead must be washed thoroughly in advance with water. Avoid contact of light coloured Terostat-33 with rubber and artificial rubber profiles, as well as bitumen based foams, as discoloration and other damage to the sealant can be caused by extractions from these substrates.


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If smoothing of the bead is necessary this has to be done within skin formation time, i.e. 5 - 10 minutes. Terostat-33 can be smoothed with soapy water. Where joint edges have been masked the masking tape has to be removed immediately to avoid tearing of the fresh forming skin.


Uncured or not fully cured Terostat-33 can first be removed by a knife or spatula. The remaining layer can be washed off with Cleaner-A, Cleaner-D or similar products. Fully cured sealant can only be removed mechanically by means of a suitable tool (e.g. a sharp blade) or by burning off, for the product is insoluble in all common solvents.

Painting Properties

Like all silicone sealants Terostat-33 is not compatible with paints.

Test Certificates

certificate regarding decontamination of surfaces in accordance with DIN 25415 T1 (Kernforschungszentrum [Nuclear Research Center], Karlsruhe, dated 08.05.1981) certificate regarding decontamination of surfaces in accordance with DIN 25415 T1 (Kernforschungszentrum [Nuclear Research Center], Karlsruhe, dated 08.05.1981) ® testing or stress corrosion cracking of Plexiglass in accordance with DIN 53449 (Röhm GmbH, Darmstadt, dated 31.08.1983) testing of resistance against mould fungus in accordance with ISO 846/1978 method A (Bundesanstalt für Materialprüfung, Berlin, dated 02.10.1991


Bundesbahn-Stoff-Nr. 588.55.03 (German railway) Bundeswehr-Versorgungs-Nr. 8030-12-166-7697 (German army)


Frost-sensitive Recommended storage temperature Shelf-live no 10°C to 25°C 18 months in original packaging


Cartridge 310ml


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Hazard Indications/ Safety Recommendations/ Transport Regulations

see Safety Data Sheet


The data above, particularly the recommendations for application and use of our products is based on our knowledge and experience. Due to different materials and conditions of application which are beyond our knowledge and control we strongly recommend carrying out sufficient tests in order to ensure that our products are suitable for the intended process and applications. Except for willful acts any liability based on such recommendations or any oral advice is hereby expressly excluded. This Technical Data Sheet supersedes all previous editions.

Henkel KGaA . 40191 Duesseldorf Distribution: Henkel Teroson GmbH . 69123 Heidelberg . Germany Phone +49-6221-704-0 . Fax +49-6221-705-242 [email protected] .


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