ELASTOSIL® E60 N Grey

1 of 230 products in this brand
ELASTOSIL® E60 N Grey is a flowable, one-part silicone rubber for potting and coating applications. When exposed to air moisture, it cures at room temperature to yield a permanently flexible silicone rubber with excellent heat resistance. Fully vulcanized ELASTOSIL® E60 N Gray shows long-term stability against weathering, moisture, and UV radiation. The silicone elastomer may continuously be exposed to constantly changing climatic conditions, UV radiation, and temperatures as high as 230°C without damage.

Product Type: 1K (1 component) Sealant, Encapsulant, Potting Compound

Application Area: Cooking Appliances, White Goods

Cure Method: Air Dry, Moisture Cure

Chemical Family: Silicones

Technical Data Sheet

Knowde Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Specific Features
  • Condensation-curing
  • Electrically insulating
  • Food grade
  • Low viscosity
  • One-component
  • UV & weathering-resistant

Applications & Uses

Applications
  • Baking Tray Coatings
  • Machine Building
Application Details
  • Multipurpose grade for coating and potting, in particular for food related applications
  • Typical fields of application: household appliances, mechanical engineering, bakeware equipment
Processing
  • ELASTOSIL® E60 N Gray is a ready-to-use, one-part silicone rubber which starts curing when exposed to air moisture. Typical curing characteristics are given in the table "Properties Uncured". As RTV-1 silicones require humidity for curing, free access of air moisture to the silicone rubber is essential.
  • Additionally, the vulcanization time of ELASTOSIL® E60 N Gray can be greatly reduced by increasing the level of air's relative humidity. Please note that, unlike the initial skin formation, the total curing rate of RTV-1 silicones is limited by moisture's diffusion speed in silicone rubber.
  • ELASTOSIL® E60 N Gray typically is vulcanized at room temperature. Heat curing is recommended only for applications where the silicone rubber is applied as a thin coating (thickness less than 0.5 mm), because otherwise blistering is likely to occur due to the quick release of acetic acid.
  • After completion of the vulcanization the silicone elastomer may continuously be exposed to constantly changing climatic conditions, UV radiation and high temperature without damage. Cured ELASTOSIL® E60 N Gray usually shows good primerless adhesion to many substrates, e.g. glass, ceramics, metals, plastics and powder coatings.
  • We recommend running preliminary tests to optimize conditions for the particular application.

Removal

If removal of the silicone from machines, metering and application equipment is necessary, white spirit or similar nonpolar solvents are recommended. However, cleaning ideally should take place before the silicone rubber is fully vulcanized. Cured silicone needs to be rubbed off or removed mechanically, if necessary in combination with a swelling agent (solvent) or a chemical silicone remover.

Example of Use
  • Baking Tray Coatings: ELASTOSIL® E60 N Gray is designed to create long-lasting, non-stick coatings for an optimum release of bakery products. Baking trays coated with silicone rubber are particularly suitable for croissants, buns, white bread, brown bread and sourdough bread.
  • Surface Preparation: Though ELASTOSIL® E60 N Gray shows primerless adhesion to many substrates, the trays to be coated should be cleaned prior use in order to remove any dirt, rust, oil or grease. If required, the surface of the trays can be roughened by sandblasting to improve the adhesion of the silicone rubber coating.
  • Priming: For an optimum of adhesion it is recommended to additionally prime the trays with WACKER® Primer G 790 or WACKER® Primer G 790 TOLUENE FREE. Both primers are best applied by spraying; dipping or brushing is also suitable.

Please Note

As a too thick primer layer can reduce adhesion, both WACKER® Primer G 790 and WACKER® Primer G 790 TOLUENE FREE should be applied as a very thin coating only (< 2 µm thickness). In order to minimize the layer thickness, it is recommend to dilute the primers directly before use with a nonpolar and technically dry solvent (cyclohexane, white spirit or a similar aliphatic solvent) in a 1:1 or 1:2 ratio (primer:solvent). Please mind the food compliance of the solvent used for diluting ! For further details regarding priming with WACKER® Primer G 790 or WACKER® Primer G 790 TOLUENE FREE, please revert to the respective technical data sheet. When the primer solution has been applied, the primed parts must be air dried for at least 15 minutes to allow all solvents to evaporate. Finally, the primer layer is baked at 150 to 170 °C for 20 minutes.

Preparation of the Coating Suspension

Though ELASTOSIL® E60 N GRAY is flowable and self-leveling, the product needs to be diluted before use in order to get optimum coating results. Suitable diluents are non-polar, aliphatic solvents such as technically dry cyclohexane, white spirit or a similar aliphatic grade (please mind the food compliance of the solvent used !). A mixing ratio of 1:1 to 2:1 (solvent:silicone rubber) is recommended.

Important

once prepared, the coating mixture has to be stirred continously in order to prevent the separation of fillers. Furthermore the container should be humidity-tight and must be kept properly closed, because the coating suspension is sensitive to moisture.

Coating

The coating mixture can be applied by any coating method, such as spraying, dipping and brushing. However, airless spraying equipment is particularly recommended, as this avoids premature curing of the silicone rubber suspension during spraying. Since the film thickness is essential for the durability of the anti-stick coating, the silicone rubber suspension should be applied in a quantity of some 150 g per m² (including overspray). Multilayered application is possible, e.g. for baking pans with a a complex design. In total, the rubber coating should have a thickness of 150 µm (minimum) to 350 µm (maximum) after curing.

Curing

The curing process already starts during application, in the moment when the coating suspension gets in contact with air moisture. For physical drying it is recommended to store the coated trays for at least 60 minutes at room temperature in order to allow the solvents to evaporate. Subsequently the coating is baked at 250°C for 1 hour (alternatively: 4 hours at 200°C).

Coating removal (deglazing, restoration)

Coated baking trays and pans can be restored either by pyrolysis at a temperature above 600°C, followed by cleaning via sandblasting, or by chemical methods (immersion into a highly basic etching bath, followed by thoroughly rewashing the trays with water). Alternatively, the silicone rubber coating can be removed by CO₂ blasting or sandblasting.

Properties

Color
Cured Properties
ValueUnitsTest Method / Conditions
Density (in water, at 23°C)1.08g/cm³DIN EN ISO 1183-1 A
Recommended Service Temperature-50 to 230°C
Elongation (at break)250%ISO 37 Type 1
Shore Hardness A32DIN ISO 48-4
Tear Strength5N/mmASTM D 624 B
Tensile Strength3N/mm²ISO 37 Type 1
Uncured Properties
ValueUnitsTest Method / Conditions
Curing Speed (at 23°C, 50% r.h)2mm/day
Density (at 23°C, 1013 hPa)1.12g/cm³DIN EN ISO 2811-2
Dynamic Viscosity (at 23°C, Brookfield, spindle 5, 2.5 rpm)approx. 75000 mPa·sDIN EN ISO 2555
Skin Formating Time (at 23°C, 50% r.h)8 - 12 minutes
Properties

Uncured

  • Flowable, self-leveling
  • Fast skin formation at room temperature
  • By-product of curing: acetic acid

Cured

  • Medium hardness
  • Designed for coating and potting applications
  • No inhibition of Pt curing silicones
  • Suitable for applications with food contact

Please Note : Fully cured ELASTOSIL® E60 N Gray is suitable for uses under the Recommendation "XV. Silicones" of the BfR and 21 CFR § 175.300 "Resinous and polymeric coatings" and FDA 21 CFR §177.2600 "Rubber articles intended for repeated use", provided that any given limitations on extractable and volatile substances are observed. Residual solvents have to be completely removed from the food contact article.

Note

Curing Conditions : 14 days at 23°C and 50 % relative humidity, 2 mm sheet, no post-curing.

Regulatory & Compliance

Safety & Health

Safety Notes

While curing ELASTOSIL® E60 N Gray releases a total of approx. 3.5 % by weight of acetic acid. These vapors should not be inhaled for long periods or in high concentration. Work areas should therefore be well ventilated. Contact of the uncured silicone rubber with eyes and mucous membranes must be avoided as this can cause irritation. If, despite all protective measures, uncured silicone rubber comes into contact with the skin or eyes, irrigate the affected area immediately with copious amounts of water for several minutes. If the irritation continues, immediately seek medical advice.

Packaging & Availability

Country Availability
Regional Availability
  • Africa
  • Asia
  • Europe
  • Latin America
  • Middle East
  • North America
  • Oceania

Storage & Handling

Storage Information

Store in a dry and cool place.