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BLUESIL ESA 7244 B
Hot-curing 2K-Pt silicone adhesive for automotive cylinder head gaskets and engine insulation.
Hot-curing 2K Pt silicone adhesive (Shore A 50, heat curing) for automotive cylinder head gaskets, engine insulation and screen-printed seals
Documents
Internal reference:
40-944
HS code:
39100000
Rhodorsil ESA 7244 A & B is a heat-curing 2K Pt silicone adhesive (Shore A 50, heat cross-linking) for automotive cylinder head gaskets, engine insulation and screen printing gaskets.
This product line comprises heat-curing 2K polyaddition silicone elastomers for high-throughput industrial production — long pot life at room temperature, rapid curing at 100–200 °C. ESA 7244 is tailored to specific industrial applications — the most important properties and areas of application are listed below.
Rhodorsil ESA 7244 is a heat-curing potting compound — fully cured in minutes at 100–200 °C (e.g., 10 min at 150 °C), with a long pot life at room temperature (16 hrs). Ideal for high-throughput industrial production with cylinder head gaskets, engine insulation, and screen printing applications.
What distinguishes ESA 7244
What is ESA 7244 used for?
processing
Recommended accessories
Important instructions
ESA 7244 compared to related RTV products
Networking system, mechanics, and processing times side by side — all values from the official Elkem TDS. “— " = not specified in the datasheet.
ESA 7244 Current product |
ESA 6110 → | ESA 7250 → | ESA 7252 → | |
|---|---|---|---|---|
| Networking system | 2K polyaddition (Pt) hot-curing | 2K Polyaddition (Pt) Gel | 2K Polyaddition (Pt) | 2K Polyaddition (Pt) |
| Mixing ratio | 1 : 1 | 1 : 1 | 10 : 1 | 1 : 1 |
| Color | Beige (A) / blue (B) | Visually clear | Optically clear, colorless | Black (A) / white (B) |
| Shore A hardness | A 50 | Gel (Penetration 250) | A 52 | A 48 |
| Elongation at break | >160 % | — | 115 % | 170 % |
| Tensile strength | 5.5 MPa | — | 6.2 MPa | 2.3 MPa |
| Tear resistance | — | — | 4 kN/m | — |
| Potting time | 16 h @ 23 °C | 50 min (Std) / 5 min (QC) | 4 h | 1.5 h |
| demolding time | 10 min @ 150 °C | 120–180 min | 24–48 h | 8 h (RT) / 5 min @ 150 °C |
| Mixed viscosity | 60,000 mPa·s | 1,200 mPa·s | 4,000 mPa·s | 3,000–3,500 mPa·s |
| Main application | Cylinder head gaskets (screen printing) | Electronic encapsulation (potting) | Electronic potting | Aerospace fire protection |
Technical data for BLUESIL ESA 7244 B
| Product information | |
|---|---|
| brand | Bluesil |
| Manufacturer | Elkem Silicones |
| Networking type | Addition (Platinum) |
| Number of components | 2K (two-component) |
| consistency | Flowable |
| Mixing ratio | 1:1 |
| Container | 1 kg, 2.5 kg, 5 kg, 25 kg |
| Other features | |
|---|---|
| UV resistance | Yes |
| Physical properties | |
|---|---|
| Paint has hardened | Transparent |
| Self-leveling | Yes |
| Viscosity uncrosslinked (mPa·s) | 100 |
| Electrical properties | |
|---|---|
| Electrical insulation | Yes |
| Curing values | |
|---|---|
| Potting time (min) | 16 |
| Product approvals | |
|---|---|
| Food contact | No |
| Suitable for medical use | No |
| Mechanical properties | |
|---|---|
| Tensile strength (MPa) | 5.5 |
| Elongation at break (%) | 160 |
For binding values, please refer to the technical data sheet (TDS) in the "Documents" tab.
Documents and datasheets
Click on a document for a preview or the download icon for a direct download.
Technical Data Sheets (TDS) 3
Frequently asked questions about ESA 7244
Practical questions regarding processing and design — answered by SILITECH.
Rhodorsil ESA 7244 A & B: Hot-curing 2-component platinum silicone adhesive (Shore A 50, heat-curing) for automotive cylinder head gaskets, engine insulation, and screen-printed gaskets. Main applications include cylinder head gaskets (screen printing), electric motor insulation, and starter and generator insulation.
Polyaddition crosslinking is a two-component silicone chemistry using a platinum catalyst. Component A contains the platinum complex, and component B contains the SiH crosslinker. When mixed, the components crosslink without releasing reaction byproducts—no shrinkage due to outgassing, excellent dimensional accuracy, and low linear shrinkage. Important: Polyaddition silicones are inhibited by various substances—sulfur-vulcanized natural rubbers, tin-catalyzed RTV silicones, amine-catalyzed epoxy resins, and tin-stabilized PVC. In case of doubt, a preliminary test should be carried out.
Thoroughly stir components A and B before each processing step. Measure precisely according to the mixing ratio specified in the TDS (see comparison table above) – ideally by weight. Mix with an electric or pneumatic agitator at low speed (minimize air entrainment). Degas the mixture under vacuum (30–50 mbar) – the material will expand 3–4 times its original volume, bubbles will escape, and the material will settle back after 5–10 minutes. Then slowly pour into the mold from the lowest point to avoid air entrapment. For polyaddition systems, avoid contact with inhibitors (sulfur-based rubber, tin-based RTV, amine epoxides, PVC with tin salts).
Store in the unopened original container in a dry, cool place — typically between +5 and +30 °C, see TDS for exact values. Store components A and B separately; seal airtight after opening. Polyaddition systems are insensitive to moisture, but should be stored in a cool place to maintain pot life. Consult the Safety Data Sheet (SDS) before use.
The comparison table above lists related RTV products with different hardnesses, pot lives, or application profiles. If you are unsure which product is best for you, we would be happy to advise you — contact SILITECH with details of your application (substrate, desired hardness, processing time, mechanical requirements, and durability).
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Product specifications
| Product information | |
|---|---|
| Container | 1kg or 2.5kg or 5kg or 25kg |
| brand | Bluesil |
| Manufacturer | Elkem Silicones |
| Networking type | Addition (Platinum) |
| Number of components | 2K (two-component) |
| consistency | Flowable |
| Mixing ratio | 1:1 |
| Other features | |
|---|---|
| UV resistance | Yes |
| Physical properties | |
|---|---|
| Paint has hardened | Transparent |
| Self-leveling | Yes |
| Viscosity uncrosslinked (mPa·s) | 100 |
| Electrical properties | |
|---|---|
| Electrical insulation | Yes |
| Curing values | |
|---|---|
| Potting time (min) | 16 |
| Product approvals | |
|---|---|
| Food contact | No |
| Suitable for medical use | No |
| Mechanical properties | |
|---|---|
| Tensile strength (MPa) | 5.5 |
| Elongation at break (%) | 160 |
| Keywords | |
|---|---|
| Keywords | |
| processing | |
|---|---|
| Viscosity of mixture | 1,200 mPa·s |
| Viscosity Comp. A | 1,000 mPa·s |
| Viscosity Comp. B | 1,200 mPa·s |
| Pot life at 23°C | 45.0 min |
| Physical & Thermal | |
|---|---|
| Density (23°C) | 0.98 g/cm³ |
| Temperature resistance (duration) | -50 to 200 °C |
| Peak temperature (short-term) | 200 °C |
| Electrical characteristics | |
|---|---|
| Dielectric constant ε (1 kHz) | 2.8 |
| Dielectric strength | 23.0 kV/mm |
| Contact resistance | 1e+15 Ω·cm |
| Loss factor tan δ | 0.001 |
| storage | |
|---|---|
| Shelf life in original packaging | 12 months |
| Storage temperature | -10 to 30 °C |
Documents and datasheets
Safety Data Sheets (SDS) and Technical Data Sheets (TDS) are available for download:
- Bluesil ESA 7244 B - Fiche Technique FR.pdf (189 KB)
- Bluesil ESA 7244 B - Fiche de Sécurité FR.pdf (568 KB)
- Bluesil ESA 7244 B - Scheda di Sicurezza IT.pdf (558 KB)
- Bluesil ESA 7244 B - Safety Data Sheet DE.pdf (361 KB)
- Bluesil ESA 7244 B - Technical Data Sheet EN.pdf (683 KB)
- Bluesil ESA 7244 B - Technical Data Sheet DE.pdf (56 KB)