Remix each of the 2 components (A and B part) every time before using. Mix Part A and Part B components according to recommended weight ratios.
The two components are thoroughly mixed using an electrical or pneumatic mixer, on a low speed setting so as to limit the inclusion of air in the mixture. A dispensing machine can also be used. The mixing can be made with a dynamic mixing head or a static mixer.
The mixture of the two components should be degassed to remove air bubbles which would reduce the mechanical and dielectric properties. Degassing is generally performed in a vaccum of 30 to 50 mbars for about ten minutes, releasing the vacuum twice in the chamber.
BLUESIL ESA 7252 A&B can be poured on to metals, glass, laminates or moulded articles containing organic resins or silicones, or on all other materials. It is recommended to pour slowly the degassed BLUESIL ESA 7252 A&B mixture at the lowest point of the volume to be filled, to prevent the formation and entrapment of air bubbles. The container should not be filled completely, to allow the BLUESIL ESA 7252 A&B to expand at service temperatures.
At a temperature of 23°C, BLUESIL ESA 7252 A&B cures in approximately 8 hours. Curing can be accelerated by external heat, and the higher the temperature the faster curing will be. For example, at 150°C the product cures in about 5 minutes.
Certain materials that the BLUESIL ESA 7252 A&B may be in contact with when curing could inhibit the reaction. Especially troublesome materials are: sulphur-containing cured natural and synthetic rubber compounds (neoprene, latex, SBR), tin catalyzed silicone rubbers, amine catalyzed epoxies, PVC stabilized with tin salts and some polyurethane elastomers.
An object encapsulated with BLUESIL ESA 7252 A&B can be repaired simply by cutting away the ESA and replacing the missing elastomer with new BLUESIL ESA 7252 A&B, which adheres very strongly to itself with no need for a primer.
|STORAGE -5°C ||No special storage precautions noted. Material is stable under normal conditions. Avoid contact with oxidizing agents. Suitable containers: polyethylene. Plastic lined steel drum.||Please consult the Safety Data Sheet of this product.||ELV;RoHS;WEEE|
BLUESIL ESA 7252 A
BLUESIL ESA 7252 A&B is a two-component silicone elastomer which cures at room temperature by a polyaddition reaction. The curing can be accelerated by heating.
BLUESIL ESA 7252 A&B is supplied in the form of a viscous liquid which is transformed, after mixing parts A and B and then curing, into a strong, elastic material.
2 Part RTV
- Outstanding flame resistance.
- Good thermal conductivity: dissipation of calories (encapsulation).
- Low viscosity (easily refilled).
- Fast curing product.
- Non corrosive.
- Potting: protection of electrical component, connection box.
- Encapsulating: connectors, captors, sensors in on board electronic.
- Thermal and fire protection in aerospace.
Asia Pacific;Europe Middle East Africa;Central and South America;North America
|For information about Storage and Shelf Life for this product, please download the Technical Data Sheet.|