ELASTOSIL^® SOLAR 3210 A/B

Important!

Only A and B components with the same batch number should be processed together!

Surface preparation:

All surfaces must be clean and free of contaminants that will inhibit the cure of ELASTOSIL® SOLAR 3210 A/B. Examples of inhibiting contaminants are sulfur containing materials, plasticizers, urethanes, amine containing materials and organometallic compounds – especially organotin compounds. If a substrate’s ability to inhibit cure is unknown, a small scale test should be run to determine compatibility.

Mixing:

Caution! Component A of ELASTOSIL® SOLAR 3210 A/B contains the platinum catalyst, component B the crosslinker. Since even small quantities of crosslinker may cause gelling of component A, all tools (e.g. spatula, stirrers, mixing cups etc.) used for handling either component B or the A/B mix must not come into contact with component A by mistake.

The two components should be thoroughly mixed at a 9 : 1 ratio by weight or volume, either manually or by automatic metering lines equipped with static or dynamic mixing devices.

Material application:

To eliminate any air introduced during dispensing or trapped under components or devices a vacuum encapsulation is recommended. Alternatively, component A and B can be deaerated individually prior to use to remove absorbed air; applying a vacuum of 25-50 mbar for 10-15 min is recommended.

Curing:

The curing time of addition-curing silicone rubber is highly dependent on temperature and both the size and the heat sink properties of the substrates used. ELASTOSIL® SOLAR 3210 A/B cures both at room temperature and under heat. General information about pot life, typical curing temperatures and resulting curing times are given in the table "Properties Catalyzed A+B".

The reactivity of ELASTOSIL® SOLAR 3210 A/B can be adjusted within wide limits by adding WACKER® Catalyst EP or WACKER® Inhibitor PT 88 to suit the processing requirements of the particular application. WACKER® Catalyst EP increases reactivity, i. e. pot life and curing time are reduced. WACKER® Inhibitor PT 88 is a pot life extender and thus prolongs pot life and curing time.

Pigmentation:

ELASTOSIL® SOLAR 3210 A/B is colourless, transparent and crystal clear. If necessary, the product can be pigmented by adding up to 2 wt. % of ELASTOSIL® COLOR PASTE FL.

Detailed information about processing, modifying curing speed and pigmentation is given in our brochure “ROOM TEMPERATURE VULCANIZING (RTV) SILICONES - MATERIAL AND PROCESSING GUIDELINES”. We recommend running preliminary tests to optimize conditions for the particular application.

Removal:

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