FAQs
What is SYLGARD 186 used for?
It is a two-part silicone elastomer used as a flexible protective coating and encapsulant for electrical assemblies, including power supplies, transformers, sensors, amplifiers, and connectors. Its high tear strength and flexibility make cured parts durable, and it is also used to form elastic substrates in flexible-electronics research.
What is special about its tear strength?
SYLGARD 186 is noted for high tear strength, which makes the cured elastomer resistant to tearing and mechanical damage. That toughness suits protective coatings and molds that must flex, stretch, or be handled repeatedly without failing, giving longer service life in demanding electrical and mechanical applications.
How is it mixed and cured?
It uses a 10:1 mix ratio and cures at room temperature or faster with heat, with cure controlled by temperature. Because it cures without exotherm at a constant rate regardless of thickness and needs no post-cure, parts can be placed in service immediately after completing the cure schedule.
Does the 10:1 ratio matter?
Yes. The 10:1 base-to-curing-agent ratio provides latitude to tune the cured material's modulus and hardness for specific applications and production lines. Accurate measurement of components helps ensure consistent, repeatable mechanical properties, so careful proportioning is important for reliable results across successive mixes.
Is SYLGARD 186 UL recognized?
It is UL-tested and can be considered for uses that require UL compliance. Independent distributor data lists a UL 94 V-1 flammability rating and UL 746C recognition. Because agency listings vary by grade and can change, users needing formal certification should confirm the current UL listing for their specific product.
