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Protective Coatings

Strain gage performance is easily degraded by the effects of moisture, chemical attack, or mechanical damage. Micro-Measurements coating compounds are formulated specifically for use in protecting strain gage installations from damaging environmental conditions. The range of materials is adequate for handling the majority of gage protection requirements. Refer to the Coatings Selection Guide.
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General-purpose coating in laboratory and field. Elevated-temperture use.
Thicker than 3140 RTV. Good cable anchor.
Butyl rubber patch. No curing required.
Pre-softened wax with paste consistency. Similar to W1.
Solvent-thinned (toluene) synthetic resin. Often used as a precoat for Gagekote #5, and Epoxylite #813. Resistant to moisture and offers a wide operating temperature range. Provides limited mechanical protection. Convenient to use.
Moisture protection for ceramic cement installations.
Two component polysulfide. Good mechanical protection and chemical resistance.
Fast drying acrylic of used for leadwire anchoring in transducers.
Adhesive used as a protective coating - Provides excellent chemical, electrical, and mechanical properties when fully cured. Film is hard, with high heat distortion temperature. Excellent in transducer service.
Two-component 100%-solids epoxy systems. Primarily used as an adhesive. Often used as protective coatings because of low vapor-transmission rate. AE-15 is superior but requires heat cure. Single coating thickness 0.005-0.015in (0.1–0.4mm).
Two-component 100%-solids, elevated-temperaturecuring epoxy system. Very high viscosity. Generally applied with a spatula, and can be contoured to the surface. Coating thickness 0.005−0.03 in (0.1−0.75 mm)
General-purpose laboratory coating.
Secondary coating as vapor barrier.
Low reinforcement coating. Elevated temperature use.
General-pupose laboratory moisture barrier. Intrabridge wiring anchor and insulation.
Field applications where conditions are not ideal. No curing required.
Low reinforcement coating for commercial transducers.
General-purpose coating. Good protection against oil, grease, most acids and alkalies, and most solvents.
Best water barrier, but poor mechanical protection.