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Description for Dow HM-2500
One-part, RTV silicone sealant, low odor, neutral cure, will not corrode substrates, instant adhesion with a high green strength, cures to a tough rubbery solid.Application Type Bond, Seal 1 Part or 2 Part 1-Part Material Form Bulk Industry Smart Meters Manufacturer Dow Chemistry Silicone-based Hotmelt, Silicone-based Hotmelt Cure Method RTV Application Temperature (°F) 248 Cure Time (min) 2,880 Viscosity (cPs) High, 210,000, NonFlow Color Ultra clear High Temperature Resistance (°C) 93 Low Temperature Resistance (°C) -32 -
Technical Data for Dow HM-2500
Overview
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1 Part or 2 Part
- 1-Part
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Material Form
- Bulk
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Industry
- Smart Meters
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Application Method
- Contact
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Cure Method
- RTV (Room Temperature Vulcanization) - RTV
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Color
- Clear / Transparent - Ultra clear
Specifications
Cure Specs
Application Temperature (°F) 248 Cure Time (min) 2,880 Test Method Viscosity (cPs) High, 210,000, NonFlow Test Method Work / Pot Time (min) Long, <1,440 Test Method Open Time (min) 15 Bond Strength
Green Strength (psi) 3,600, High, 900, Instant, Quick, 18 to 28 Tensile Strength (psi) 350 Test Method Material Resistance
High Temperature Resistance (°C) 93 Low Temperature Resistance (°C) -32 Hardness
Shore A Hardness 60 Test Method Elongation (%) 10 Test Method Flexibility Flexible Other Properties
Specific Gravity 1.060 Test Method % Solids (%) >99 Test Method Business Information
Shelf Life Details When stored at or below 90°F (32°C) in the original unopened containers, this product has a usable life of 12 months from the date of production. Refer to product packaging for “Use by Date” Shelf Life Temperature (°F) <90 Shelf Life Type from the date of production Shelf Life (mon) 12 Not Good For
Don't Use With surface that might bleed oils, plasticizers, solvents -
Best Practices for Dow HM-2500
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Surface Preparation
Surfaces should be clean and dry before sealant application.
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Application
Dow Corning? HM-2500 Assembly Sealant is from 5 gallon pails or 55 gallon drums with a platen-type hotmelt pump. Application temperature is typically 250° F (120° C). When the melt temperature has been reached, application with automated or hand-assisted dispensing equipment can begin. Once applied to the substrate the parts should be assembled with 15 minutes. Once applied, this product reacts with the atmospheric moisture to form a weather resistant, flexible, silicone sealant. Exposure of opened containers with air should be minimized.
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Cure Time Test Methods
Cure Time | Test Method |
---|---|
2,880 min | 1/8" bead |
Viscosity Test Methods
Viscosity | Test Method | Temperature |
---|---|---|
High | 20 to 25°C | |
210,000 cPs | CTM 0719 | 120°C |
NonFlow |
Work / Pot Time Test Methods
Work / Pot Time | Test Method |
---|---|
Long | |
<1,440 min |
Tensile Strength Test Methods
Tensile Strength | Test Method |
---|---|
350 psi | ASTM D412 |
Elongation Test Methods
Elongation | Test Method |
---|---|
10 % | ASTM D412 |
Shore A Hardness Test Methods
Shore A Hardness | Shore Hardness Test Method |
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60 | ASTM C661 |
% Solids Test Methods
% Solids | Test Method |
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>99 % | CTM 0086 |
Specific Gravity Test Methods
Specific Gravity | Test Method |
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1.060 | CTM 0044 |