Dow HM-2500

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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.

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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

Best Practices for Dow HM-2500

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Technical Data for Dow HM-2500

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Overview

Application Type
- Adhesive - Bond
- Sealant - Seal
1 Part or 2 Part
- 1-Part
Material Form
- Bulk
Industry
- Smart Meters
Chemistry
- Hot melt - Silicone-based Hotmelt
- Silicone - Silicone-based Hotmelt
Application Method
- Contact
Cure Method
- RTV (Room Temperature Vulcanization) - RTV
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

*See Terms of Use Below
1. Surface Preparation
  
  Surfaces should be clean and dry before sealant application.
2. 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.
Comparable Materials for Dow HM-2500

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Spec Engine^® Results
- Dowsil IA-1200 Hotmelt RTV Sealant(Dow)
  It is designed for use as a primerless bonding and/or sealing solution in lighting assembly applications. Hot melt technology is used to dispense the adhesive either by automation or manual methods.
- 3-0400 Automotive Assembly Sealant(Dow)
  Reactive hot-melt neutral cure RTV for automotive component assembly applications.
- Dowsil HM-2600 Silicone Assembly Sealant(Dow)
  • One-component • Neutral-cure • Silicone hot-melt adhesive • For assembly applications • Non-hazardous composition • Long open/working time • Recognized by UL for 94 HB Flame Rating (File QMFZ2) • FDA Regulations 21 CFR 177.2600 for aqueous applications.
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