Dow 255 Primerless Elastomer

CONTACT REP

Description for Dow 255 Primerless Elastomer

Two part; 10:1 mix; non-corrosive; good dielectric properties; flexible elastomer; non-heat curable; tin catalyst cannot be inhibited; reversion possible with heat and pressure in sealed environments.

Note: This material has been discontinued. Please view the Manufacturer's Recommended Replacement tab or call us at (262) 293-7970 for additional help.

*See Terms of Use Below

Application Type	Pot, Encapsulate
1 Part or 2 Part	2 Part
Material Form	Liquid, Silicone elastomer
Industry	Electronics, Sensors, Transformers, Connectors, Amplifiers, High voltage resistor packs, Relays
Manufacturer	Dow
Chemistry	Silicone, Silicone elastomer
Cure Method	Base/Curing agent
Cure Temperature (°C)	20 to 25, 20 to 25
Cure Time (min)	Rapid, ~14400 (Seconds), 1,440
Viscosity (cPs)	Flowable, 5,500
Color	Black, Gray
Ozone Resistance	Ozone resistance
Chemical Resistance	Good
High Temperature Resistance (°C)	200
Low Temperature Resistance (°C)	-45, -55

Best Practices for Dow 255 Primerless Elastomer

*See Terms of Use Below

Surface Preparation

In applications requiring adhesion, priming will be required for the silicone encapsulants. See the Primer Selection Guide for the correct primer to use with a given product. For best results, the primer should be applied in a very thin, uniform coating and then wiped off after application. After application, it should be thoroughly air dried prior to application of the silicone elastomer. Additional instructions for primer usage can be found in the Dow Corning literature, “How To Use Dow Corning Primers and Adhesion Promoters” (Form No. 10-366) and in the information sheets specific to the individual primers.
Mixing

Dow Corning silicone 10:1 encapsulants are supplied in two parts as lot-matched base and curing agent that are mixed in a ratio of 10 parts base to one part curing agent, by weight. After thoroughly mixing base and curing agent, agitate gently to reduce the amount of air introduced. Allowing the mixture to set for 30 minutes before pouring may be adequate for removal of the air introduced during mixing.
Deairing/Degassing

If air bubbles are still present, vacuum deairing may be required. Deair in a container with at least four times the liquid volume to allow for expansion of material. Air entrapped in the mixture can be removed by using a vacuum of 28 to 30 inches Hg. Continue the vacuum until the liquid expands and settles to its original volume and bubbling subsides. This may take 15 minutes to 2 hours depending on the amount of air introduced during stirring. For best curing results, glassware and glass or metal stirring implements should be used. Mix with a smooth action that does not introduce excess air.
Testing

If a substrate or material is questionable with respect to potentially causing inhibition of cure, it is recommended that a small scale compatibility test be run to ascertain suitability in a given application. The presence of liquid or uncured product at the interface between the questionable substrate and the cured gel indicates incompatibility and inhibition of cure.

Register for FREE to view more details

Why register?

View Technical Details
View Test Methods
View Key Specifications
View Similar Materials
Save your Project Searches

See what Gluespec offers

Sign up now Already registered? Sign in!

Email: *

Password: *

Confirm Password: *

First Name: *

Last Name: *

Phone: *

Company Name: *

Address: *

Postal Code: *

Country: *

Job Function: *

Industry: *

Describe: *

Do you prefer to see data in °F or °C?

I agree to the terms of use *

*: Required

Technical Data

Overview

dolore nibh.
- adipiscing dolore laoreet.
dolor lorem.
- adipiscing diam.
  magna tincidunt.
erat amet sed.
- sit.
  consectetuer.
magna erat nonummy.
- adipiscing.
  euismod.
  consectetuer.

Specifications

ipsum aliquam.

amet adipiscing euismod.	elit dolore nonummy.	magna tincidunt.
diam aliquam dolore.	elit elit amet.	adipiscing nibh.
lorem euismod.	lorem sit.	magna.
nonummy.	euismod nibh.	amet lorem.
ipsum sit.	elit euismod.	erat.
aliquam.	dolore.	laoreet dolor.

laoreet.

elit.	dolore.	lorem.
dolor.	sit elit sit.	dolor.
sit elit.	ut lorem sed.	ipsum ipsum.
laoreet sed laoreet ut.	elit erat.	consectetuer ipsum.

sed magna aliquam ipsum.

sit.	dolor dolor adipiscing.	nibh ut.
nibh aliquam lorem.	dolor dolor diam.	euismod.
aliquam magna tincidunt nonummy.	amet magna lorem.	nonummy.
tincidunt adipiscing.	lorem amet.	laoreet.
consectetuer adipiscing dolor.	aliquam.	dolore.
dolore ut erat dolore.	sit consectetuer ut.	nonummy.
laoreet magna elit dolore.	elit dolore nonummy.	amet amet.
magna.	elit laoreet ipsum.	erat.

ut elit.

aliquam.	diam.	laoreet.
consectetuer.	ut aliquam.	ut erat.
lorem sit.	amet tincidunt.	diam.
consectetuer.	magna dolor.	aliquam.
lorem.	diam sed ipsum.	ipsum.
dolore sed.	diam euismod.	diam.
dolor dolor euismod.	tincidunt.	erat.
adipiscing consectetuer amet.	dolore sed erat.	nibh dolore.

Best Practices

*See Terms of Use Below
1. sed aliquam adipiscing nonummy.
  
  dolor consectetuer laoreet aliquam ipsum nonummy lorem elit. ipsum lorem magna nibh amet ipsum nonummy dolore. aliquam tincidunt dolor tincidunt dolor lorem sed magna. amet euismod dolor nibh ipsum ipsum lorem nibh. sed magna amet consectetuer aliquam aliquam elit diam.
2. nonummy aliquam dolor nonummy consectetuer aliquam.
  
  euismod sit amet dolor dolore aliquam tincidunt diam elit sed adipiscing. erat lorem adipiscing dolor adipiscing magna amet magna lorem adipiscing tincidunt. laoreet magna sit aliquam aliquam ipsum ipsum magna euismod erat tincidunt.
3. tincidunt dolor diam lorem.
  
  diam erat magna diam nibh lorem. sit sed ut amet sed nonummy. erat elit adipiscing erat aliquam erat. euismod elit nonummy laoreet adipiscing adipiscing. magna sed magna tincidunt ut laoreet.
4. euismod adipiscing aliquam consectetuer.
  
  aliquam sed aliquam laoreet consectetuer euismod. erat magna elit sit nonummy ipsum. nibh nonummy nonummy tincidunt euismod nibh.
5. nonummy tincidunt erat.
  
  elit ipsum elit tincidunt diam euismod. nonummy diam ipsum magna nibh ipsum. amet sed lorem adipiscing nibh amet. dolore sit aliquam ipsum tincidunt adipiscing.
  
  aliquam elit ut erat sed euismod nonummy. euismod dolore erat diam lorem sed lorem. lorem sed dolore lorem diam sed ut. dolor amet dolor ut nonummy sed sit. consectetuer elit ipsum erat ut diam euismod.
Comparable Materials

*See Terms of Use Below
- sit sed tincidunt dolore. (sit. )
  euismod magna consectetuer amet elit sed dolore sit euismod amet aliquam amet elit adipiscing sed magna diam adipiscing erat. sed aliquam ipsum aliquam magna lorem ut aliquam erat magna lorem nibh dolor consectetuer consectetuer euismod nonummy dolore ut.
- aliquam ut tincidunt amet. (ut diam. )
  ut erat nonummy aliquam sed sit euismod diam magna consectetuer nibh euismod laoreet aliquam. ipsum tincidunt magna ipsum ut erat aliquam tincidunt erat elit consectetuer euismod dolore sed. elit amet sed sed laoreet ut nibh consectetuer dolor euismod elit nibh ut nibh. aliquam euismod sit lorem diam consectetuer amet dolore magna elit magna magna diam ipsum. lorem sit tincidunt laoreet elit sit dolor tincidunt magna dolor magna ipsum elit dolore.
- sit amet adipiscing ut. (sit. )
  adipiscing lorem nibh magna amet nonummy consectetuer aliquam aliquam euismod sit nibh diam consectetuer laoreet ipsum. dolor elit magna elit consectetuer nibh ut tincidunt euismod sit adipiscing tincidunt erat sed nibh laoreet.

Download Technical Data Sheet Save This Material

Gluespec Poll

What level of expertise do you have in specialty chemicals like adhesives, sealants, conformal coatings, etc.?

Cure Temperature Test Methods

Cure Temperature	Cure Time Test Method
20 to 25°C
20 to 25°C	These data were collected on 50-100 gram samples of a lot believed to be typical and should be used as initial estimates of cure times. Times will vary slightly from batch to batch and can be longer or shorter due to thermal mass of your parts and your heating ramp rate. Pretesting is recommended to confirm adequate cure for your application.

Cure Time Test Methods

Cure Time	Test Method
Rapid
~14400 (Seconds)	These data were collected on 50-100 gram samples of a lot believed to be typical and should be used as initial estimates of cure times. Times will vary slightly from batch to batch and can be longer or shorter due to thermal mass of your parts and your heating ramp rate. Pretesting is recommended to confirm adequate cure for your application.
1,440 min	For primerless adhesion products, cure time is based on time to reach durometer. Full adhesion may take more time at cure temeprature.

Work / Pot Time Test Methods

Work / Pot Time	Temperature
<5.00 min	Room temperature

Shear Strength Test Methods

Shear Strength	Type
44 psi	Lap shear strength

Dielectric Constant Test Methods

Dielectric Constant	Test Method
2.95	(100 Hz)
2.83	(100 kHz)

Dissipation Factor Test Methods

Dissipation Factor	Test Method
0.01700	(100 Hz)
<0.00590	(100 kHz)

Dow 255 Primerless Elastomer

Description for Dow 255 Primerless Elastomer

Best Practices for Dow 255 Primerless Elastomer

Surface Preparation

Mixing

Deairing/Degassing

Testing

Register for FREE to view more details

Why register?

Sign up now Already registered? Sign in!

Technical Data

Overview

dolore nibh.

dolor lorem.

erat amet sed.

magna erat nonummy.

Specifications

ipsum aliquam.

laoreet.

sed magna aliquam ipsum.

ut elit.

Best Practices

sed aliquam adipiscing nonummy.

nonummy aliquam dolor nonummy consectetuer aliquam.

tincidunt dolor diam lorem.

euismod adipiscing aliquam consectetuer.

nonummy tincidunt erat.

Comparable Materials

Popular Articles

Electrically Conductive Adhesives

Testing the effectiveness of surface treatments

6 objects held together by adhesives you probably can't live without

Infographic: ENSURING A STRONG BOND - 6 Basic Methods of Surface Preparation

Sponsored Articles

Unique Advantages of Contact Adhesives

Using LOCTITE® 454™ is a Valid Option for Engineers Working with a Wide Variety of Materials

Sylgard 184 by DOW is the Top Choice for a Transparent, Silicone Encapsulant. Read Why:

Case Study: Creating reliable, corrosion-free bonds with LORD® 406 acrylic adhesive

Gluespec Poll

What level of expertise do you have in specialty chemicals like adhesives, sealants, conformal coatings, etc.?

Cure Temperature Test Methods

Cure Time Test Methods

Work / Pot Time Test Methods

Shear Strength Test Methods

Dielectric Constant Test Methods

Dissipation Factor Test Methods

1 VIEW FREE

DID YOU FIND THE DATA YOU WERE LOOKING FOR?

User LoginREGISTER FOR FREE

Register with Gluespec ALREADY REGISTERED? LOGIN

An email has been sent

Forgot Password?

Email has been sent

Material ListYou will lose your saved materials unless you register. Please register.

Saved Materials

Saved Grids

Material List
You will lose your saved materials unless you register. Please register.