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Silicone Pressure Sensitive Adhesive Coating and Curing

Group of three scientists working in the laboratory

Silicone Pressure Sensitive Adhesive Coating and Curing

Discover silicone solutions

Silicone pressure sensitive adhesives (PSAs) have stability and flexibility that is unmatched by organic PSAs. Discover why silicone PSAs can best meet your diverse application needs.

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	Silicone PSA		Organic PSA
Type (Cure/Material)	Addition	BPO	Acrylic	Rubber
Heat Resistance	200°C	200°C	150°C	100°C
Low Temp, Resistance	-50°C	-50°C	0°C	0°C
Weather Resistance	Excellent	Excellent	Good	Poor
Adhesion to PTFE	High	High	Poor	Poor
Adhesion to Si Rubber	Middle to High	High	Poor	Poor

_{*Comparison for reference only with typical material testing under specific conditions.}

Explore the potential

Gain insights into how our high-performance line of silicone pressure sensitive adhesives (PSAs) can be adapted to your needs and enhance your applications.

Substrates for Silicone PSAs:

Glass
Teflon film
Paper
Mylar PET film
Fabric
Kapton polyimide film
Plastics
Glass cloth
Silicone rubber
PTFE (polytetrafluoroethylene)
Silicone-varnished cloth
FEP (fluorinated ethylene propylene)
Silicone/glass laminates
Aluminum foil
Polyester
Stainless steel

Key curing considerations

Whatever your application needs are, Dow’s globally trusted pressure sensitive adhesives (PSAs) will help you achieve your most challenging design goals. Read more to discover which cure system will provide you with the best results.

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	Peroxide Cure	Platinum Cure
Curing Temperature	High Temperatures	Low Temperatures
High Temperature Properties	Very Good	Good
Track and Adhesion	Good	Superior
Priming	Recommended	Not Required
Properties Formulation and Condition Dependency	Both	Poor
Easily Poisoned	No	Yes

PLATINUM CURE
PEROXIDE CURE
SOLVANT REMOVAL
OVEN DUSTING
ANCHORAGE

Clear, uncured liquid silicone rubber (LSR) is poured from a container. Product promotion / Materials News

Requires the addition of a platinum catalyst to develop PSA properties
Coating bath should be used within six hours of catalyst addition
Adhesives can be cured in vented, continuous coating ovens at low temperatures (80°C, 176°F)
On flexible substrates, typical cure speeds range from 1 minute at 125°C (257°F) to 2 minutes at 100°C (212°F)
Changing the catalyst level has little impact on the tack, adhesion or cohesive strength of the cured adhesive

Glass eyedropper dispenses silicone antifoam into a foam covered liquid. The liquid is red. Reference AV03988 Edited by AGP For use on Dow Corning 102F additives website. "Power up your coatings with effective foam control."

A benzoyl peroxide catalyst is typically used to develop PSA properties
Most consistent results are achieved by using 98% benzoyl peroxide; and a complete blending of peroxide and adhesive is best obtained through a 10% solution of peroxide in toluene
Coating bath should be used a day after mixing, as peroxide loses its activity quite rapidly in solvent
Peroxide concentration can be varied from 0.5% to 3.0% (based on adhesive solids)
Increasing peroxide concentration will decrease tack and adhesive strength, but increase cohesive strength of the cured coating
Mixing is necessary to achieve uniform results in the finished product
Curing the adhesive is a two-step process that requires the use of graded temperatures

Close up of laboratory flasks containing blue colored liquid. / Dreamstime Image #3755928

To ensure proper curing, solvent removal is need after applying the adhesive to the backing material
Recommended temperatures range from 65°C to 93°C (150 to 200°F)
Higher removal temperatures can cause the peroxide to decompose and crosslink the solvent into the adhesive
After the solvent is removed, a tacky, uniform film of adhesive is left on the backing
Heat curing can further strengthen the film’s adhesiveness and cohesiveness
The amount of cure depends on several factors, including the type of catalyst, equipment and backing material

Recycled paper background; Shutterstock ID 126214400; PO: redownload; Job: redownload; Client: redownload; Other: redownload

The evaporation of volatile silicone in the curing oven can cause the formation of oven dust
- Two possible ways to reduce this problem: Select a silicone PSA with lower volatile silicone conten
- Use ramped oven zones (oven zones with temperatures that get progressively hotter)

This is an updated version of AV13259. Kevin Houle and Dave Dobson applying sealant for solar rail bonding at the Freeland Solar Application Center.

For the manufacture of self-wound tapes or laminate constructions with backings such as polyester, Kapton®, Teflon® and other plastic films, the use of a primer may be required to improve anchorage of the cured adhesive to the backing
Good anchorage reduces the possibility of adhesive transfer during unwind and ensures clean slitting operations and clean removability following masking

Pressure-sensitive adhesive (PSA)-coated tapes and films on a white background. Pressure-sensitive adhesives (PSA) Fluids and Emulsions/IBU C

Choose Dow silicones comprehensive PSA offering for high performance

Discover our PSAs can help you achieve your most challenging design goals.

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Speak to an expert

We are committed to connecting you with experts and resources to tackle any challenge.

Silicone Pressure Sensitive Adhesive Coating and Curing

Silicone Pressure Sensitive Adhesive Coating and Curing

Discover silicone solutions

Explore the potential

Substrates for Silicone PSAs:

Key curing considerations

Choose Dow silicones comprehensive PSA offering for high performance

Speak to an expert

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