Polysil™ SA 1911
Polysil™ SA 1911 is a differential double-coated adhesive tape engineered for bonding dissimilar materials, with 2.8 mils of silicone PSA on one face and 2.2 mils of acrylic PSA on the other, separated by a 0.5 mil PET carrier for a total thickness of 5.5 mils. The silicone face delivers 72 oz/in peel adhesion and is specifically formulated for strong bonding to silicone foams, rubber, and other low surface energy substrates. The acrylic face delivers 70 oz/in peel adhesion with excellent heated shear performance, spanning a service temperature range of −40°F to 300°F.
Key Properties
- Peel Adhesion, Silicone Side: 72 oz/in (PSTC-101)
- Peel Adhesion, Acrylic Side: 70 oz/in (PSTC-101)
- Shear Adhesion @ 2.2 PSI, Both Sides: >168 hours (PSTC-107)
- Maximum Service Temperature: 300°F
- Tensile Strength: 15 lb/in (PSTC-131)
- Total Thickness: 5.5 mils (PSTC-133)
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Adhesive Thickness, Acrylic Side | 2.2 mils | PSTC-133 |
| Adhesive Thickness, Silicone Side | 2.8 mils | PSTC-133 |
| Carrier Thickness | 0.5 mils | — |
| Total Thickness | 5.5 mils | PSTC-133 |
| Adhesive Type | Silicone & Acrylic | — |
| Adhesive System | Permanent Adhesive | — |
| Adhesive Side | Double Sided Adhesive | — |
| Adhesive Backing / Carrier | PET | — |
| Color | Clear | — |
| Liner | Kraft (White) | — |
Mechanical Properties
| Property | Value | Test Method |
| Tensile Strength | 15 lb/in | PSTC-131 |
| Elongation | 110% | — |
Adhesion Properties
| Property | Value | Test Method |
| Peel Adhesion, Acrylic Side | 70 oz/in | PSTC-101 |
| Peel Adhesion, Silicone Side | 72 oz/in | PSTC-101 |
| Shear Adhesion @ 2.2 PSI, Acrylic Side | >168 hours | PSTC-107 |
| Shear Adhesion @ 2.2 PSI, Silicone Side | >168 hours | PSTC-107 |
| Tack, Acrylic Side | 42 oz | ASTM D2979 |
| Tack, Silicone Side | 38 oz | ASTM D2979 |
Thermal Properties
| Property | Value | Test Method |
| Minimum Service Temperature | −40°F | — |
| Maximum Service Temperature | 300°F | — |
- Bonding of silicone foam and silicone rubber components to non-silicone substrates including metals and rigid plastics
- Lamination of LSR (liquid silicone rubber) parts to conventional carrier materials
- Dissimilar-material dual-surface bonding where one face contacts silicone and the other contacts polar substrates
- High-temperature adhesive assembly where silicone chemistry extends thermal service range
- Gasket and seal applications requiring conformability and compatibility with silicone components
Common industries: Silicone rubber converting, medical device converting, electronics assembly, industrial manufacturing, high-temperature applications.
Polysil™ SA 1911 is a differential double-coated adhesive tape engineered specifically for bonding dissimilar materials across the silicone/non-silicone divide. The construction pairs 2.8 mils of silicone pressure sensitive adhesive on one face with 2.2 mils of acrylic pressure sensitive adhesive on the opposite face, supported by a 0.5 mil PET carrier.
The silicone adhesive is formulated for strong bonding to silicone-based substrates — including silicone foams, rubber, and liquid silicone rubber (LSR) — which are typically incompatible with standard acrylic adhesives. The acrylic adhesive face provides high-adhesion bonding to a wide range of conventional materials and contributes excellent heated shear performance to the overall construction.
Performance is notably balanced between the two faces: peel adhesion is 72 oz/in (silicone) and 70 oz/in (acrylic), and both faces deliver greater than 168 hours (7 days) of shear hold at 2.2 psi per PSTC-107. Tack values are 42 oz (acrylic) and 38 oz (silicone) per ASTM D2979. The PET carrier provides dimensional support with a 15 lb/in tensile strength and 110% elongation per PSTC-131.
Service temperature extends from −40°F to 300°F — the silicone chemistry contributes to the elevated upper limit. The TDS notes excellent conformability and performance maintenance at high temperatures.
What differentiates SA 1911 from other silicone/acrylic differential tapes?
SA 1911 is positioned as a balanced-performance differential adhesive, with nearly symmetric peel adhesion on both faces (72 silicone / 70 acrylic oz/in) and identical shear performance (>168 hours on both sides). This balance makes it well-suited for general-purpose dissimilar-material bonding where the silicone side handles silicone-family substrates and the acrylic side provides strong adhesion across polar substrates, without trade-offs in one direction.
Why is peel adhesion important when selecting this tape?
For differential silicone/acrylic tapes, peel adhesion must be evaluated separately on each face — they serve completely different substrate families. SA 1911's 72 oz/in on silicone confirms strong anchoring to silicone foams and rubber (substrates where standard acrylics fail outright), while the 70 oz/in acrylic side confirms strong bonding to conventional polar substrates including metal, glass, and most plastics.
What is the service temperature range for SA 1911?
SA 1911 has a service temperature range of −40°F to 300°F.
Is SA 1911 suitable for high-temperature or silicone-contact applications?
Yes. The silicone adhesive chemistry extends the upper service temperature to 300°F — higher than most pure-acrylic double-coated tapes — and provides direct compatibility with silicone foams, silicone rubber, and LSR substrates that standard acrylic tapes cannot bond to reliably. No specific regulatory compliance standards are listed on the TDS for this material.
How should SA 1911 be specified?
Specify grade (Polysil SA 1911), orientation (silicone side to silicone substrate / acrylic side to polar substrate), adhesive thicknesses (2.2 mils acrylic / 2.8 mils silicone), carrier (0.5 mil PET), liner (white kraft), compliance requirements, dimensional tolerances, and finished format.
