SIS (Styrene-Isoprene-Styrene) — Thermoplastic Elastomer
SIS is a styrene-isoprene-styrene block copolymer and the standard base polymer for pressure sensitive hot-melt adhesives. Allzone supplies SIS to Canadian adhesive and tape manufacturers with the grade confirmed against supplier documentation before quotation.
At a glance
- Product
- SIS (Styrene-Isoprene-Styrene)
- Grades
- Thermoplastic Elastomer
- Typical applications
- Pressure sensitive hot-melt adhesives for tapes and labels · Hygiene product construction and elastic attachment adhesives · Assembly and packaging hot-melt formulations
- Packaging
- Packaging confirmed at quotation
- • Certificate of Analysis is provided against the confirmed shipment, grade and batch.
- • Manufacturer TDS and SDS are subject to grade and supplier confirmation and are available on request.
- • Grades, packaging and origin above are indicative sourcing options and are confirmed at quotation.
Available grades from container-direct sourcing
Thermoplastic Elastomer
Grade and specification confirmed against supplier technical data sheet at quotation.
Typical applications
- Pressure sensitive hot-melt adhesives for tapes and labels
- Hygiene product construction and elastic attachment adhesives
- Assembly and packaging hot-melt formulations
- Sealants and modified bitumen compounds
Why Canadian buyers choose us
- Container-direct sourcing coordinated through our Ontario logistics partner
- Supplier documentation (TDS, SDS, COA) requested and shared before order confirmation
- Specifications confirmed in writing at quotation stage — no assumed values
- LTL and FTL freight across Ontario, Quebec and Western Canada
- Quantities reviewed per enquiry, from smaller lots to full container loads
Typical industries served
Material identity
SIS (styrene-isoprene-styrene) block copolymer — identifiers and the names buyers use
- CAS
- 25038-32-8
- Polymer family
- Styrenic block copolymer — adhesive grade
- Key commercial variables
- Styrene ratio and diblock content — declared per grade
Also searched as
Abbreviations
Industry terminology
Identifiers are published for material identification. The exact specification of any offered grade is confirmed against supplier documentation at quotation.
Buyer intent coverage
SIS (styrene-isoprene-styrene) block copolymer — what it is, where it is used, how it is chosen
SIS is the styrenic block copolymer optimised for pressure-sensitive adhesives: the isoprene mid-block is softer and tackier than a butadiene mid-block, so the polymer accepts high tackifier loadings and delivers immediate grab. It is bought almost entirely by adhesive formulators supplying tape, label and hygiene converters, and the two variables that actually control the purchase are styrene ratio and diblock content, both of which change how the finished adhesive balances tack against cohesive strength.
Primary uses
- Formulating hot-melt pressure-sensitive adhesives
- Producing tape and label adhesive systems
- Building construction and elastic-attachment adhesives for hygiene products
- Adjusting tack and peel balance in existing adhesive recipes
Applications
- Packaging and masking tapes
- Self-adhesive labels and graphic films
- Disposable hygiene product assembly
- Assembly adhesives requiring immediate grab
Advantages
- Accepts high tackifier loading, which gives formulators a wide adhesive design window
- Delivers instant tack without solvent-based chemistry
- Diblock content offers a direct formulation lever between tack and cohesion
Limitations to consider
- The isoprene mid-block is sensitive to oxidation and ultraviolet exposure and needs antioxidant protection
- Cohesive strength at elevated temperature is lower than in hydrogenated systems
- Performance is decided by the whole adhesive recipe, so a polymer swap always requires re-formulation trials
How to choose the right grade
- Define the end system first — bitumen modification, adhesive, compounding or footwear each favour a different structure
- State the required service temperature range and whether the part sees sunlight or ozone
- Confirm the physical form your equipment can feed (porous pellet, crumb, powder or bale)
- Compare declared hardness and styrene or acrylonitrile content before comparing anything else
- Exact specification is confirmed against supplier documentation at quotation.
Typical grades
- High-diblock adhesive grade
- Low-diblock grade
- High-styrene grade
- Clear-film adhesive grade
- Reference grade names are widely used as shorthand in enquiries. They are treated here as search language only: an equivalent is confirmed by comparing declared datasheet values and by a line trial, and no grade is presented as a drop-in replacement for another.
Comparable materials — how SIS (styrene-isoprene-styrene) block copolymer sits against alternatives
- SBS where cohesion outweighs immediate tack
- SEBS for heat and ageing resistance
- Acrylic adhesive systems as a different chemistry route
- Buyers searching for an alternative or second-source supplier should state the incumbent grade and the property they are matching, because a like-for-like comparison depends on the declared datasheet values and on line trials, not on the material name alone.
Comparable-material reference. Grade selection is confirmed at RFQ against your process.
Procurement coverage
How to specify, order and receive SIS (styrene-isoprene-styrene) block copolymer
Written for procurement, quality and technical buyers in Canada and the United States. No numeric price, MOQ, stock or lead-time value is published — those are confirmed per shipment in the quotation and against the confirmed batch.
How buyers specify at RFQ
- Polymer structure (linear or radial) and declared styrene content
- Hardness and the target modulus of the finished compound
- Physical form and bulk density the feeding system accepts
- Oil extension present or absent
- Service temperature range and weathering exposure
- Regulatory status required for the finished part
Packaging options (industry-standard)
- 25 kg bag — the standard format for small and medium converters
- Octabin or jumbo / FIBC bag for higher-volume moulding and extrusion lines
- Bulk silo truck or rail hopper where the plant has compatible intake and drying
- Packaging options and available pack sizes are confirmed with each quotation.
Storage & handling
- Store sealed, dry and off the floor; moisture pick-up shows up as splay, voids and property loss
- Keep hygroscopic polymers in their original sealed packaging until they go to the dryer
- Rotate stock and record lot numbers against each production run for traceability
Documentation available
- Technical data sheet (TDS) for the exact grade offered, including the declared melt index and density
- Safety data sheet (SDS) in the format required for Canadian import
- Certificate of analysis (COA) against the confirmed production lot
- Food-contact or regulatory declaration where the end use requires it
- Documentation is confirmed per batch at quotation; availability depends on the grade and supplier offered.
RFQ checklist for sis-styrene-isoprene-styrene-canada
Include these fields to receive an accurate Canada-landed quotation
- Base polymer and the process the material runs on (extrusion, injection, blow moulding, thermoforming)
- Machine type, output rate and the processing temperature window
- End application and whether the finished part is food-contact, potable-water or outdoor
- Annual volume and expected per-shipment quantity
- Packaging format your intake and feeding system can receive
- Documentation required per shipment
- Delivery province or port of discharge
- Compound or system the elastomer goes into and the incumbent grade being matched
- Physical form your mixing or feeding equipment accepts
Technical & procurement detail
Functional role of sis (styrene-isoprene-styrene)+
The polystyrene end blocks act as physical crosslinks that give cohesive strength, while the soft isoprene mid-block provides the tack and compliance a pressure sensitive adhesive needs. Because the crosslinks are thermally reversible, the compound can be melted, coated and re-melted without cure chemistry.
Selecting the right grade+
Styrene content, diblock ratio, molecular weight and whether the polymer is linear or radial control tack, cohesion, melt viscosity and coating temperature. Adhesive type — tape, label, hygiene or assembly — and the tackifier and oil system it will be compounded with drive the selection.
Documentation and specification+
Properties differ between producers and between grades of the same material. Allzone confirms the applicable grade with the supplier before quoting and shares the technical data sheet and safety data sheet for the exact material offered, so the values you evaluate are the values you receive.
Frequently asked questions
When is SIS chosen instead of SBS?+
SIS is preferred for pressure sensitive adhesives because the isoprene mid-block gives higher tack; SBS is typically chosen where cohesive strength, hot-melt assembly performance or bitumen modification matters more.
Which grade will I be quoted?+
The grade is set by your specification. Share the target performance, process conditions and any customer or regulatory requirement in the RFQ and the matching grade is confirmed with the supplier before quotation.
What packaging is available?+
Packaging is confirmed with the supplier at quotation for the grade and quantity discussed.
Can you deliver across Ontario and Quebec?+
Yes. LTL and FTL freight is arranged across Ontario, Quebec and Western Canada, with container-direct supply for repeat volumes.
Technical knowledge for SIS Styrene-Isoprene-Styrene Supplier — Canada
Engineering and purchasing guidance written for this material — understand it, apply it, compare options, specify a grade, and fix production problems.
Foundation Articles
Application Guides
Comparison Articles
Buying Guides
Related products
Materials commonly quoted alongside SIS (Styrene-Isoprene-Styrene) by the same plants.
Calcium Carbonate (CaCO3) Filler & Masterbatch
Mineral filler — raffia woven sacks and FIBC liners
Titanium Dioxide (TiO2)
Pigment — plastic white masterbatch (PE / PP / PS / PET)
Talc Filler & Talc Masterbatch
Mineral carrier and flow aid — polypropylene automotive bumpers and interior trim
Barium Sulfate
Mineral filler — density and sound damping compounds
Need a quote on SIS (Styrene-Isoprene-Styrene)?
Request pricing, TDS/SDS and available documentation. We usually acknowledge enquiries within one business day; samples are subject to supplier availability and product classification.