Bostik Simson ISR 70-03 Elastic Adhesive and Sealant
High-strength elastic SMP adhesive sealant for caravans, transport and construction. ISR 70-03 in 290ml cartridges and 600ml sausages.
Pickup available at Rite Price Industrial
Usually ready in 4 hours
Dispatch & Deliveries
When you make an order with Rite Price Distributors it’s important that you get the goods you need, for the right price, on time. That’s why we charge cost effective shipping rates that get your supplies to you as quickly and safely as possible.
For local orders in and around the Gold Coast we use Aramex Couriers for fast distribution.
For all other deliveries throughout Australia we use Australia Post.
Returns Policy
Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
There are certain situations where only partial refunds are granted: (if applicable)
- Any item not in its original condition, is damaged or missing parts for reasons not due to our error.
- Any item that is returned more than 14 days after delivery
Bostik Simson ISR 70-03 is a high-performance elastic adhesive and sealant based on Silyl Modified Polymer (SMP) technology.
Designed for demanding industrial, transport and construction environments, it combines high mechanical strength with long-term flexibility, making it ideal for structural bonding and sealing where vibration, movement and dynamic loads are present. ISR 70-03 adheres exceptionally well to metals, painted and powder-coated surfaces, GRP, polyester, PVC and many other substrates, often with little or no primer. It is solvent-, isocyanate- and silicone-free, with excellent UV, weather and temperature resistance, making it suitable for both interior and exterior use. Compared with traditional polyurethane or silicone systems, ISR 70-03 offers cleaner handling, low odour, better paint compatibility and reduced health and safety concerns. Available in 290ml cartridges and 600ml sausages in black, white and grey, it is a go-to solution for caravan and motorhome construction, truck and bus body building, rail, marine, general fabrication and OEM production lines where reliable, long-lasting bonds and seals are critical.
Features & Benefits
Key Features
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High-strength elastic SMP adhesive/sealant
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Solvent-, isocyanate- and silicone-free formulation
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Excellent UV, weather and ageing resistance
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Very good adhesion to a wide range of substrates (often without primer)
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Permanently elastic from approx. -40°C to +110°C (service temperature)
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Neutral, low-odour and fast-curing moisture-reactive system
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Paint compatible with most industrial coating systems (compatibility testing recommended)
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Available in black, white and grey
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Pack sizes: 290ml cartridges and 600ml sausages
Key Benefits
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Combines bonding and sealing in one product, reducing inventory and complexity
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Maintains strong, flexible bonds under vibration and dynamic loads
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Excellent outdoor durability for caravans, motorhomes, trucks, buses and marine applications
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Low odour and solvent-free chemistry improves workplace comfort and safety
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Saves time on surface preparation thanks to primerless adhesion on many substrates
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Paintable to match surrounding substrates and finishes
Technical Specs (Typical Values – from TDS)
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Chemistry: Silyl Modified Polymer (SMP)
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Curing mechanism: Moisture curing
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Density: ~1.5 g/ml
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Skin formation: ~10 minutes at 23°C / 50% RH
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Curing speed: ~3 mm/24 hours at 23°C / 50% RH
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Shore A hardness: ~58
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Elongation at break: ~200%
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Tensile strength (at break): ~3.5 MPa
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Service temperature: approx. -40°C to +110°C
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Application temperature: +5°C to +40°C
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Colours: Black, White, Grey
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Packaging: 290ml cartridge; 600ml (and 400ml) sausage
Key Applications
Typical Uses
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Structural bonding of panels, frames and profiles on buses, trucks, trailers and rail vehicles
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Bonding of sunroofs, roof elements and corner profiles on caravans and motorhomes
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Bonding of aluminium and polyester sandwich panels and body components
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Elastic bonding and sealing in marine, yacht and commercial vessel construction
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Floor bonding systems and general industrial fabrication where high strength and elasticity are required
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Sealing and bonding joints exposed to vibration, movement, UV and weather in transport and construction
Product FAQs
Q1. What type of adhesive is Bostik Simson ISR 70-03?
A1. It is a high-strength elastic adhesive and sealant based on Silyl Modified Polymer (SMP) technology, combining structural bonding performance with long-term flexibility.
Q2. Which substrates does ISR 70-03 bond to?
A2. It adheres very well to aluminium, stainless steel, galvanised steel, polyester/GRP, painted and powder-coated metals, PVC, glass and many coated surfaces, often without primer. Very low-energy plastics like untreated PP, PE and PTFE are not suitable without special pretreatment.
Q3. Can I paint over ISR 70-03?
A3. Yes. It is generally compatible with most common industrial paint systems (alkyd and dispersion). Always perform a paint compatibility test and follow the paint manufacturer’s recommendations.
Q4. Is it suitable for exterior applications on caravans, trucks and boats?
A4. Yes. ISR 70-03 has excellent UV, weather and temperature resistance and is specifically designed for exterior transport and marine environments.
Q5. Does it contain solvents or isocyanates?
A5. No. The formulation is free from solvents, isocyanates and silicone, making it safer and more pleasant to use compared with many traditional systems.
Q6. How long does it take to cure?
A6. Skin forms in around 10 minutes at 23°C and 50% RH, with a typical cure speed of about 3mm per 24 hours. Thicker beads and lower temperature/humidity will increase cure time.
Q7. When should I use primers or surface preps?
A7. On highly stressed bonds, difficult substrates or in wet/condensing conditions, the use of Bostik Simson prep products (such as Prep M, Prep G or Prep P) is recommended to maximise adhesion and durability.
