Loctite 435 Toughened Instant Adhesive 25ml
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Loctite 435 is a one-part, low viscosity, rubber-toughened ethyl cyanoacrylate instant adhesive. It cures with moisture, needs no mixing, and bonds metals, plastics and rubbers as well as porous and absorbent materials such as wood, paper, leather and fabric.
The toughening is increased flexibility and peel strength with enhanced resistance to shock. The liquid is colourless to straw coloured and slightly cloudy.
Where this product is used
- Bonding metals, plastics and rubbers
- Bonding porous and absorbent materials such as wood, paper, leather and fabric
- Assemblies that see shock or flexing, where a toughened bond line is wanted
- Steel, aluminium, ABS, PVC, polycarbonate, phenolic and G-10 epoxy parts
Features
- One part, no mixing
- Rubber toughened, with increased flexibility and peel strength
- Low viscosity: 100 to 250 mPa·s (cone and plate, 25 °C)
- Under 5 seconds to 0.1 N/mm² shear on nitrile rubber and balsa, 30 to 45 seconds on degreased steel (22 °C, 50% RH)
- 19 N/mm² lap shear on grit-blasted steel (24 h at 22 °C, ISO 4587)
- Side impact of at least 4 J on aluminium
- Glass transition temperature of 130 °C (ISO 11359-2)
Key specifications
| Specification | Detail |
|---|---|
| Brand | Loctite |
| Chemical type | Ethyl cyanoacrylate, rubber toughened |
| Colour (uncured) | Colourless to straw coloured, slightly cloudy liquid |
| Components | One part, no mixing |
| Cure | Humidity (moisture) cure |
| Viscosity (cone and plate, 25 °C, shear rate 1,000 s⁻¹) | 100 to 250 mPa·s |
| Fixture time (time to 0.1 N/mm² shear, 22 °C, 50% RH) | Nitrile rubber under 5 s; ABS and phenolic 10 to 20 s; degreased steel and neoprene 30 to 45 s; polycarbonate 45 to 60 s; PVC 60 to 75 s |
| Lap shear, grit-blasted steel (ISO 4587, 24 h at 22 °C) | 19 N/mm² |
| Lap shear, aluminium (same conditions) | 15 N/mm² |
| Tensile strength, grit-blasted steel (ISO 6922, 24 h at 22 °C) | 30 N/mm² |
| 180 degree peel, grit-blasted steel (ISO 8510-2, 48 h) | 4 N/mm |
| Side impact, aluminium | At least 4 J |
| Glass transition temperature (ISO 11359-2) | 130 °C |
| Storage | 2 °C to 8 °C, unopened, dry |
Choosing the right option
Loctite 435 is a low viscosity toughened grade. For a black, high viscosity toughened grade, see Loctite 410 Black Toughened Instant Adhesive 20g; for a black toughened grade in the same 25ml size, see Loctite 438 Black Toughened Instant Adhesive 25ml.
For a general purpose grade without toughening, see Loctite 401 Instant Adhesive.
See also: Loctite 410 Black Toughened Instant Adhesive 20g, Loctite 438 Black Toughened Instant Adhesive 25ml, Loctite 401 Instant Adhesive, Loctite 406 Instant Adhesive for Plastics and Rubbers.
Using it
The product suits thin bond gaps (0.05mm). Cure slows as the gap increases.
Fixture times are the time to 0.1 N/mm² shear at 22 °C and 50% RH, and vary widely by substrate.
Full chemical and solvent resistance takes at least 24 hours.
Storage and handling
Store unopened, in a dry place, at 2 °C to 8 °C. Storage outside this range can affect the properties of the product.
Limits and safety
Not recommended for pure oxygen or oxygen-rich systems, or as a sealant for chlorine or other strong oxidising materials. Read the safety data sheet before use.
It has been tested to test protocols based on ISO 10993 biocompatibility standards, to help with product selection for the medical device industry.
Is a test basis, not a certification.
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Loctite 435 Toughened Instant Adhesive 25ml
SKU: A0049800 | Model: 435-25ML-LOC
Loctite 435-25ML-LOC: loctite 435 rubber-toughened ethyl cyanoacrylate. Size: 25ml. Type: Rubber-toughened instant adhesive.

