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Adheseal PU15 is a low-modulus polyurethane sealant and adhesive for window perimeter weathersealing, curtain wall interfaces and moving façade joints. Its soft Shore A 15 profile and more than 600% elongation make it a flexible option where aluminium frames, cladding and adjoining materials move differently.
Designed for non-structural weatherseals around mechanically fixed glazing, PU15 also suits compatible precast panel joints, metal cladding, masonry connections and general construction sealing. It cures with atmospheric moisture to form an elastic, weather-resistant joint and can be painted with suitable coatings after compatibility testing.
Apply to stable, clean and dry surfaces and check substrate preparation, primer and backing-rod requirements. Test adhesion on coated metals, plastics and unfamiliar materials. PU15 is not a structural glazing adhesive and must not be used for mirror bonding, aquariums, long-term immersion or chlorinated swimming-pool joints. Avoid bitumen, natural rubber, EPDM and substrates that release oils or plasticisers; do not use on lead or copper.
For a firmer general-purpose joint sealant, compare PU25 FC; for high-modulus, anti-pick joints, consider PU50.
How much movement can PU15 accommodate?
It is rated for ±25% joint movement and classified Type F Class 25 LM to ISO 11600.
Can PU15 be used in swimming pools?
No. It is not suitable for internal pools with high chlorine exposure or permanent immersion.
Can it be used for structural glazing?
No. Use a suitable structural glazing silicone.
What temperature can I apply it at?
Apply between 5°C and 40°C.
| Property | Value |
|---|---|
| Curing System | Moisture |
| Cure Rate | 3mm / 24Hours |
| Density Black | 1.16 g/cm3 |
| Density Others | 1.18±0.02 g/cm3 |
| Shore A Hardness | 15 (after 14 days) |
| Movement Capability | +/- 30% |
| Tear Strength | 5.5 N/mm |
| Elongation | >600% |
| Modulus | 0.2 MPa @ 100% |
| Application Temperature | +5°C to +35°C |
| Service Temperature | -40°C to +80°C |
| Pot Life | 25 minutes @ 23°C & 50% RH |
| Skin Time | 60 minutes @ 23°C & 50% RH |
| VOC Content | 95 gm/lt |
| Shelf Life | 12 months in original packaging |
| Storage Conditions | Cool Dry between 10°C and 35°C |
| UV Resistance | Good |
| Chemical Resistance | Excellent for water, detergent solutions, moderately diluted acids & alkalis, petrol & oil for short periods |
| Fire Performance | Intumesced for a few seconds at 60kW/m2 exposure |
| Form | Paste |
| Odour | Slight odour |
| Solubility in Water | Insoluble |
| Specific Gravity | Black:1.16. Others 1.18±0.02 |
| Flash Point | >70 °C (ISO3679) |
| Autoignition Temperature | >200 °C |
| Full Cure | 3mm / 24Hours |
Here are some common examples on where Adheseal PU15 Polyurethane Adhesive used by our customers.
