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Adheseal PU25 FC is our fast-curing, medium-modulus polyurethane sealant and adhesive for expansion joints, precast panels, pavement joints and general construction sealing. It accommodates ±25% joint movement and cures to a Shore A 25 flexible seal.
Use PU25 FC on suitable concrete and masonry connections, tilt-up panels, metal cladding, aluminium fabrication and non-structural window perimeters. It bonds to compatible porous and non-porous surfaces and can be painted with suitable coatings after testing.
PU25 FC is tested to AS/NZS 4020 for potable-water contact. It can also be used in specified below-waterline applications once fully cured.
Match joint dimensions, backing rod and primer to the job. Do not use PU25 FC for structural glazing, mirror bonding, aquariums or internal swimming pools with high chlorine exposure. Avoid bitumen, EPDM, natural rubber, lead and copper. Stain-test natural stone before use.
Need a softer sealant for more movement-sensitive joints? Compare PU15, or choose PU50 for a firmer cured seal. Browse our polyurethane sealants.
How much movement can PU25 accommodate?
It is rated for ±25% joint movement to ASTM C 719.
Is PU25 suitable for potable water contact?
Yes. It has been tested to AS/NZS 4020.
What joint size can PU25 be used in?
Maximum joint width is 30mm and maximum depth is 15mm, with a 2:1 width-to-depth ratio used for movement joints.
Can PU25 be used in swimming pools?
Do not use it in internal swimming pools with high chlorine exposure.
| Property | Value |
|---|---|
| Product Type | Polyurethane |
| Curing System | Moisture |
| Cure Rate | 3 mm / 24 hours |
| Density (Black) | 1.15 g/cm³ |
| Density (Other Colours) | 1.16 ± 0.02 g/cm³ |
| Shore A Hardness | 25 (after 14 days) |
| Movement Capability | ±25% |
| Tear Strength | 6.5 N/mm |
| Elongation | >400% |
| Modulus (100% Elongation) | 0.4 MPa |
| Application Temperature | +5°C to +35°C |
| Service Temperature | -40°C to +80°C |
| Working Time (23°C, 50% RH) | 25 minutes |
| Skin Time (23°C, 50% RH) | 60 minutes |
| VOC Content | <1.5 g/L |
| VOC (European 2004/42/CE) | 95 g/L |
| Shelf Life | 12 months in original packaging |
| Storage Conditions | Cool and dry, 10°C to 35°C |
| UV Resistance | Good |
| Chemical Resistance | Excellent for water, detergent solutions and moderately diluted acids and alkalis; petrol and oil for short periods |
| Accelerated UV & Weathering | No chalking, cracks or yellowing (ASTM C793-05; ISO 11431; ISO EN 14187-8) |
| Fire Performance (AS 1530.3 Indices) | Ignitability 0; Spread of Flame 0; Heat Evolved 0; Smoke Developed 0–1 |
Here are some common examples on where Adheseal PU25 Polyurethane Adhesive used by our customers.
