SpECseal PU25

SpECseal PU25 is ideal for a variety of construction applications, ensuring durability and performance. Typical uses include:
• Concrete expansion joints
• Precast concrete cladding
• Brick cladding
• Perimeter caulking (windows, doors, aluminium frames)
• Expansion and construction joints in water-retaining structures
• Curtain wall joints
• Parapet walls

SpECseal PU25 offers a range of advantages that enhance its effectiveness and usability in various construction applications. Its unique properties ensure that it meets the demands of modern building projects while providing long-lasting performance. The key advantages include:
• Highly resilient with an elongation at break of 300%
• Excellent recovery characteristics, ensuring a permanent seal
• Provides a uniform watertight seal that adapts to movement
• Superior adhesion to most building substrates, often without the need for primer
• Non-toxic formulation, safe for use in potable water reservoirs and swimming pools
• Easy application as a one-component sealant with no mixing required
• Compatible for overpainting with water-based paints (Note: paints may crack with excessive joint movement)
• Good chemical resistance to sewage, sabkha, mineral acids, alkalis, and salt water
• Available in multiple colors: black, grey, white, beige, and ivory
• Suitable for both horizontal and vertical applications, providing versatility in use

SpECseal PU25 is a high-performance sealant characterized by its exceptional technical properties that contribute to its effectiveness in diverse applications:

Property	Value
Shore A Hardness	25 ± 3
Elongation at Break	300%
Modulus at 100%	0.25 MPa
Skin Formation Time	6 hours
Curing Speed	3mm/day (23°C, 50% R.H.)
Solid Content	100%
Temperature Resistance	0 to 90°C
Movement Accommodation Factor	25%
Specific Gravity @ 20°C	1.50
Consistency	Thixotropic
Colours Available	Black, grey, white, beige, ivory (other colors subject to minimum quantity)
Ultraviolet Light Resistance	Good
Chemical Resistance	Sewage: Medium, Sabkha: Medium, Dilute Acids and Bases: Medium, Salt Water: Excellent

Application of SpECseal PU25
SpECseal PU25 is designed for various applications, providing versatility and reliability in construction projects. The following guidelines outline the application process: Joint Preparation:
Before applying SpECseal PU25, ensure that the joint edges are clean, dry, and free from oil, loose particles, cement laitance, and other contaminants that may affect adhesion. A thorough wire brushing, grinding, sandblasting, or solvent cleaning may be required to expose a clean and sound substrate. For submerged conditions, a firm backing and good adhesion to joint sides are essential. Concrete must be fully cured (4 weeks), and the use of SpECtop Primer EP121 is recommended. Coverage:
One 600 ml sausage of SpECseal PU25 will fill 6 linear meters of a joint measuring 10mm x 10mm. For larger joints, maintain a width-to-depth ratio of 2:1. In open joints, use SpECcord backer rods to keep a uniform joint depth. Application Method:
SpECseal PU25 is available in a ready-to-use self-contained sausage that can be loaded onto a barrel gun. Start extruding the sealant into the joint firmly while maintaining even pressure on the trigger of the gun. On vertical joints, begin extrusion from the bottom and continue to the top. Once installed, a suitable rounded tool can be used to achieve a smooth hourglass profile. Avoid using soapy water solutions. Remove any masking tape immediately after the sealant is applied. Equipment Cleaning:
Clean tools immediately after use with solvent (white spirit) before the sealant cures. Cured material can only be removed by mechanical means. Application Temperature Range:
Minimum: +5°C
Maximum: +40°C

SpECseal PU25 is available in convenient packaging for easy application:
– Supplied in 600ml sausage sachets.
– Each box contains 20 sausages.
– A pallet includes 96 boxes.