One-part low modulus polyurethane sealant for construction.

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