even on slightly wet surfaces

the activation process has to be repeated (once only)

The unique foam resists distortion from drilling

thereby eliminating the risk of incorrect mixing by human error

Sealing of joints where high fire safety standards are required

Sikaflex 221 White Polyurethane Sealant 300ml (Box of 12) Bondloc even on slightly wet surfacesThe Sikaflex 221 is a high quality multipurpose single component polyurethane adhesive sealant that cures on exposure to atmospheric humidity. It is suitable for internal sealing and simple bonding applications. It bonds well to a wide variety of substrates and is suitable for making permanent elastic seals of high adhesive strength. Suitable substrate materials are metals, metal primers and paint coatings (2 C systems), ceramic materials and