Lanco® Bonding Agent CB-410 • CB-420 is a concrete bonding adhesive for interior or exterior use, to bond new concrete to old without laborious scarification process which is usually necessary. It withstands humidity and temperatures from 40 F to 300 F (-400 C to 149 C); can be applied over damp or dry surfaces and is not affected by alkalinity of lime plaster or Portland cement. Available in white or blue.