Loctite 312 structural adhesive is an ultra fast setting, two step acrylic, no mixing required, amber adhesive. 312 has a very low viscosity and should be used in conjunction with Loctite primer 736 to create a tough durable bond on close fitting parts. Magnetic bonding structural adhesive. Loctite 312 typical applications include bonding dissimilar materials such as metals, glass or ceramics and where fast fixturing is required between close fitting parts.