BSI SLOW-CURE™ 30-minute epoxy is an equal two-part adhesive that forms a high strength bond. Cured Epoxy is resistant to most chemicals. BSI SLOW-CURE™ has the highest strength of the BSI line of epoxies. BSI SLOW-CURE™ Bonds best to clean, textured surfaces. Smooth, non-porous surfaces should be roughened with sandpaper to improve adhesion.