Q u e s t i o n s ? C o n t a c t D e v c o n T e c h n i c a l S e r v i c e s : 8 0 0 - 9 3 3 - 8 2 6 6 w w w . d e v c o n . c o m CLEAN SURFACE PREPARATION 1. Degrease area with Devcon ® Cleaner Blend 300 #19510 . 2. Remove all surface contamination (paint, rust, and grime) from surface by abrasive blasting, sanding, filing, coarse grinding wheel (60 grit or coarser), a needle gun, or high velocity water blasting with abrasive medium, or other mechanical means. 3. The blasting medium should be angular grit such as silicone carbide, Black Beauty, or aluminum oxide. A .003 to .005 mil profile should be attained. The medium Black Beauty (size 1240 medium grade) will produce this grade. 5. Degrease again with Cleaner Blend 300 #19510 to wash away any remaining blasting medium. 6. Immediately apply epoxy to a dry, rough surface to avoid oxidation or flash rusting. If this is not practical, apply a general coating of Devcon ® FL-10 Primer #15980 to protect surfaces. This will stop further rusting for up to 30 days under ideal storage conditions. WET SURFACE PREPARATION 1. The general procedure concerning any surfaces to be repaired is "IT MUST BE DRY" . (An exception is when you use Devcon's Underwater Repair Putty UW #11800 . See the Underwater Repairs below) 2. Stop all leaks or seepage, using one or more of the following methods: A. Shut off the flow or pressure. B. Fit a wooden peg or sheet metal screw into the hole to stop the flow. C. Stuff with wax, cork, plumbers caulk, Mortite, or a cloth into the opening to stop the flow. 3. If the leak is caused by corrosion, the side wall might be weak. Open the orifice until good metal is exposed and the wall is thick enough to be plugged. 4. Remove surface condensation, "sweating", and dampness by using a hot air gun or similar device. 5. Continue surface preparation (following steps in CLEAN SURFACE PREPARATION above). DEGREASING NOTE: With surfaces immersed in oil, there is always the possibility that oil absorbed into the metal surface (such as pump shafts or bearing housings) will cause an adhesion problem after curing. 1. Repeated applications of Devcon ® Cleaner Blend 300 #19510 will help "pull-out" the oil from the surface. 2. Also, heating the part with a heat gun, or by putting the part in an oven, will force the oil out of the pores. 3. Allow part to cool and clean again with Cleaner Blend 300 #19510 . CHLORIDE CONTAMINATION: Metals in salt water inherit high chloride (salt), levels over time. After blasting, test for chloride contamination as these salts act as a release agent and will disbond most coatings. UNDERWATER REPAIRS Use Devcon's Underwater Repair Putty UW #11800 to make these repairs. It bonds and cures underwater. Surfaces underwater require preparation. 1. Remove all dirt, flaking paint, barnacles, algae and seaweed from the substrate. 2. Wipe area with clean cloth to remove film. 3. Abrade surface if possible by mechanical means, file, pressured water, grit blasting or chemicals. ALUMINUM REPAIRS Oxidation of aluminum surfaces reduce the adhesion of an epoxy, and must be removed before using Devcon's Aluminum Putty (F) # 10610 or Aluminum Liquid (F-2) # 10710 . 1. Remove by mechanical means, such as grit blasting, or by chemical means. 2. Continue surface preparation (following steps in CLEAN SURFACE PREPARATION above). 3.