June 28, 2016
A customer writes: “I installed your Product #1 All Purpose Epoxy Coating on our floor about 20 years ago. The floor is not warn out or pealing. It does have scratches where pallets with nails sticking out the bottom has scratched the surface. I want to change the color to our company color anyway, so I want to re-coat the whole floor. How do I proceed from here?”
You will want to sand the existing floor removing all the shine. It sounds like there was quality installation and surface prep, since you have no lifting or pealing. If you should have any that is loose you need to completely remove loose coating . Solvent wipe with Xylene. Lets solvent dry and apply your epoxy normally.
CAUTION: Epoxy doesn’t like sticking to epoxy unless you do your surface prep meticulously. I always recommend doing a test patch to test your surface preparation before you proceed with doing the rest of the floor. This can be done by placing a small test patch or patches. Let them harden overnight and then try removing them with a putty knife, screw driver of similar method to insure it is well bonded.
For more information please contact Epoxy.com Technical Support Department by email at: email@example.com or by phone 353-533-2167.
Leave a Comment » | Epoxy, epoxy education, Installation, seamless epoxy flooring system, Seamless Epoxy Flooring Systems, Surface Preparation, Waterproof Seamless Flooring, Waterproofing | Permalink
Posted by Norm Lambert
July 10, 2015
The problem with getting superior adhesion to difficult to bond to surfaces like stainless steel and aluminum has been solved
The Technical Support Department here gets many calls from people needing help in selecting the right coatings for a variety of metals and difficult to bond to surfaces. Carbon steel is easy to bond to when it is well sandblasted and you use one of our high end epoxy coatings like Product #2 Chemical Resistant Epoxy. What if the carbon steel cannot be sandblasted and can only be ground? What about stainless steel and other difficult to bond to metals and coatings? Epoxy.com Product #660 Universal Primer and Finish was designed to solve these bonding issues.
Product #660 Universal Primer and Finish is a one component, moisture cured polyurethane aluminum filled primer and coating. Product #660 Universal Primer has a low viscosity, with high “wetting” characteristics, and blistering resistance. This makes Product #660 Universal Primer and Finish a superior primer. It can also be used as a finish coat. Epoxy.com Product #660 Universal Primer and Finish undergoes a rapid molecular weight change as it polymerizes into a high molecular weight finish with excellent corrosion and abrasion resistance.
Epoxy.com Product #660 Universal Primer and Finish is an ideal barrier coat when upgrading existing finishes to strong urethanes, coal tar epoxy, etc. The low solvency power of Epoxy.com Product #660 Universal Primer and Finish enables it to be applied over most types of coatings without causing lifting. A test sample should be made to confirm adhesion. Most generic types of chemical or conventional coatings may be applied over Epoxy.com Product #660 Universal Primer and Finish with excellent adhesion.
- Excellent primer for all types of surfaces.
- Superior “wetting out” properties over sound, rusty steel.
- Can be recoated in 1 to 2 hours and can be top coated with most generic type coatings.
- Cures down to 25 degrees F on dry surfaces.
- Service Temperature up to 400 degrees F
- Corrosion resistant: Passes 12,000 hours in salt cabinet.
- Good weather resistance.
Now with Epoxy.com Product #660 Universal Primer you can bond to well sanded (ground) stainless steel, aluminum, and carbon steel that cannot be sandblasted. Product #660 Universal Primer is also effective in bonding to other difficult to bond to metals and many other hard to bond to coatings.
Product #660 can apply 2 coats and use it as a standalone coating. You can apply any of our 100% solids high quality epoxies or vinyl esters over it. The problem with getting superior adhesion to difficult to bond to surfaces like stainless steel has been solved.
Please contact Epoxy.com Technical Support Department at 352-533-2167 with your questions. Epoxy.com Technical Support is dedicated to making sure you have the right product for the right job.
Leave a Comment » | Chemical Resistance, rusty steel, stainless steel, steel, Surface Preparation | Tagged: aluminum coatings, coating, epoxy primer, primer, rusty steel, stainless steel, stainless steel coatings, steel, steel coatings, vinyl ester primer | Permalink
Posted by Norm Lambert
August 22, 2012
A technician who uses a non-Epoxy.com product to repair tombstones wrote me recently looking for help with problems that he was having. He goes on to say that the epoxy that he uses never fails, but rather the stone fails. When a secondary break occurs, the stone always re-breaks about 2 mm (about ¾ inch) above or below the epoxy joint. The epoxy attached to about 2 mm of the stone and holds well.
He asked me if the epoxy shrinks so much that it will ‘ pull away ‘ from the stone it’s attached to, and in his case, it pulls about 2mm of stone with it.
No I doubt it is epoxy shrinkage causing the problem. High quality epoxy has little or no shrinkage. It would have to be a very poor quality epoxy to be shrinking enough to do that.
The reason his epoxy is not working is that it is too rigid. His existing rigid material has a “high modulus of elasticity”. A material with “high modulus of elasticity” is a material that is stiff and/or rigid. A “low modulus of elasticity” material is semi-flexible, and is not rigid or brittle.
Smaller pieces of the stone structure (in this case a tombstone) and pieces not in touch with the ground tend to get hotter and cooler faster than the larger pieces and pieces with ground contact. This is called “differential timing of the event”. For example the top of a tombstone can be heated and cooled on 5 sides, the top and the 4 sides. The base of the tombstone which is buried in the ground has earth or stone on all of its surfaces. This earth and stone tends to keep the temperature of the base more stable by insulating it and slowing the change in temperature. This works much like the insulation in your house slows temperature changes inside your house.
When an object like a piece of stone is heated it expands (gets bigger). When an object cools it contracts (gets smaller). For example 100 feet of concrete will be 1 inch longer once it is heated 100 degrees F. That is why expansion joints are cut into concrete.
In the case of tombstones all the pieces of the same type of stone have very similar if not identical “coefficient of expansion”. Since the pieces are positioned with potentially different timing of heating and cooling there is a “differential timing of the event” (see above). The result is stress areas you are seeing in the closest weakened plane in the stone near the bond line.
Product #2005 was specifically designed for tombstone (monuments) and/or stone bonding, or repair. Epoxy.com Product #2005 is very strong yet it is has a “low modulus of elasticity” (semi-flexible). The low-modulus of elasticity helps to absorb differential movement (two sections of stone heating and cooling at different times), making it much less likely to cause a stress area in adjacent weakened planes.
Camouflage the bond line rubbing stone dust(ground off the original stone or a similar colored stone) into any exposed epoxy material while the epoxy is still “wet”. That way the dust will stick in the wet epoxy making the epoxy difficult to impossible to see.
Please send your additional question and blog ideas to firstname.lastname@example.org
Leave a Comment » | adhesive, bonding, crack isolation epoxy, Epoxy, flexible Epoxy Membrane, glue, Structural Repairs, Surface Preparation, tombstone repair | Tagged: adhesive, Bonding Systems, epoxy adhesive, epoxy adhesive stone repair, epoxy adhesive systems, epoxy bonding, epoxy bonding systems, epoxy glue, epoxy repair, epoxy stone repair, tombstone repair | Permalink
Posted by Norm Lambert