Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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Epoxy floor coating Q&A's
Q. We are manufacturing epoxy floor coating systems using 100% solvent free Bisphenol A and cycloaliphatic amine curing agent. I have some peculiar problems faced at various sites and the problems are inconsistent in nature even though the formulation is the same.
We used a 22000 CPS epoxy resin with curing agent and made a seal coat to cover porosity in epoxy screed mortar base. The first seal coat filled up in the gaps and was very strong and hard. It achieved full curing (touch dry) in 3 hours. Later when we put the same material on top we found that it started delaminating after 7 days.
I understand that this could be because of early curing of sealer? Please advise.
Epoxy floor mfgr. - Pune, Maharashtra, India
2007
A. How old was the concrete. Did you acid etch and rinse well and dry well?
James Watts- Navarre, Florida
2007
A. Yes, this is normal, although the curing seems too rapid. For molecular bonding between coats, the second coat must be applied before the first coat has fully hardened. The first coat is typically dry to the touch but thumbnail dentable (perhaps even slightly tacky as '100% solids' have no solvent to evaporate). If the first coat has cured hard, it must be sanded or abrasive blasted to allow some mechanical adhesion.
Each epoxy has a recoating 'window' (minimum & maximum time interval) which decreases as temperature increases. A typical formulation might allow recoating between 8 and 48 hours from initial coating. As the manufacturer, you must determine proper recoating times at various temperatures for your customers.
- Goleta, California
Finishing.com honored Ken for his countless carefully researched responses. He passed away May 14, 2015.Rest in peace, Ken. Thank you for your hard work which the finishing world, and we at finishing.com, continue to benefit from.
2007
Finishing between epoxy floor and compact laminate walls in cleanroom
RFQ: We are working on a project of Parenteral Solutions Production Plant located in Turkey. The problem that we are trying to solve is the finishing detail between compact laminate partition walls and epoxy coated floors in the cleanroom areas. I would appreciate if anyone can give information about the type or manufacturer of the product that we can use to solve this problem.
GOKER SONMEZConstruction - ISTANBUL, TURKEY
2004
Ed. note: Sorry, this RFQ is old & outdated, so contact info is no longer available. However, if you feel that something technical should be said in reply, please post it; no public commercial suggestions please ( huh? why?)
Polyurethane floors better than epoxy?
RFQ: Dear sir,
Its nice to visit your website. We are a leading manufacturer and applicator for epoxy floor protection coatings for various industries in south India. We have an annual turn over of Rs. 4 crores from the floor coatings and allied business.
It is our observation that the market needs a different system with much better gloss and look than that of epoxy. We have solvent and solvent-less based systems to cater the different needs of the industry.
If you can help us by providing some formulations and directions to process the polyurethane solvent based and solvent less systems, I can assure a big volume of business by purchasing your products.
thanks,
Industrial floor coating - Thrissur, Kerala, India
2006
Ed. note: Sorry, this RFQ is old & outdated, so contact info is no longer available. However, if you feel that something technical should be said in reply, please post it; no public commercial suggestions please ( huh? why?)
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