Does polyester resin need hardener?
Polyester resin requires MEKP hardener. Needed Supplies (this will vary depending on your project): MEKP (methyl ethyl ketone peroxide) is required.
Can you use epoxy hardener with polyester resin?
Once cured, polyester resin is water permeable, meaning water can pass through it eventually. The bonding strength of polyester resin is generally less than 500 psi. Polyester resin will not bond to epoxy resin.
What is the catalyst for polyester resin?
Methyl Ethyl Ketone Peroxide
MEKP (Methyl Ethyl Ketone Peroxide) is the catalyst added to polyester resins and vinyl ester resins. As the catalyst mixes with the resin, a chemical reaction occurs, creating heat which cures (hardens) the resin. Use approximately 1/2 oz per quart of resin.
Will fiberglass resin harden without hardener?
Well no, it won’t harden. It might eventually go dry and crusty, but that depends on the resin, and it would be super brittle in that state anyway.
How much hardener do you add to polyester resin?
DIRECTIONS FOR POLYESTER HARDENER POLYESTER RESIN/GELCOAT IS CATALYZED WITH MEKP (METHYL ETHYL KETONE PEROXIDE). THE RATIO IS APPROXIMATELY ONE OUNCE OF HARDENER PER GALLON OF RESIN.
What is stronger epoxy or polyester resin?
An epoxy’s relative strength can hold up to 2,000 lbs. per square inch, while a polyester resin can hold less than 500 lbs. per square inch. Epoxy is more resistant to wearing, cracking and peeling, and corrosion or damage from chemical or environmental degradation.
Is epoxy resin better than polyester resin?
Epoxy resin has very good adhesive properties, has good chemical resistance and offers some comfort while you use it (less fumes). However, polyester resin, often more than 3 times cheaper, fits most day to day general DIY jobs and using epoxy may be overkill.
What can be used as hardener for fiberglass resin?
A secret: for common repairs around the home or shop, our well-known Bondo® products such as Bondo® Fiberglass Resin and Bondo® Metal Reinforced Filler are only as good as the hardener you use with them….Bringing Science to the Art of Auto Body Repair.
| Attribute Name | Value |
|---|---|
| Volume (Imperial) | 0.74 fl oz |
How much hardener do I put in polyester resin?
How much hardener do you put in fiberglass resin?
Add 14 drops of liquid hardener per 1 oz. of Fiberglass Resin (or for ¼ can of Fiberglass Resin, use ¼ tube of liquid hardener).
What happens if I don’t put enough hardener in my fiberglass resin?
There are few things worse than having finished a large project using fiberglass, only to not have it fully cure. You let it sit, and sit, and sit, but it never completely hardens. Chances are you did not add enough catalyst, the chemical that hardens the resin.