5 Key Points on Laminating Epoxy Resin

We can guess that you have used Epoxy before, if not, more than likely you have seen furniture, an object or project with epoxy on it. Now, Epoxy is not the same as Polyester and Vinylester due to its chemical properties. Another difference is, Polyester and Vinylester uses the same hardener and as a result, the appearance between the two are similar, while epoxy tends to have a slight yellow or amber appearance. 125463There are many different categories of epoxy, so today we will highlight one of them; laminating epoxy.

1) The laminating system cures to a high strength moisture resistant plastic, with good physical properties.

2) The ratio is well suited for use with high-solids marine, maintenance coating and bonding agents.

3) The cure time is three days in the sun or a week if it is not. Set time changes with activator and film thickness.

4) If there is an excessive amount of activator applied , the laminating epoxy will be soft and rubbery. In contrast, if there is not enough activator, the epoxy will not cure hard.

5) The epoxy cures faster in high temperatures in thick layer applications.

Please note: additional recoating of this material is thoroughly cured. If the product has cured hard and tack-free, a light sanding and solvent wash is advisable before recoating.

 

Tech Tip: Let’s talk Catalyst

Catalyst is an essential element to most processes in our business. Without the catalyst, no chemical reaction takes place and you might as well just pour water over your fiberglass or table. You would think catalyst would be an easy product to work with, and sometimes you are right, but you have to follow the directions exactly. It’s not pretty when you don’t (trust me).

catalystMEK-P or Methyl Ethyl Keytone Peroxide, not to be confused with Methyl Ethyl Ketone, a solvent, MEK-P is one of the most common catalysts. MEK-P is used for polyster and vinylester style resins. It is very specific on ratios and requires the most attention.

Vinylesters require a hotter catalyst we sell, called Norox 925, sometimes referred to as “High-Point 90.” It’s a hotter catalyst that works better for the Vinylester. You will also see Vinylester requires a ratio of 2% by volume, as opposed to gelcoats and resin which are closer to 1.5%.

catalyst chart small

Gelcoat and Polyester resin, including Boatyard use a standard catalyst, or the 925 catalyst. These resins only require about 1.5% catalyst and are quite specific on the ratios, especially in hot weather. You will also use the same ratio’s for Polyester-based putty, like our OEM Super Poly Fill, or our gelcoat putty.

B.P.O. or Benzoyl Peroxide is a cream hardener that is used for most Auto Body and Bondo-like putties. It’s a bit easier and more forgiving on the mixture and comes in Red, White and Blue. The ratio is 1-1 oz tube per quart, or a 4 oz tube per gallon.

epoxyEpoxy activators are all proprietary, depending on the product. They range from a 1:1 ratio, like with our Table Top Epoxy, to our standard laminating epoxy allowing a 1:1, 2:1, 3:1, 4:1 and 5:1, allowing for different ratios that effect hardness and gel time. With different ratios, the higher the ratio, the quicker the pot time and the harder the epoxy.

 

With all these activators, sticking to the ratio is key, so if you were planning on eye-balling it, may I suggest picking up a couple of mixing buckets, or a squeeze bottle and take the guessing out of the equation.

5 Tips for Using Vinylester Resin

Vinylester-Resin-Kit1. Vinylester Resin requires 2% MEK-P every time it is used in order to cure properly.
2. The maximum heat temperature is 220°F.
3. This product can be used to help gelcoat bond with epoxy.
4. The ideal temperature is at 77°F. Best results for this product can be obtained at temperatures between 70°F and 85°F, in a clean, dry, dust-free environment.
5. Do not go over 1/8” in thickness. More than 1/8” in thickness will generate too much heat.

Do It Best 2014 – $1,000 Shopping Giveaway Winner Interview: Kathryn Boshell

Congratulations to Kathryn Boshell for being the winner of our Do It Best 2014 – $1,000 Spring Merchandise Giveaway.

She resides in Sunrise, Florida and normally shops at our Fort Lauderdale location.

 FGCI 030

  1. Have you won any giveaways before?
I won a turkey at the fairgrounds once, but nothing like this.

2. What products did you decide to choose for this giveaway?
I choose a swing set for my granddaughter.

3. How often do you shop at Fiberglass Coatings?
What makes you a repeat customer?
I shop at Fiberglass Coatings about once a week.
The staff is what makes me come back.

4. What products do you normally buy from Fiberglass Coatings?
Can you tell us a specific product/products you buy and what you use them for?
I usually purchase vinylester resin in pails. I use the resin for boat repairs.

 5. Will you be signing up for our fall merchandise giveaway?
Oh yes, I will be!

winner 001

We have shopping giveaways every fall and spring.
Be sure to sign up while you are in store!

SpringGiveaway3

We have two locations: one in St. Petersburg, FL and one in Ft. Lauderdale, FL.
We also have web presence at www.fgci.com and are featured on E-Bay and Amazon.
Our toll free number is 1-800-272-7890.