high quality frp mold gelcoat resin

liquid resin property

Notes:25℃ gel time testing:25℃ water bath, 50g resin filled with 0.9g T-8M(1%Co)and 0.9g M-50(Akzo-Nobel)  

casting body property

Notes: resin casting body property standard according to Q/320411 BES002-2014

Gelcoat is a resin system that is filled with colorants and thickening agents and applied to a mold surface to form the cosmetic and weathering coating of a composite part. Gel coat is typically the first layer of a part to be applied. Correct application of gelcoat is critical to get the optimum performance from it.

Gelcoats are based on a thermoset resin that requires an Initiator and proper temperatures to cure thoroughly.  Incomplete cure will result in poor durability of the gelcoat.  This is often witnessed as premature fading, dulling of the gelcoat surface, or chalking.  There are 3 variables that affect proper cure: temperature, film thickness, and initiator level.

Temperatures should be between 60-80 degrees F.  with an optimum range being between 70-75F.  We like to use an infrared thermometer to check the temperature of the mold surface and gelcoat.  We use the infrared and a wall thermometer to check ambient temperature of the workspace.  Keep in mind that molds stored in areas that are not climate controlled may not reach room temperature for quite some time.

Gelcoat should be initiated (catalyzed) to set up to the point that you can touch it with a glove and not have it come up on your finger in 45-60 minutes from application.  Generally speaking and depending on the temperature a Catalyst ratio of between 1.2% to 3% will give you the proper cure rate..  At 77F 1.8% MEKP will provide a gel time of 10-17 minutes. Keeping good notes will help you build a database of initiator levels for temperatures that you encounter frequently. Gelcoat that is over-initiated can result in excessive shrinking and premature release from the mold.

Our standard gelcoats are designed to cure in films as thin as 12mils (0.012 inches); however, we recommend that you apply them in coats of 18-20 mils to get the best cure, hide, and print block.  As the gelcoat cures, it develops heat that helps it complete the cure cycle. If your coating is too thin and the temperature is too low, it will not cure properly.  Gelcoat can be applied in coats up to 24mils.  For applications under the waterline a thickness of 20-24 mils aids in blister prevention and is better than thinner layers. Thicker layers are more prone to cracking under stress.

Styrene vapors will inhibit and slow the cure of gelcoat.  Because styrene is heavier than air it will pool at the bottom of a mold cavity and slow down the cure of the gelcoat located in the bottom or lower parts of a mold.  If you have the ability to do so, rotate the mold so that while the gelcoat is curing the styrene vapors can pour out of the mold.  If you do not have that ability, make sure to check low spots in the mold as well as high spots for the cure rate of the gelcoat.  Slow moving fans can also be used to move the styrene out of the mold cavity.

PACKAGE:20kg pails

STORAGE:maximum of 3 months under 25V in shade

TRANSPORTATION:according to the rule of dangerous good control and GB 190-90

Thousands Chemicals. is a well-known high-tech  enterprise in south China, specializing in chemical composite materials research and development, production, sales, trade as one of the company. The main products are vinyl preservative resin, Epoxy Resin, Unsaturated Polyester Resin (191 general glassfiber reinforced plastic, ship resin, auto parts resin, bathroom resin, mold resin,arts and crafts resin, imitation jade resin, high transparent resin, crystal resin and other resin reinforcement materials. 

1. Q: Is your company a manufacturer?

     A: Yes,we are. At the same time, we also agent other product brands.

2. Q:  Does your company provide samples?

     A:  Yes,we offer 1kg free sample but freight should be paied buyer. 

3. Q:What is your company's  transportation form?

     A: Samples usually deliver by  international express, large quantity goods can be shipped by land or water.

4: Q: What is the quality and price of your product?

     A: Our product have a good quality and stable performance, with a cheap price and high quality, there are a large number of  markets at home and abroad. Due to fluctuations in resin prices and it's not fixed so that the latest price have to ask customer service or contact us by e-mail. 

5. Q: What's the shelf time of the liquid unsaturated polyester resin?

    A: Normally is 90 days, but if  you add some The Accelerator ,it's 45 days.