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Epoxy over polyester is ok, as long as the polyester gets sanded first. Anything epoxy is not going to be cheap. Anything epoxy with a sandable filler is going to be even less cheap.
Can polyester resin be used with epoxy resin?
While epoxy adheres tenaciously to cured polyester, the reverse is not true, so the bond between an epoxy repair and an overcoat of polyester gelcoat will not be strong. Use polyester for repairs that will be gelcoated.
Can you mix polyester and epoxy?
We know polyester gelcoat can be used over WEST SYSTEM Epoxy. Polyester materials can be affected by amines in the epoxy hardener. If the hardener has not fully reacted with the epoxy resin or the amine blush is not removed from the cured surface, problems can occur.
What is better epoxy or polyester resin?
Epoxy is more resistant to wearing, cracking and peeling, and corrosion or damage from chemical or environmental degradation. Polyester is more fragile and useful for temporary fixes, or low-stress use. Epoxy is generally more expensive than resin, due to its strength and formulation requirements.
What can I use to color polyester resin?
Acrylic paint offers an inexpensive, readily available alternative. Pour the casting resin into a clear plastic cup. Add the catalyst to the resin according to the package directions. Scoop out a small portion of acrylic paint with a craft stick. Stir for 15 seconds to mix the paint into the resin.
What is the difference between polyester resin and vinyl ester resin?
Vinyl esters are more tolerant of stretching than polyesters. This makes them more able to absorb impact without damage. The cross bonding of vinyl esters is superior to that of polyesters. This means that vinyl esters bond to core materials much more effectively than polyesters and delamination is less of an issue.
Are epoxy and resin the same thing?
The most noticeable difference between these two compounds is their intended use. The Epoxy Coating Resin is intended for coating surface applications, while the Casting Resin is used mainly for jewelry, molds or figurines.
How can you tell epoxy from polyester?
The disadvantage is that epoxy resin will yellow out a bit quicker than polyester resin. Although polyester resin also gets really yellow. Epoxy is just like a little off-white or not as clear as polyester resin when the board is new.
How much Mekp is polyester resin?
POLYESTER RESIN/GELCOAT IS CATALYZED WITH MEKP (METHYL ETHYL KETONE PEROXIDE). THE RATIO IS APPROXIMATELY ONE OUNCE OF HARDENER PER GALLON OF RESIN.
How can you tell the difference between polyester and epoxy resin?
Polyester Resin vs Epoxy Resin Polyester resin is produced by free-radical polymerization. Epoxy resin is produced by condensation polymerization. Polyester resins are less likely to be used in high thermal applications. Epoxy resins are more likely to be used in high thermal applications. Glass Transition Temperature.
Why is casting resin so expensive?
Epoxy resins are more expensive to produce than other types of resins. This is because the raw materials required for manufacture cost a lot more than other low-end resins and the process of the production is complicated with a low tolerance for errors.
Does polyester resin go bad?
Those who have used polyester resins know that its shelf life is only about six months before it turns to a useless jelly-like substance. An abundance of expired material can easily cancel the initial cost savings of cheaper materials. With proper storage, resin and hardeners should remain usable for many years.
What is the difference between UV resin and epoxy?
Epoxy resin cures without any aids, UV resin only cures under UV irradiation. Its maximum layer thickness is 1mm. Epoxy resin allows layer thickness of up to 5cm per casting, on the other hand. UV resin always requires a UV lamp to cure and is therefore only suitable for smaller areas.
What can I use to color my resin?
To color resin, use acrylic paint, mica powder, makeup (such as eyeshadow) resin tint and glitter. When coloring resin, you should never exceed 10% colorant to resin ratio and the best resin color results come when you add 5-6% color to resin.
Can you mix acrylic paint with polyester resin?
You can mix acrylic paint in epoxy resin in order to color it but you should stick to a ratio of 1:10 (1 part acrylic paint to 10 parts of epoxy resin). This ratio will ensure that the epoxy resin still drys hard and adheres well enough while enough paint can be added to effectively color the resin.
Can you use mica powder in polyester resin?
Mica powder is easy to blend into low-viscosity epoxy, urethane, and polyester resins. Before mixing mica powder into any two-part resins, be sure to read the manufacturer’s directions first because not all resins are alike when it comes to mixing in tints, pigments, dispersions, and dyes.
Can you put polyester resin over vinyl ester resin?
Polyester doesn’t bond well to much of anything, including mechanically to itself. Polyester will bond sufficiently to vinylester, if the tabbing overlap is generous.
Is vinyl ester resin stronger than polyester?
Vinyl ester resins actually exceed both polyester and epoxy in corrosion resistance, temperature resistance, and elongation (toughness). Because of this, they are typically used when high durability, thermal stability, and extremely high corrosion resistance are needed.
What is the difference between laminating resin and sanding resin?
The UV laminating and sanding work the same as standard resin; ie: laminating dries tacky and sanding dries hard with a wax coating. UV sanding resin should stand on the repair surface for a few minutes before UV exposure; this gives the wax time to float to the surface.
Can I use epoxy instead of resin?
Technically, there is no difference because epoxy is a resin. However, there are three different resins commonly deployed in DIY projects: epoxy resin, casting resin, and polyester resin, each with unique properties. Also important to note, epoxy resin and epoxy glue are different products.
What is the difference between epoxy resin and acrylic resin?
Acrylic resin (but not acrylic emulsion, which is the basis of acrylic paint) is a thermoplastic, which means it is one of a group of plastics which can be heated and manipulated repeatedly, whereas polyester resin and epoxy are thermosetting plastics, which use heat or a catalyst to solidify into a solid mass that won.
Can you use epoxy glue as resin?
The epoxy adhesive is used mainly for pre-treated and painted metals or composite materials. Just like the application of casting resin, the epoxy resin adhesive consists of resin and hardener, which are brought together in an exact mixing ratio.
