Is Bondo glasvezelhars epoxy of polyester?

Is Bondo a polyester?

As a brand of 3M, Bondo® is well known among boat manufacturers and collision repair professionals. This polyester resin is another way that 3M applies science to life, and helps you restore and maintain the beauty and value of your cars, boats and other possessions in and around the home or shop.

Is epoxy the same as polyester?

Polyester is an adequate adhesive but not as good as epoxy. As a general rule, the tensile strength of a polyester bond will be around 20 percent weaker than the same bond made with epoxy. That makes epoxy resin usually the best choice for fiberglass repair work.

What type of resin is Bondo?

All-Purpose Fiberglass Resin

Bondo® All-Purpose Fiberglass Resin is suitable for a range of repairs and improvement projects inside and outside of the home and garage. Part of a brand that is well-known for auto repair, this fiberglass resin works with fiberglass, wood, concrete and more.

Is Bondo the same as epoxy?

Bondo is a trade name for a common automotive filler that is polyester resin and typically talc. The Bondo name is used like Kleenex to refer to any mix of polyester filler. Epoxy is not polyester. Both are excellent for use as filling agents with wood.

What epoxy is used for fiberglass?

WEST SYSTEM epoxy is the better choice for repairing fiberglass boats. It has excellent adhesive qualities, wets out fiberglass fabrics and it is tough. It has great thin film cure characteristics, cures in cool temperatures and has a long shelf life.

Is fiberglass resin and polyester resin the same?

Fiberglass is a type of glass mat and is obtainable in various structures. Polyester resin is used to saturate the mat or cloth, it then becomes polyester fiberglass resin. Epoxy resin can also be used in this way, but over time polyester resin has somehow gained the title of fiberglass resin.

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’s the difference between epoxy resin and fiberglass resin?

The key difference between epoxy and fiberglass resin is that epoxy resins are made mainly from the reaction between epichlorohydrin and bisphenol A, whereas fiberglass resin is made from the combination of alcohols and organic acids.

Can you use epoxy over polyester resin?

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.

What is better Bondo or epoxy?

The epoxy product that I have used (Abatron) is worth the extra if for no other reason that it sands more like the wood, whereas Bondo is much harder than the wood and will tend to stand proud of the surrounding areas if you’re not careful when sanding.

What is polyester filler?

Two part polyester wood filler works well as an all purpose filler. It can be used as a surfacing compound to fill shallow scratches or nail holes. Unlike wood putty, polyester filler dries hard so it can be sanded to match the profile of the surrounding wood.

Is polyester a resin?

Polyester resin is a low viscosity resin that is made from a chemical reaction of a diacid and an alcohol. Sheet molding compound (SMC) is a combination of polyester resin, glass fiber, calcium carbonate, and additives. Polyesters with glass fibers have good tensile strength and modulus.

What is polyester fiberglass?

Polyester is often referred to as fiberglass – which is not technically accurate. Fiberglass is reinforcement and polyester is the resin. Polyesters offer ease of handling, low cost, dimensional stability, as well as good mechanical, chemical-resistance and electrical properties.

What is unsaturated polyester resin?

Unsaturated polyester resin is one of the most popular thermoset polymers for use as a matrix in composites for applications in the marine and aerospace industries because of its unique properties such as high strength and modulus, high resistance to water, room temperature cure capability, and transparency.

Is polyester resin porous?

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.