Best Car Putty & Polyester Resin of 2025

Joseph Prokop Avatar
Joseph Prokop
Last Updated: 8 Feb 2025

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Car putty and polyester resin are essential products for any car owner or mechanic. Car putty is used to fill in small dents, scratches, or imperfections on a car's bodywork, while polyester resin is used to stabilise and reinforce damaged areas. Both products are easy to apply and provide a long-lasting solution to keep your car looking its best. Whether you want to repair minor damage or stabilise a larger area, car putty and polyester resin are great products to consider.

At a Glance: Our Top Picks

isopon Fastglas Glass Fibre Repair Kit Cover #TOP 1
isopon Fastglas Glass Fibre Repair Kit
ftb score rating icon 9.9
Swindon Composite Supplies Fibreglass Repair Kit Cover #TOP 2
Swindon Composite Supplies Fibreglass Repair Kit
ftb score rating icon 9.8
Swindon Watersports Fibreglass Resin Kit Cover #TOP 3
Swindon Watersports Fibreglass Resin Kit
ftb score rating icon 9.6

Top 10 Car Putty & Polyester Resin

#TOP 1

isopon Fastglas Glass Fibre Repair Kit

GL/LA/D
isopon Fastglas Glass Fibre Repair Kit Cover
isopon Fastglas Glass Fibre Repair Large Kit

The isopon Fastglas Repair Kit offers a straightforward solution for quick repairs. By simply wetting the glass fibre mat with activated resin, you can create a durable glass fibre reinforced plastic. This material bonds effectively to most surfaces and dries within 20 to 30 minutes, ensuring a strong hold that retains its shape over time. With easy-to-follow instructions, you can achieve professional results without the hassle, making it perfect for your repair needs.

What We Like
Quick drying time
Strong bond to various materials
Easy to use
Durable repair solution
#TOP 2

Swindon Composite Supplies Fibreglass Repair Kit

FG repair-250g
Brown
Small ( 250g )
Swindon Composite Supplies Fibreglass Repair Kit Cover
Swindon Composite Supplies : Fibreglass Repair Kit 250g - Resin,Hardener & Fibreglass - Supplied with Accessories- Professional Standard Lloyds Approved

The Swindon Fibreglass Repair Kit is perfect for small repairs and projects, featuring 250g of resin and 95 x 25cm glass fibre matting. This kit is Lloyds approved, ensuring it meets the standards required for marine craft repairs, giving you peace of mind. Accurate mixing is crucial for success; therefore, weighing the resin helps you determine the correct amount of hardener to use. With a working time of approximately 15-20 minutes, you can efficiently complete your repairs before the resin sets.

What We Like
Includes essential repair accessories
Lloyds approved for marine use
Quick working time
Accurate mixing for best results
Compact size for small projects
#TOP 3

Swindon Watersports Fibreglass Resin Kit

Encore30-1kg
Brown
1000g
Swindon Watersports Fibreglass Resin Kit Cover
Swindon Watersports Polyester Resin Kit, Fibreglass Resin -Inc Hardener, Lloyds, Pro Quality Encore 30, H13212 TAE (1000g)

The Swindon Composite Resin offers a high-quality polyester resin that is Lloyds Approved for marine craft, ensuring it meets essential insurance requirements. Supplied with a hardener and syringe, it allows you to mix at the recommended ratio of 2%, making the application straightforward. This professional-grade ENCORE 30 Resin is preferred by boat builders, providing excellent results for fibreglass repairs and wet lay-ups. It is optimised for use with fibreglass matting, giving you confidence in your repairs and projects.

What We Like
Lloyds approved quality
Includes hardener and syringe
Professional-grade resin
Optimised for fibreglass repairs
#TOP 4

U-POL Easy ONE Lightweight Body Filler, 3L

EASY/7
Grey
U-POL Easy ONE Lightweight Body Filler, 3L Cover
UPol EASY/7 Easy One Super Easy Sanding Lightweight Body Filler, 3 Liter, Tin Grey

The U-POL Easy ONE Filler is an incredibly lightweight body filler that makes your car repair tasks much easier. Its excellent filling properties ensure a smooth finish, saving you time and effort. This premium product is highly regarded in the UK, known for its reliability and effectiveness. As the UK's top hand and power tool seller, you can trust that this body filler meets high standards, offering you the best results for your automotive needs.

What We Like
Extremely lightweight
Excellent filling properties
Premium quality
Trusted UK brand
#TOP 5

isopon Upol GL//D Glass Fibre Repair Kit

GL/SM/D
isopon Upol GL//D Glass Fibre Repair Kit Cover
isopon Upol GL//D Fastglas Glass Fibre Kit, S Size

The isopon Glass Fibre Kit is a complete solution for creating, constructing, and repairing with Glass Reinforced Plastic (GRP). It includes opaque polyester resin, a red BPO paste hardener, and glass fibre matting, allowing you to achieve strong and durable results. With its fast curing resin formulation, you can complete your projects quickly, saving you valuable time. The kit contains everything you need, including 250ml of resin, making it convenient for both novice and experienced users to tackle various repair tasks with ease.

What We Like
Complete repair solution
Fast curing resin
Includes essential components
Easy to use
#TOP 6

Swindon Composite Fibreglass Repair Kit

FG Rep-glass-1kg
Brown
Med 1kg
Swindon Composite Fibreglass Repair Kit Cover
Swindon Composite Supplies : Fibreglass Repair Kit - Polyester Resin 1.0kg - 1 Sq M of Fibreglass Matt, Lloyds Approved

The Swindon Composite Repair Kit is designed for fibreglass repairs and wet lay-ups, featuring 1.0kg of Lloyds approved polyester resin. It includes a generous 1m x 0.95m fibreglass mat that makes it easy for you to cover larger areas efficiently. The kit also comes with essential tools such as mixing sticks, disposable brushes, and a syringe for precise measuring of the hardener, ensuring that you achieve the perfect mix. However, be aware that the resin has a powerful smell, which is typical for polyester products.

What We Like
Lloyds approved polyester resin
Includes essential mixing tools
Generous fibreglass mat size
Suitable for various repairs
#TOP 7

Swindon Composite MEKP Hardener for Polyester Resin

MEKP 100ml
Clear
Small
Swindon Composite MEKP Hardener for Polyester Resin Cover
Swindon Composite Supplies : MEKP Hardener activator for Polyester Resin gelcoat and Topcoat Products (100ml)

The Swindon Composite MEKP Hardener is designed for use with polyester resin gelcoat and topcoat products. With 100g of hardener, you can effectively mix it with approximately 5kg of resin at a 2% ratio, making your projects more efficient. This catalyst allows you to adjust the mix ratio between 1 and 3% depending on your desired pot-life and cure speed, offering flexibility to suit your needs. However, it is crucial to test compatibility with other resins to ensure optimal results and avoid issues.

What We Like
Compatible with polyester resin
Flexible mix ratio options
Sufficient for large projects
Guidelines for safe use
#TOP 8

Swindon Composite Supplies Polyester Resin Kit 5kg

Encore30-5kg
Brown
Swindon Composite Supplies Polyester Resin Kit 5kg Cover
Swindon Composite Supplies - Polyester Resin Kit 5kg -Inc Hardener, Lloyds -Pro Quality Encore 30, H13212 TAE

The Swindon Polyester Resin Kit is a professional quality product, approved by LLOYDS and known as ENCORE 30. It's ideal for fibreglass and GRP repairs, making it perfect for use with fibreglass matting and roofs. The kit comes with a 5kg can of resin and 100g of MEKP hardener, providing you with everything you need for effective repairs. However, be aware that the resin has a strong smell, so it’s best to use it in a well-ventilated area.

What We Like
Professional quality resin
Suitable for fibreglass repairs
Includes MEKP hardener
5kg size for larger projects
Well-suited for roofs
#TOP 9

E-TECH Plastic Bumper Repair Putty 250G

ER00101-ET
Matt Dark Grey
250G
E-TECH Plastic Bumper Repair Putty 250G Cover
E-TECH Plastic Car Bumper and Trim Repair Putty - ER00101 - (Perfect repair solution for cracked, split and holed plastic bumpers and trim) 250G

The E-TECH Repair Putty is an ideal solution for fixing cracked, split, or holed plastic bumpers and trims. Its excellent adhesion ensures that it strongly bonds to the original bumper, giving you peace of mind. The ultra-fine formula eliminates air bubbles, resulting in a smooth finish that enhances the appearance of your vehicle. Additionally, the putty is easy to sand and shape, allowing you to restore your bumper's original contours effortlessly. With its good flexibility and fast setting properties, you can enjoy a quick and effective repair process.

What We Like
Strong adhesion to bumpers
Smooth finish without air bubbles
Easy to sand and shape
Good flexibility
Fast setting time
#TOP 10

Polycraft 10Kg Fibreglass Repair Kit with Mat

5060202515554
Original
10kg
Polycraft 10Kg Fibreglass Repair Kit with Mat Cover
Polycraft 10Kg Fibreglass Repair Kit. Includes Resin & Mat…

The Polycraft Fibreglass Repair Kit offers a comprehensive solution for your boat and marine repairs. With 10kg of high-quality polyester resin, you have plenty of material to work with, ensuring strong and durable results. The included catalyst and syringe make mixing and application straightforward, saving you time and effort. Additionally, the 10m x 1m 450gsm chopped strand mat provides excellent reinforcement, enhancing the strength of your repairs and making them long-lasting. This kit is ideal for anyone looking to restore their marine equipment effectively.

What We Like
High-quality resin included
Easy mixing with syringe
Large mat for strong repairs
Ideal for boat repairs
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What is polyester putty used for?

This general-purpose marine repair putty can be used to join and fillet fiber-reinforced plastic parts, and bond dissimilar materials such as metal and wood. In addition to bonding, Polyester Repair Putty can be used for filling gaps, holes, and cracks in composites, radius forming, and fabricating composite parts.

2. What is the mixing ratio of polyester putty and hardener?

What is the mixing ratio? Mix the putty with 2 to 3% hardener. If in doubt, use a scale during mixing. Mix carefully and avoid withdrawing air during mixing.

3. Is epoxy and polyester resin the same?

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.

4. Is epoxy stronger than 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.

Editor's Notes

During our car putty & polyester resin research, we found 95 car putty & polyester resin products and shortlisted 10 quality products. We collected and analyzed 15,797 customer reviews through our big data system to write the car putty & polyester resin list. We found that most customers choose car putty & polyester resin with an average price of £18.52.

The car putty & polyester resin are available for purchase. We have researched hundreds of brands and picked the top brands of car putty & polyester resin, including isopon, Swindon Composite Supplies, U-POL, E-TECH, Polycraft ( MB Fibreglass ). The seller of top 1 product has received honest feedback from 9,337 consumers with an average rating of 4.7.

Written by
Joseph Prokop Avatar

Joseph is a seasoned writer who's also passionate about automotive. His passion for automotive care and maintenance fuels his drive for more knowledge in the field. He currently resides in Middlesbrough, where he finds time to write informative contents on automotive. His automotive related articles are quite popular in journals around the world. Joseph continues to use his wealth of experience in the industry to create helpful guides on automotive.