Frequently Asked Questions
Everything you need to know about Dura-Fix products, ordering, application, and wood repair.
Products
What is Dura-Fix?
Dura-Fix is a professional-grade flexible epoxy wood filler designed to repair, rebuild, and restore damaged wood. Unlike traditional fillers, it remains flexible after curing, allowing it to move naturally with wood as temperatures and humidity change.
What makes Dura-Fix different from traditional wood fillers?
Traditional fillers often become brittle over time, leading to cracks and repair failure. Dura-Fix is engineered to remain flexible while providing excellent structural strength for long-lasting repairs.
What types of repairs can I use Dura-Fix for?
Dura-Fix is suitable for repairing:
- Rotten wood
- Cracks
- Chips
- Gouges
- Window frames
- Doors
- Trim
- Columns
- Decks
- Exterior architectural woodwork
Can I use Dura-Fix indoors and outdoors?
Yes. Dura-Fix is designed for both interior and exterior applications and is formulated to withstand moisture, temperature changes, and seasonal wood movement.
Application
How long does Dura-Fix take to cure?
The curing time depends on temperature and conditions. Most applications can be sanded after approximately 8–12 hours, while full cure is typically achieved within about 24 hours.
Can I sand, drill, or paint Dura-Fix?
Yes. Once cured, Dura-Fix can be:
- Sanded
- Drilled
- Machined
- Painted
- Stained
just like natural wood.
Can I stain DURA-FIX to match natural wood?
Yes. DURA-FIX can be stained in two ways:
- Mix a small amount of universal colorant into the material before application.
- After DURA-FIX has cured, sand the surface and apply a semi-transparent stain, also known as a varnish stain.
Does DURA-FIX shrink or crack?
No. DURA-FIX is designed not to shrink, slump, sag, crack, or crumble. It remains flexible after curing to accommodate the natural movement of wood.
Can it fill large voids?
Yes. One 450ml dual cartridge provides enough material to fill approximately 27 cubic inches, or about a softball-sized void.
Do I need an epoxy consolidant or primer?
No. DURA-FIX does not require an epoxy consolidant or pre-treatment. Remove all decayed and damaged wood until clean, sound wood is exposed before applying DURA-FIX.
Does Dura-Fix shrink or crack?
No. Dura-Fix is formulated to resist shrinking, slumping, sagging, and cracking after curing, helping repairs remain stable over time.
Can it fill large voids?
Yes. Dura-Fix can fill large gaps and damaged areas while providing structural reinforcement when used correctly.
Orders & Support
Where can I purchase Dura-Fix?
Dura-Fix is available through the Next Generation Systems online store, Amazon, and authorized retail stores.
Visit our Retail Locations page to find a store near you.
Do you offer contractor training?
We provide professional contractor training programs covering wood assessment, repair techniques, product application, and certification.
How can I contact your team?
You can reach our team for product recommendations, technical support, contractor training information, or general inquiries.
Email: john@nxtgensys.com
Phone: 888-370-5420
Business Hours: Monday–Friday, 8:00 AM–5:00 PM
How long does it take to ship my order?
Most orders ship within 1–3 business days via UPS. View our Shipping & Return Policy →
How do I start a return?
Contact us to request a Return Authorization Number before sending anything back. View our Shipping & Return Policy →
Choosing the Right Product
What's the difference between the Two-in-One Cartridge and the Dual Cartridge?
Two-in-One Cartridge
- Fits a standard caulking gun
- Ideal for homeowners and DIY repairs
- 150 ml
Dual Cartridge
- Requires a dispensing gun
- Designed for contractors and frequent repairs
- 450 ml
Both use the same Dura-Fix repair technology—the main difference is capacity and dispensing method.
Which formula should I choose?
Choose based on your working environment:
- Warm Weather Formula – Best for higher temperatures.
- Cold Weather Formula – Designed for applications between approximately 40°F and 70°F (4°C–21°C).
Will my existing dispensing gun work with the DURA-FIX cartridge?
There’s a good chance it will. If you have a dispensing gun from John’s earlier epoxy company, it will be compatible with DURA-FIX.
Will my existing dispensing gun work with the DURA-FIX cartridge?
In short, There’s a good chance it will. It definitely will if you have a dispensing gun from John’s earlier epoxy company. Here are a few tips to help you out:
First check and make sure your gun is set-up for a 2:1 ratio
The over all length of the cartridge cradle should be approximately 8 3/4”
The over all width of cartridge cradle should be approximately 4”
