Thickening Epoxy??

Re: Thickening Epoxy??

Keith Newton

Have you thought of cutting a wooden plug that pretty closely matches the part that you tore out, then just use what you have to fill in around and bond it into place? Otherwise sawdust or sanding dust, but adding almost anything else will make it heavier and more likely to sag than the lightweight colloidal silica which can be added up to peanut butter thickness without ruining it.

Otherwise drop me an email and I can offer more.

Bondo, available auto supply

I second the Bondo

TJD Edmonton

The stuff sticks well to wood is hard, sands well and takes paint well. It's also cheaper then West Systems.

Get waterproof Bondo

Ken Vaughan

General purpose attracts/holds moisture. Not good for exterior rot replacement

Waterproof is good exterior and lasts.

You need not pay the price of education that I paid.

Re: Thickening Epoxy??

Tom Norton

Keith, thanks for the idea of using solid wood as a "filler". That will!

Re: Thickening Epoxy??

Barry Irby

I have repaired lots of rotted exterior trim. Where I could I cut away the rot and replaced it with rot resistant wood. Also use Epoxy and Bondo. Use the waterproof type.

Before you replace anything, soak the area thoroughly with a wood hardener type of epoxy. The stuff is thinner that water and will soak in far past what you think is sound. It may encapsulate any remaining rot or fungi and keep the water away, letting it die of thirst. I also drill into the wood and install Bor-8 Rods. If water finds its way in they will disolve and treat the wood from the inside out with borate. I might even soak everything with BoraCare. I keep some on had for such jobs.

I am about to replace a front door for my son's girl friend and have bought Bor8 rods for the job. Tried to tell her to buy a rot resistant frame, but she did not listen.

Re: Get waterproof Bondo

Tom Norton

I checked out the Waterproof Bondo while I was at the hardware store. It seems that it is for use with fiberglass cloth and not really a "putty" type filler. But I did get a recommendation for Woodepox from A strong.

Bondo Glass Short Strand fiberglass

Ken Vaughan

Checked the label on the waterproof container in the garage. Good for most any material (wood, concrete, metal, fiberglass)