Multi-purpose Putty Gallon

J-B Weld Multi-Purpose Putty will give you overall similar performance as other polyester putties, but will clog sandpaper less than other putties, and has extended working time.

Yes, J-B Weld Multi-Purpose Putty will work with any cream hardeners for polyester putties (also known as BPO cream hardener), and with any cream hardener colors (red, blue or white).

Lay down a bead of hardener across the diameter of the putty you have scooped out. If you want to weigh it, the ratio of putty to hardener is 50:1 by weight.

You should clean the surface with degreasing cleaner, then sand with 80 grit sandpaper (or lower), and then wipe clean with a solvent (such as acetone).

Multi-Purpose Putty will not work on low-surface-energy plastics, such as polyethylene and polypropylene. We also can't guarantee that Multi-Purpose Putty will work over painted surfaces, so we recommend sanding off paint before applying the putty to surface.

Likely because the surface preparation was not performed properly (see question about surface preparation above).

Pinholes result from trapped air, which comes from improper mixing of the putty, or from applying the putty too thick.

Adding too much cream hardener can cause the product to cure quickly. Additionally, heat and warm climates can accelerate the cure, so if the application environment is hot, expect the material to cure faster.

If the putty has not cured, use a putty knife or similar tool to scrape the filler from the surface. If the putty has cured, sand the putty down, and then use a heat gun to soften remaining material to scrap off with a putty knife or similar tool.

Yes

Between 50-80 degrees Fahrenheit. Store the putty indoors only.

We do not recommend thinning Multi-Purpose Putty down with any material.

No, Multi-Purpose Putty is not stain free.