SKU: 8237

PLASTICWELD EPOXY PUTTY - 2 OZ

$7.99

Attributes

Water Resistant
Oil Resistant
Sandable
Drillable

Use On

Plastic
Fiberglass

Product Details

J-B Weld PlasticWeld is a hand-mixable, fast-setting epoxy putty designed for strong, permanent repairs on most plastics. It forms a durable bond that can be molded and used to build up or recreate missing pieces. It has a 25-minute work time and a functional cure of just 3 hours. It is rated to withstand temperatures up to 300°F and cures to an off-white color. When cured, it can be sawed, drilled, carved, sanded, and painted. Note: Not recommended for polyethylene or polypropylene plastics.

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Product Attributes

Strength
700 PSI
Set Time
25 Minutes
Cure Time
3 Hours
Dry Color
Off White

Surfaces

Plastic
Fiberglass

How to Use

Cut

Remove required amount of putty.

Mix

Thoroughly knead putty with fingers to a uniform color.

Apply

Press putty firmly to the surface to be repaired.

Frequently Asked Questions

Which plastics does PlasticWeld bond to, and which will it not?

PlasticWeld bonds to most major plastic types, including PVC, ABS, polycarbonate, acetal such as Delrin, polystyrene, polyurethane, fiberglass and composites. It will not bond to polyethylene, including HDPE, or to polypropylene, and no commercial epoxy will. Sand or scuff the surface and clean it with acetone before applying. If you are unsure what the plastic is, test adhesion on a hidden area first.

Is PlasticWeld waterproof?

Yes, once it is fully cured. It has a 20 to 25 minute work life and reaches a functional cure in two to three hours, but support recommends allowing a full 24 hours before exposing the repair to water. Apply it to a dry, sanded surface; it will not bond to a wet one. If you cannot dry the area, use WaterWeld (8277) instead.

Can PlasticWeld repair a plastic gas tank?

No. J-B Weld does not offer a lasting repair for plastic fuel tanks. They are typically polyethylene or polypropylene, which will not hold an epoxy bond, and tank vibration makes any patch less likely to last. TankWeld (8217) covers metal tanks only. For a cracked plastic tank, plastic welding or replacement is the reliable fix. Do not rely on epoxy to contain fuel.

Can PlasticWeld be sanded, drilled and color matched?

Yes. Once cured, PlasticWeld can be sawed, drilled, carved, sanded and painted, and it cures off-white. You can work powder tints into the putty before it sets, or paint it after a full cure, to match the surrounding color. You can also smooth it with a plastic spreader while it is still workable, though that window is short. For clean tapped threads, PlasticBonder (50139) machines better.

Will a PlasticWeld repair hold at freezing temperatures?

Yes, once it is fully cured. Apply it at room temperature and keep the repair above freezing until the cure is complete; after that it holds up in freezer and ice bin conditions. It will not cure at or below freezing. Keep in mind that PlasticWeld is non-toxic when cured but is not rated food safe, so avoid places where it contacts food or ice directly.

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