Polyester Putty Resin

It is a liquid unsaturated polyester resin manufactured by Samrat Poly Resins and supplied to putty and filler manufacturers as the base resin in their own formulations. It is the liquid a putty maker charges to a disperser before adding fillers, thixotrope and pigment.

No. This is the base resin sold in bulk to manufacturers, not a finished two-part paste. If you need filler for a repair, you want a finished putty product with its matched hardener rather than this resin.

No, and the distinction matters. PET is polyethylene terephthalate, a saturated thermoplastic that is melted and re-melted. This is an unsaturated polyester thermoset: a liquid that crosslinks irreversibly and cannot be re-melted. Both carry the word polyester, and neither substitutes for the other.

The public name is now Polyester Putty Resin, and the page describes the putty base-resin role. Samrat separately holds a historical sheet-grade document that carries both names and describes sheet and laminate manufacture. Whether that sheet grade and this putty base resin are one grade or two is a question currently with our technical team, so this page does not present the sheet-grade data or documents as this product's own.

Those figures are confirmed against the production batch at the time of enquiry rather than published here, because a value carried across from a different grade is worse than no value at all. Tell us your filler loading target and working time and the current data can be matched to it.

Confirm this with our technical team for the current grade. Polyester putty is made on more than one cure route in practice — benzoyl peroxide with an amine dominates hand-applied body filler, while ketone peroxide with cobalt is used in sprayable and some marine putties — so the answer belongs to the specific grade rather than to the category.

That depends on your filler package as much as on the resin, since particle shape and oil absorption drive resin demand. Send your intended talc, carbonate and microsphere loading and your mixing equipment, and the achievable window can be discussed against the current grade.

Yes. Download the Technical Data Sheet and Safety Data Sheet from this page.

Your filler package and target loading, the working time and sanding window you are formulating to, your mixing equipment, the peroxide system your finished product uses, target colour, and the quantity, packaging and delivery location.