---
product_id: 422558260
title: "GRS Tools 003-664 Thermo-Lock 1/2 lb."
brand: "grs"
price: "€ 107.96"
currency: EUR
in_stock: true
category: "Grs"
url: https://www.desertcart.pt/products/422558260-grs-tools-003-664-thermo-lock-1-2-lb
store_origin: PT
region: Portugal
---

# Heat-activated malleability Eco-friendly & biodegradable Secure grip on irregular shapes GRS Tools 003-664 Thermo-Lock 1/2 lb.

**Brand:** grs
**Price:** € 107.96
**Availability:** ✅ In Stock

## Summary

> ♻️ Mold your world with eco-smart grip power!

## Quick Answers

- **What is this?** GRS Tools 003-664 Thermo-Lock 1/2 lb. by grs
- **How much does it cost?** € 107.96 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/422558260-grs-tools-003-664-thermo-lock-1-2-lb)

## Best For

- grs enthusiasts

## Why This Product

- Trusted grs brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted by Creatives:** Highly rated with 4.7 stars from 116 reviews, a favorite in arts & crafts.
- • **Compact & Lightweight:** Portable 222g size fits effortlessly into any toolkit or workspace.
- • **Eco-Conscious Crafting:** Made from non-toxic, biodegradable polymer for guilt-free use.
- • **Heat-Responsive Flexibility:** Transforms from rigid to pliable with simple heating for easy shaping.
- • **Adaptive Hold for Every Shape:** Perfectly secures delicate and irregular items without damage.

## Overview

The GRS Tools 003-664 Thermo-Lock is a medium gray, polymer-based grip solution that securely holds irregular and delicate items. It is non-toxic, biodegradable, and temperature-responsive—rigid at room temperature and malleable when heated—making it ideal for precise, eco-friendly crafting and repair tasks.

## Description

International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

## Features

- Ideal for irregular or delicate items: Securely holds various shapes and fragilities
- Environmentally friendly: Non-toxic and biodegradable
- Temperature responsive: Rigid at room temp, malleable when heated

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00VQXCXXM |
| Best Sellers Rank | 834,613 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 320,809 in Arts & Crafts |
| Brand | GRS |
| Colour | medium gray |
| Customer Reviews | 4.7 4.7 out of 5 stars (116) |
| Date First Available | 6 April 2015 |
| Guaranteed software updates until | unknown |
| Item Weight | 222 g |
| Manufacturer | GRS |
| Manufacturer Part Number | 003-664 |
| Material Type | Polymer |
| Model Number | 003-664 |
| Package Dimensions | 17.5 x 6.6 x 3.3 cm; 222 g |

## Images

![GRS Tools 003-664 Thermo-Lock 1/2 lb. - Image 1](https://m.media-amazon.com/images/I/41ffZBI3-+L.jpg)

## Questions & Answers

**Q: at what temperature is it pliable?  I'm using a coffee warmer which goes to 131 degrees F, is that warm enough?**
A: It should be! I think it said 120 F in the instructions. I used a hair dryer for a while (slow but works) and now a heat gun.

**Q: Can this be used as a mold for metal resin or resin on pattern silicone sheets?**
A: I'm not sure if the resin will come away from the Thermo-lock cleanly or not.

**Q: Can Thermo-Lock be used to hold cast bezel pieces that require some removal of metal? Can it withstand some heat without the piece coming loose?**
A: Good question--Thermal lock heats very quickly in the microwave--and I only use it for engraving--I know it would hold the bezel in place nicely--as far as heat--maybe not

**Q: can it be used to embed stones on a jewelry piece while soldering? or will the compound melt too quickly?**
A: Do not - and I repeat DO NOT - expose to open flame.  It will burn quickly and the larger the piece the larger the flames and hotter it gets.  I tested it when I got the idea as well.  I test stones that I work with to see what their tolerance to soldering heat is.  Some stones are OK, but others will crack or shatter.  It is all part of the learning process.  Also, keep a fire extinguisher near your bench.

## Frequently Bought Together

- GRS - 1/2 Lb Bag Of Thermo-loc (225 Gm)
- VEVOR Ball Vise 5" Engraving Setting Tool 360°Rotation Engraving Block Vise 34 PCS Attachment Jewelry Engraving Block Tools Standard Block(5inch)
- Jewelry Engraver Tools,Engraving Cutting Bits for Pneumatic Impact Engraving Machine Jewelry Tool Edge Tungsten Steel Carving Graver Knife

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-09-07*