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2. Grout - Wikipedia

   en.wikipedia.org/wiki/Grout

   Grout sealer is a water-based or solvent-based sealant applied over dried grout that resists water, oil, and acid-based contaminants. Grout cleaner is a basic cleaning solution that is applied on grout lines and removes the dirt and dust. [9] A die grinder is used for faster removal of old grout compared to a standard grout saw.

3. Poly(methyl methacrylate) - Wikipedia

   en.wikipedia.org/wiki/Poly(methyl_methacrylate)

   PMMA is used as a shield to stop beta radiation emitted from radioisotopes. Small strips of PMMA are used as dosimeter devices during the Gamma Irradiation process. The optical properties of PMMA change as the gamma dose increases, and can be measured with a spectrophotometer.

4. Non-shrink grout - Wikipedia

   en.wikipedia.org/wiki/Non-shrink_grout

   Non-shrink grout is a hydraulic cement grout that, when hardened under stipulated test conditions, does not shrink, so its final volume is greater than or equal to the original installed volume. It is often used as a transfer medium between load-bearing members.

5. Pressure grouting - Wikipedia

   en.wikipedia.org/wiki/Pressure_grouting

   Pressure grouting or jet grouting [1] involves injecting a grout material into otherwise inaccessible but interconnected pore or void space of which neither the configuration or volume are known, and is often referred to simply as grouting. The grout may be a cementitious, resinous, or solution chemical mixture. Some types of injected grout may ...

6. Toxic chemical ‘Hall of Shame’ calls out retailers in time ...

   www.aol.com/toxic-chemical-hall-shame-calls...

   “Almost half of the retailers scored zero for transparency on plastics and plastic additives. This underscores the urgent need for broader industry accountability to meet consumer expectations ...

7. Polyetheramines - Wikipedia

   en.wikipedia.org/wiki/Polyetheramines

   Chemical structure of triethylene glycol diamine, one of the simplest polyetheramines. Polyetheramines are a group of chemicals that are aliphatic organic species based on both ether and amine groups.