<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31343751</termId><termName>methyl polysiloxane</termName><termType>PT</termType><termNote><![CDATA[ Consolidant used to treat deteriorated limestones, sandstones, and marbles.  ]]></termNote><termCreatedDate>2026-03-30 20:32:42</termCreatedDate><relation><relationType>UF</relationType><termId>31343752</termId><termName>polysiloxane, methyl</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31373565</termId><termName>polysiloxane</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31319855</termId><termName>consolidant</termName><termType>PT</termType></relation></term>  </Zthes>