<p><strong>Isocyanate-free, weathering-resistant sealant</strong></p>
<p>Sikaflex&reg;-521 UV is a weathering-resistant, 1-component Silane Terminated Polymer (STP) sealant that cures on exposure to atmospheric humidity. This multipurpose product&nbsp; is suitable for internal and external sealing applications. &nbsp;</p>
<ul>
<li>Ageing and weathering resistant</li>
<li>Bonds well to a wide variety of substrates without the need for special pre-treatment</li>
<li>Can be painted</li>
</ul>
<p><strong>Usage</strong></p>
<p>Sikaflex&reg;-521 UV adheres well to a wide variety of substrates and is suitable for elastic sealing and bonding. Suitable substrate materials include timber, metals, metal primers and paint coatings (2-part systems), ceramic materials and plastics. Seek manufacturer&rsquo;s advice and perform tests on original substrates before using Sikaflex&reg;-521 UV on materials prone to stress cracking. This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed to ensure adhesion and material compatibility. &nbsp;</p>
<p><strong>Product Benefits</strong></p>
<ul>
<li>Ageing and weathering resistant</li>
<li>Bonds well to a wide variety of substrates without the need for special pre-treatment</li>
<li>Can be painted</li>
<li>Can be sanded</li>
<li>Low odour</li>
<li>Isocyanate- and solvent-free</li>
<li>Silicone- and PVC-free</li>
</ul>