Chem Link DuraLink 50 is an extremely elastic, moisture cure, elastomeric sealant designed for use in roofing, cementitious siding, metal architecture, curtain wall construction and joints subject to movement. Has excellent elastomeric properties.
ChemLink DuraLink 50 is an extremely elastic, moisture-curing polyether sealant formulated for demanding construction and siding applications. It delivers excellent adhesion to difficult substrates such as anodized aluminum and Kynar 500 PVDF-coated metals, while remaining non-staining on stone surfaces like limestone and marble. With ±50% joint movement capability, UV resistance, and no outgassing on green concrete, DuraLink 50 ensures long-lasting flexibility and performance in exterior and interior joints.
| Technology | Moisture-curing polyether sealant |
| Movement Capability | ±50% (ASTM C920, Class 50) |
| Viscosity | 750,000 ± 150,000 cp (Brookfield RVF, 73°F) |
| Density | 11.0 ± 0.2 lbs/gal (ASTM D1475) |
| Tack-Free Time | 40 minutes (ASTM C679) |
| Elongation at Break | 700% (ASTM D412) |
| Tensile Strength | 200 psi (ASTM D412) |
| Peel Strength | 30 pli (ASTM C794) |
| Lap Shear Strength | 175 psi (ASTM D1002) |
| Hardness | Shore A: 23 (ASTM C661) |
| Service Temperature | -40°F to 200°F (-40°C to 93°C) |
| Low-Temperature Flexibility | Pass at -10°F (-23°C), 1/4 in mandrel bend |
| Shrinkage | No visible shrinkage after 14 days |
| VOC Content | < 22 g/L (ASTM D2369, EPA Method 24) |
| Certifications | ASTM C920, TT-S-00230C, CRD-C-541, CAN 19.13-M82, SWRI Validated, AAMA 802.3-08, 803.3-08, 805.2-08 |
| Packaging | 10.1 oz cartridges, 20 oz sausages, 2 & 5 gallon pails, 50 gallon drums |
| Shelf Life | 12 months (cartridges at 70°F); 6 months (pails) |
What makes DuraLink 50 different from other sealants?
Its polyether chemistry allows adhesion to coated metals, eliminates outgassing on damp or green concrete, and prevents discoloration under UV exposure.
Can it be used on natural stone?
Yes. DuraLink 50 will not stain absorbent stones such as marble or limestone.
Is DuraLink 50 paintable?
Yes. It can typically be painted within 24 hours under proper conditions.
What types of joints is it best for?
Expansion joints, control joints, precast concrete, siding, parapets, windows, doors, and curtain wall assemblies.
What packaging options are available?
Cartridges (10.1 oz), sausages (20 oz), and larger pails or drums by special order.
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