PU sealants can bubble in humid conditions and deteriorate under prolonged UV exposure. Silicone sealants resist weathering but cannot be painted and may stain porous stone.
They combine all-weather durability with permanent flexibility—curing without bubbles and sticking firmly to concrete, aluminum, wood, and masonry without primers.
Below is a quick technical comparison between MS polymers, PU, and silicone—and why Tengyu TM504 and TM505 are the most cost-effective choice for volume supply.
1.Performance Comparison: MS Polymer vs. Polyurethane vs. Silicone vs. Acrylic
Here is how the four main sealant types stack up in real-world performance.
| Característica | MS Polymer (Hybrid) | Polyurethane (PU) | Sellante de silicona | Acrylic Caulk |
UV Resistance | Excellent | Moderate | Outstanding | Poor |
Pintable | 100% Paintable | Pintable | Non-Paintable | Pintable |
Porous Substrate Staining | Non-Staining (No oils) | Low staining risk | Oil bleed / halo risk | Non-Staining |
Shrinkage on Curing | Zero shrinkage | Baja contracción | Very low | High shrinkage |
Primerless Bonding | Concrete, Metal, Wood | Often requires primer | Glass, Glazed tiles | Porous surfaces only |
Odor & Health Safety | Solvent & Isocyanate Free | Contains isocyanates | Acetic / Oxime odor | Bajo olor |
2. Where MS polymer Concrete Joint Sealant Offer Practical Advantages
MS polymer joint sealants can be a practical option when a project requires flexibility, weather resistance, and paintability in one product.
Depending on the formulation, they can bond to materials such as concrete, aluminum, and wood while resisting outdoor weathering.
For contractors and distributors, the main selection factors include:
- Joint movement: Confirm that the sealant’s movement capability meets the project requirements.
- Weather exposure: Check suitability for UV exposure, temperature changes, and outdoor conditions.
- Substrate adhesion: Verify compatibility with the actual building materials.
- Paint compatibility: Confirm the recommended curing time and compatibility with the intended coating.
- Installation requirements: Check whether primer is needed and whether the product can be applied under the expected site conditions.
3.Commercial Applications for Modified Silane Polymer Sealant
Because MS polymer concrete joint sealant handle both interior and exterior conditions, commercial contractors and distributors use them as a dependable all-purpose product.
1)Window and Door Sealing
Sealing gaps between window/door frames and masonry walls requires a material that absorbs building movement while blocking air and driving rain. MS polymer joint sealants adhere tightly to aluminum, UPVC, wood, and concrete without chemical primers, keeping exterior perimeters watertight.
2)Exterior Cladding, Siding, and Trim Gaps
Exterior siding panels, composite trims, and masonry joints expand and contract with temperature changes. Hybrid joint sealant with this movement without tearing. Once cured, you can paint over the sealant bead to match the exact building color.
3)Interior Baseboards, Trims
Interior fit-out contractors need a fast-tooling gap sealant that will not shrink or crack after painting. MS polymers contain zero isocyanates, zero solvents, and low VOCs.
4.Tengyu MS Polymer Sealant Solutions for Construction Projects
Tengyu supplies MS polymer joint sealants directly from the factory, offering reliable container-load delivery and full OEM packaging customization.
Specification / Parameter | Tengyu TM504 (Construction Elastic Sealant) | Tengyu TM505 (Premium All-Purpose MS Sealant) |
Product Positioning | Permanently elastic joint & perimeter sealant | High-strength universal elastic joint sealant |
Typical Applications | Window perimeters, siding, fiber cement board, wall/floor fillet joints | Multi-surface sealing: metal, wood, glass, ceramics, coatings & wall joints |
Resistencia a la tracción | 1.7 MPa | 2.3 MPa (Higher Strength) |
Resistencia al cizallamiento | 2.3 MPa | 2.8 MPa |
Elongation at Break | 260% – 470% | 300% – 700% (Higher Flexibility) |
Hardness (Shore A) | 45 | 45 |
Tiempo de piel | 35 Minutes | 35 Minutes |
Velocidad de curado | 2–3 mm / 24h | 2–3 mm / 24h |
Extrusion Ratio | 106 ml/min | 143 ml/min (Faster Tooling) |
Temperatura de servicio | -40℃ to +90℃ (Cured) | -40℃ to +90℃ (Cured) |
Core Features | Waterproof, weatherproof, no shrinkage, 100% paintable, low VOC | Zero toluene/formaldehyde, high elasticity, non-shrinking, non-toxic |
Packaging Options | 280ml/300ml Cartridges (24/ctn) 600ml Sausages (20/ctn) | 280ml/300ml Cartridges (24/ctn) 600ml Sausages (20/ctn) |
Standard Colors | White, Black, Grey, Custom OEM | White, Black, Grey, Custom OEM |
- TM504: Tengyu TM504 is an architectural-grade elastic MS sealant designed for exterior window perimeters, fiber cement boards, and siding joints. It provides 1.7 MPa tensile strength and reliable primerless adhesion to masonry and metals.
- TM505: Tengyu TM505 is a premium all-purpose hybrid sealant delivering higher bonding strength (2.3 MPa) and up to 700% elongation at break. It provides a tough, flexible seal across metals, wood, glass, ceramics, and wall joints.
5.Modified MS Sealant Frequently Asked Questions
What are MS polymer joint sealants used for?
They are for gap filling around windows and doors, siding panels, wall trims, and roof joints. They stay flexible, keep water out, and can be painted over once cured.
Why use MS polymer instead of acrylic caulk?
Acrylic caulk shrinks and cracks as it dries, and it washes out easily in the rain. MS polymer cures without shrinking, stays flexible, resists rain and sun, and sticks to concrete and metal without a primer.
Can you paint over MS polymer sealants?
Yes. Unlike silicone, MS polymer sealants take standard water-based and latex paints easily without beading up or peeling off.
What is the difference between Tengyu TM504 and TM505?
TM504 is designed for exterior window perimeters and general construction joints. TM505 is a higher-strength, universal sealant with stronger bonding power (2.3 MPa vs 1.7 MPa) for jobs needing extra flexibility across multiple materials.
TM504 is designed for exterior window perimeters and general construction joints. TM505 is a higher-strength, universal sealant with stronger bonding power (2.3 MPa vs 1.7 MPa) for jobs needing extra flexibility across multiple materials.
Can you apply MS polymer on damp surfaces?
Yes. Since MS polymer uses moisture in the air to cure, it can be applied on damp surfaces without bubbling, as long as there is no standing water.
What packaging does Tengyu offer for bulk orders?
Tengyu offers standard 280ml/300ml cartridges (24 pcs/carton) and 600ml foil sausages (20 pcs/carton). We also provide custom color matching, private-label printing, and full container export shipping.
Traditional acrylics crack, polyurethane bubbles in the heat, and silicone ruins paint jobs. Switching to MS polymer joint sealants gives your projects a clean, bubble-free, and 100% paintable seal that lasts.
With over 100,000 tons of annual capacity, Tengyu supplies factory-direct MS sealants worldwide with certified batch quality, full OEM private labeling, and competitive container pricing.
Ready to test our quality or get container pricing?
Contact Tengyu today to request free sample kits, technical data sheets (TDS), or a direct factory quote for TM504 and TM505 within 24 hours.
Contact Tengyu today to request free sample kits, technical data sheets (TDS), or a direct factory quote for TM504 and TM505 within 24 hours.