MATERIALS, ADHESIVES AND COATINGS
MS359, MT382, MT3821, MT3809, MT3836 and PT321/326/328 flexible MS-polymer, hybrid and polyurethane adhesive-sealants
Country: United Kingdom · Model: MS359 / MT382 / MT3821 / MT3809 / MT3836 / PT321 / PT326 / PT328
The flexible adhesive-sealants MS359, MT382, MT3821, MT3809, MT3836 and the polyurethanes PT321, PT326, PT328 stay rubber-like or semi-rigid after curing. Elongation reaches 115–200 % in the MS-polymer and hybrid grades, and the polyurethanes are stiffer (Shore D65–D78). They suit joints with different thermal expansion and vibration, where the seam must also seal.
- MS359 (gray, clear, A)
- one-component, moisture-cure; elongation 115–175 %; Shore A45–A60; low shrinkage; non-sagging or self-leveling
- MT382/MT3821
- 2:1, self-leveling / thixotropic paste; pot life 20 / 40 min; elongation 175 / 125 %; Shore A70
- MT3809
- 10:1, self-leveling; skin-over time 1 h; elongation 200 %
- MT3836
- 2:1, flame-retardant UL94 V-0, thermal conductivity 1.05 W/(m·K), elongation > 100 %, Shore A60, dielectric strength 18–20 kV/mm
Technical specifications
| MS359 (gray, clear, A) | one-component, moisture-cure; elongation 115–175 %; Shore A45–A60; low shrinkage; non-sagging or self-leveling |
|---|---|
| MT382/MT3821 | 2:1, self-leveling / thixotropic paste; pot life 20 / 40 min; elongation 175 / 125 %; Shore A70 |
| MT3809 | 10:1, self-leveling; skin-over time 1 h; elongation 200 % |
| MT3836 | 2:1, flame-retardant UL94 V-0, thermal conductivity 1.05 W/(m·K), elongation > 100 %, Shore A60, dielectric strength 18–20 kV/mm |
| PT321/PT326/PT328 | polyurethanes 1:1, black, pot life 1 / 6 / 15 min, elongation 10–18 %, Shore D65–D78 |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
The MS359 is a one-component adhesive-sealant on silane-modified polymers that cures from air moisture. Elongation is 115–175 %, hardness Shore A45–A60, shrinkage is low, the seam on the visible side of thin panels hardly shows through, so the grade is also used outdoors. The gray and clear MS359 does not run off vertical surfaces, and the MS359A is self-leveling. The two-component hybrids of modified epoxy and MS polymer cure regardless of humidity. The MT382 (2:1, self-leveling, pot life 20 minutes), MT3821 (2:1, thixotropic paste, 40 minutes) and MT3809 (10:1, self-leveling, skin in 1 hour) have an elongation of 125–200 % at a hardness of Shore A70, so they fill deep seams. The MT3836 is flame-retardant (UL94 V-0), thermally conductive (1.05 W/(m·K)), with elongation over 100 %, Shore A60 and dielectric strength of 18–20 kV/mm, and is intended for electronics and battery housings. The black polyurethanes PT321, PT326 and PT328 are mixed 1:1, have a viscosity of 5500 mPa·s, pot life of 1, 6 and 15 minutes, hardness Shore D65–D78 and elongation of 10–18 %.
How to choose
The choice starts with the required flexibility. The softest MS359 is suitable for exterior seams, and the hybrids MT382, MT3821 and MT3809 are stiffer (A70) and cure in a thick layer. For electronics and batteries, where flame retardancy and heat removal are needed, the MT3836 is taken. For composites, in particular carbon-fiber, the polyurethanes PT321, PT326 or PT328 are suitable, and the working time is set by the grade, 1, 6 or 15 minutes. Rigid structural joints are better made with an epoxy of the ET series.
Request a price and lead time
MS359, MT382, MT3821, MT3809, MT3836 and PT321/326/328 flexible MS-polymer, hybrid and polyurethane adhesive-sealants. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
How does the MS359 differ from the hybrids MT382 and MT3821?
The MS359 is one-component, cures from moisture, elongation 115–175 %. The MT382 and MT3821 are two-component 2:1, their cure does not depend on humidity, hardness Shore A70.
Which adhesive should be used for battery and electronics housings?
The MT3836 is flame-retardant (UL94 V-0), thermal conductivity 1.05 W/(m·K), dielectric strength 18–20 kV/mm.
How long can PT321, PT326 and PT328 be worked with?
The pot life of these black 1:1 polyurethanes is 1, 6 and 15 minutes respectively.
What is the mixing ratio of the MT3809?
10:1. It is a self-leveling hybrid, skin forms in 1 hour, elongation 200 %.
Which MS359 should be used for vertical surfaces?
The gray or clear one, which do not run. The MS359A, on the contrary, is self-leveling.
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