Seal-it® 211 SILICON-HT is a heat-resistant, high-quality, acetoxy silicone sealant. Specially designed for heat-resistant gaskets and/or liquid gaskets.
Seal-it® 211 SILICON-HT
- Heat resistant acetic acid based joint sealant
- Suitable for joint seals and liquid gaskets.
- High temperature resistant, permanent up to +300°C
Seal-it® 211 SILICON-HT is a heat-resistant, high-quality, acetoxy silicone sealant. Specially designed for heat-resistant gaskets and/or liquid gaskets.

Applications
- Specially developed as a durable heat-resistant, low-compression gasket compound for machinery and engine parts.
- Heat-resistant sealant for devices and equipment, such as pumps, generators, thermostats, hotplates, stoves, oven parts, boilers, water heaters, central heating units and other heating elements.
- Heat-resistant sealant, specially designed for installation work in the construction and industrial sectors, such as seals on hot water pipes and hot air ducts/pipes, adapters/fittings, smoke and air exhaust ducts, etc.

Properties
- Heat-resistant, continuous exposure up to +300°C, short/intermittent exposure up to +350°C.
- Durable, retains elasticity, maximum movement capacity of 25%.
- Fast acetoxy-curing, solvent-freeCE-certified silicone system.
- Excellent adhesion properties on many non-porous surfaces, such as metals.
- Easy to work with, smooth application.
- Good resistance to UV, weather, water, moisture and ageing.

Application conditions
- Application temperature (ambient and surface) between +5°C and +40°C.
- On stable, compatible, dry, clean, uncontaminated, grease-free and dust-free surfaces.
- Ensure proper joint dimensions, for proper absorption of any movements.
- Use a suitable brush to remove any loose particles from the surface.
- Degrease the surface properly using Seal-it® 510 CLEANER.
- Seal-it® 211 SILICON-HT has a broad bonding spectrum, but highly porous surfaces should be pre-treated with Seal-it® 520 PRIMER and non-porous surfaces with minimal bonding should be treated with Seal-it® 525 Clean & Bond.
- Use Seal-it® 550 FINISH to apply a smooth and tight finish, before skin formation.
Assortment
Colour | 12 x 310ml Cartridge | 12 x 200ml pressure pack |
Red | SI-211-3100-310 | BL-211-3100-200 |
Black | BL-211-9200-200 |
Standard available in Seal-it® 310ml cartridge and blank 200ml pressure pack. Seal-It packaging is available per pallet on request.
Package unit: Cartridge – 1248 pieces Pressure pack – 900 pieces
SI-XXX-XXXX-XXX = Item number.
Certification
- EN 15651-1: F-EXT-INT 25LM
- EN 15651-2: G 25LM
- EN 15651-3: XS1