HT300 High Temperature Silicon

High Temperature Silicone HT300 Sealant from your private label producer

Our HT300 High Temperature Silicone Sealant is a high-performance, acetoxy-curing silicone developed for sealing applications exposed to elevated temperatures. It cures through exposure to atmospheric moisture to form a durable, permanently elastic and heat-resistant seal.

Manufactured in our own production facility in the Netherlands, HT300 is available under your own private label. The high-temperature silicone provides excellent resistance to temperatures up to +300°C, as well as good resistance to mineral oils, diluted acids, UV exposure and weathering, making it suitable for demanding automotive, heating, mechanical and industrial sealing applications.

  • Temperature resistant up to +300°C
  • Permanently elastic after curing
  • Mould-resistant
  • Colourfast and UV-resistant
  • Good resistance to mineral oils and diluted acids
  • Resistant to most common cleaning agents
  • Suitable for automotive, heating and industrial applications

 

Looking for a Private Label High Temperature Silicone Sealant Manufacturer?

Looking for a reliable private label manufacturer of high-temperature silicone sealants? We manufacture HT300 in-house in the Netherlands for professional automotive, heating, engine, machinery and industrial sealing applications where high temperature resistance is required.

Available in both cartridges and foil sausages, HT300 can be supplied fully under your own private label. With minimum order quantities starting from just one pallet, consistent European production quality and flexible private label possibilities, we help automotive and industrial brands create their own professional range of heat-resistant and high-temperature silicone sealants. We are happy to assist you. Explore the possibilities, learn more about how it works, or fill in the contact form. We’ll be happy to get back to you within one working day.

  • BaseAcetoxy
  • Density0.98 g/ml
  • Skin formation timeApprox. 15 minutes
  • Full cure2 mm per 24 hours
  • Shore A hardness24
  • Tensile strength1.25 N/mm²
  • Elongation at break350%
  • Application temperature+5°C / +40°C
  • Temperature resistance (cured)-50°C / +300°C
  • MOQfrom 1 pallet
Silicone Acetoxy

HT300 High Temperature Silicon

An acetoxy-based high-temperature silicone sealant, produced in our own production facility in the Netherlands and available in your private label.
  • Mould-resistant
  • Resistant to most common cleaning agents
  • Colourfast
  • Permanently elastic
  • UV resistant
  • Excellent workability
  • (Sea)water resistant
Base AcetoxyDensity 0.98 g/mlSkin formation time Approx. 15 minutesFull cure 2 mm per 24 hoursShore A hardness 24Tensile strength 1.25 N/mm²Elongation at break 350%Application temperature +5°C / +40°CTemperature resistance (cured) -50°C / +300°CMOQ from 1 pallet
Request your private label

Get a tailored proposal within 2 working days

No obligation · We typically reply within 2 working days

PRODUCT FAQ

Questions about HT300 High Temperature Silicon

Answers to what distributors ask most about this product. Can’t find yours? Our technical team replies within one working day.

Talk to a product specialist

Substrate advice, test reports or a custom formulation for your market.

As the manufacturer of this high-temperature silicone sealant, we produce it under your own brand name. It works in a few clear steps: together we select the right product and you test samples in your own application. We then customise the cartridge or sausage, the box and the label to your brand, with support from our in-house marketing team for the label design, and we take care of the technical and safety data sheets and the UFI codes. Finally, we produce, check every batch in our own laboratory and deliver on the agreed schedule.
Throughout the whole process you have one dedicated contact person. Private label is the core of our business, and our organisation and production are fully set up for it. We are happy to discuss your wishes and the possibilities.

We supply this high-temperature silicone sealant in private label in both cartridges and foil sausages. For cartridges with screen printing – the most professional and most popular option – the minimum order quantity (MOQ) is 1,248 pieces; labelled cartridges are also possible thanks to our own labelling machines. Foil sausages are available in private label from 660 pieces, with your product name printed on the packaging.
Looking for a lower MOQ? Contact our sales team to discuss the options. We are happy to take on the challenge with start-up and growing brands too.

HT300 High Temperature Silicon is an acetoxy-based high-temperature silicone sealant for joints, seams and connections that require high temperature resistance. Typical uses include heating installations, ovens and stoves (depending on direct flame exposure), ventilation and air ducts, engine and machine parts, industrial and automotive applications, and heat-exposed connections in metal, glass and ceramics. Once cured, it withstands temperatures from -50 °C to +300 °C.

It is not suitable for natural stone, as it can cause staining or edge discolouration, nor for mirrors, sensitive metals or corrosion-sensitive substrates, because the acetic acid released during curing can cause damage or corrosion. For those substrates a suitable neutral-curing silicone is recommended. The acetoxy cure also makes it less suitable for porous or alkaline substrates, and it cannot be painted over.

A skin forms in approx. 15 minutes and the sealant cures through at 2 mm per 24 hours; it can be applied between +5 °C and +40 °C. Because silicones need atmospheric moisture to cure, use in fully enclosed spaces is not recommended. Standard colours are black, white, grey, anthracite, transparent, transparent grey and RAL 9001, with other colours on request.

Talk to a product specialist

Substrate advice, test reports or a custom formulation for your market.

RELATED PRODUCTS

Complete your private-label range

Industrial Vehicle Polyurethane Sealant Adhesive private label producer
Polyurethane
  • Ultra-fast curing
  • High modulus, low-conductive
  • Suitable for airbag-equipped vehicles
Vehicle Polyurethane Sealant Adhesive private label producer
Polyurethane
  • High viscosity, strong initial tack
  • High UV & colour stability
  • For large glass surfaces
Windshield Polyurethane Sealant Adhesive private label producer
Polyurethane
  • Low-conductive, solvent-free
  • Suitable for integral antennas
  • Prevents contact corrosion
Car Body Polyurethane Sealant Adhesive private label producer
Polyurethane
  • Fast curing, high strength
  • Reduces vibration & noise
  • Paintable