Fire Door Seals

Fire doors and fire sealing systems are crucial for building safety, as they work together to prevent the spread of fire and smoke, protecting both occupants and property.
These systems include intumescent seals
Smoke seals
waterproof and acoustic seals that

When a fire isn’t occurring, fire door seals still serve important functions. They help with insulation, reducing drafts and energy loss by sealing gaps around the door. Additionally, smoke seals specifically prevent the spread of smoke in non-emergency situations, contributing to better indoor air quality. Acoustic seals also play a role by blocking sound transmission, improving privacy and noise control within a building.

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Types of Intumescent Fire Door Strips for Wooden Fire Doors and Metal Fire Doors

RPB Flexible Fire Door Strips

The flexible nature of the strips material permits it to be used for many applications where a rigid strip would be impractical such as tight corners, pipes or tubes.

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RESSA RYZD Intumescent fireproof seals for doors

RYZD Rigid Fire Door Strips

Sodium silicate based intumescent raw material, the rigid intumescent body when exposed to heat provides tightly and high pressure sealing between doors and frames

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RYZ Series Rigid Intumescent Seal

RYZ Rigid Fire Door Strips

Expandable graphite based intumescent materials, outside covered by PVC casing, expand 10-30times volumn than orignal sizes to seal air space when fire happens.

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RPB-YXSD Series Fire Door Strips

The seal can be installed along the edge of the rail or sealing area of steel and inorganic fabric fire shutters.

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RPB-YX Series Fire Door Strips

RPB-YX series special shape fireproof intumescent seal combines double functions of impact-resistant and fireproof sealing together, suitable for armored doors. 
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RPB-YXGT Series Fire Door Strips

Seals for high-speed trains not only reduce noise, but also react quickly to provide fire protection in the event of a fire.

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RSR Series Fire Door Strips

RSR series smoke seal is manufactured of high temperature silicone rubber which is self-extinguishing It can be used on doors where require smoke protection.

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RSR/RPB series Fire Door Strips

It is a kind of high temperature extruded silicone gasket compounding with RPB series intumescent seals.

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RYZW Series Fire Door Strips

RYZW series rigid fireproof intumescent seal is a kind of adhesive-backed seal with sodium silicate intumescent core inside and hard PVC casing outside.

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RRYSJJ Series Fire Door Strips

RRYSJJ series acoustic and smoke corner seal provides the acoustic smoke and heat (cold&hot) sealing for the gaps of door edges and frames.

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RRY Series Fire Door Strips

RRY series fire door strips acoustic and smoke seals demonstrate effective acoustic and smoke perimeter sealing for use in new or retrofit door applications.

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RPB-CR series Fire Door Strips

RPB-CR series seal is RPB series flexible fireproof intumescent seal compound with CR rubber seal, it has excellent fireproof smoke proof and acoustic sealing performance.

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RPB-HW series Fire Door Strips

Available to be customized according to specific lock body and hinges dimension, strong self-adhesive and accurate folding lines help easy installation.

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RMD/RPB-01 series Fire Door Strips

The automatic bottom door seal controls the movement of the inner sealing strip through mechanical movement.

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RMD/RPB-02 series Fire Door Strips

The shell is attached with intumescent fire strips, which will intumescent rapidly after encountering flames.

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RY-EPDM series Fire Door Strips

Adopts high-temperature shaping microwave vulcanization process, with good tensile and compression deformation resistance.

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Get Your Custom Intumescent Fire Door Strips

RESSA is a trusted supplier of full range of intumescent fire door strips, with years of experience in creating high-quality fire protection solutions. It specializes in manufacturing high-quality custom fire door seals and gaskets to cover various need of customers. Here are your custom selections:

Color

A wide range of customizable colors options of our intumescent fire door strips are available for fire door strips, black red grey brown cream and customized colors. This allows the sealings with your doors and frames design, ensuring a cohesive and professional appearance.

Size

We offer a wide range of sizes to meet customers’ needs. Whether you need flexible fire door strips, rigid fire door strips or any special sizes of fire door strips, we will cooperate to design. We provide the length cutting service for accurate length requirement within  (+1mm, -1mm) tolerance.

Material

Customization of different intumescent materials are available your spefic designed fire doors, including graphite intumescent materials and sodium silicate intumesent materials. Helping to enhance the fire protection for your fire doors and meet different test standards.

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Features that Make Our Intumescent Fire Door Strips Unique

expanding RESSA RPB Series Intumesent Fire Strips

Advanced Expansion Technology

RESSA intumescent fire door strips are engineered with a proprietary heat-activated expansion process that ensures rapid and uniform swelling of seals in fire, creating an impenetrable barrier against fire and smoke.

Superior Self Adhesive Performance

Surface mounted fire door strips equipped with industrial-grade adhesive, our strips self adhere firmly to a variety of surfaces, ensuring a long-lasting seal that won’t degrade over time or under extreme temperatures.

intumescent -RESSA RPB Series Fire door strips

Multi-Functional Sealing Performance

Beyond fire door insulation, some our intumescent fire door strips also offer excellent waterproof property, smoke prevent property, acoustic insulation and thermal properties, adding additional value to the installation.

BS476 Test RESSA RPB Series Intumesent Fire Strips

Tested Prooved and Certified Quality

Our products pass the testing of fire doors integrity and insulation test according to the BS476 test standard and have received certification from recognized safety standards organizations, assuring their effectiveness and reliability.

Manufacturing Process of Intumescent Fire Door Strips

  1. Raw Material Preparation: Gather materials including different kinds of fireproof intumescent materials, self adhesive, additives… ensure material expand to meet quality standards of fire doors requirement.
  2. Mixing: Mix the raw materials according to the formula and prepare them under specific temperature and humidity conditions. This may involve blending the expanding materials with other additives to achieve the desired physical and chemical properties.
  3. Extrusion or Calendering: Use an extrusion machine or pressing machine or inserting machine to shape the mixed intumescent materials, forming the initial shape of the intermittent strips.
  4. Cutting and Shaping: Cut the intermission strips to the specific dimensions and shapes. Precise molding may be achieved using molds or cutting tools.
  5. Quality Testing: Perform quality tests, including dimension checks, expansion performance, fire resistance, etc.for intumescent gasket.
  6. Packaging and Dispatch:Package the qualified intumescent strips and prepare them for dispatch to the market.
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Intumescent strips production process

Our Certificates in Intumescent Fire Door Strips

RESSA Test certificate (4)
RESSA Test certificate (5)
RESSA Test certificate (6)
RESSA Test certificate (1)

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Fire Door Strips FAQs

Fire Door Strips are specialized seals installed on fire doors to prevent the passage of smoke, flames, and toxic gases during a fire, enhancing the door’s ability to compartmentalize and contain the spread of fire.

Over-painting of fire door strips should not compromise performance in a fire situation – however, do not suggest paint over fire door strips as this will certainly compromise the sealing containment performance and use life. If the intumescent strips on fire doors has already been painted over, you will need to replace it. Our seals are available in a range of colours, plus woodgrain and metallic finishes, so over-painting should not be necessary.

In the event of a serious fire, fire doors are one of the most important components in ensuring safe exit, containing the fire and saving lives. But they can be rendered useless by not using the correct components including intumescent strip. Gaps around the four sides of a fire door leaf are essential, it is the only way the door can open and close. But these gaps create a point of weakness, where fire can take hold and destroy the door, and toxic and smoke can pass through. RESSA intumescent strip works by sealing around the edges and gaps of a fire door and door frames in the event of a fire.

In essence, all intumescent do the same job, but not necessarily in the same way. You’ll need to know which specifications you require; consult our technical team to discuss this area in depth at [email protected].

Yes, RPB Series flexible fire door strips are suitable for both new builds and for retrofitting into existing structures, providing an effective fire-stopping solution. The intallation method is very easy by self-adhesive.

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