Dow Corning® firestop 700 Silicone Sealant

• The sealing of expansion joints and pipe and cable penetrations in fire rated structures.
• The provision of fire rated systems where expansion joints or penetration seals are required in curtain walling, building facades or partition walls.

Specification writers: These values are not intended for use in preparing specifications. Please contact your local Dow Corning sales office or your Global Dow Corning Connection before writing specifications on this product.

Dow Corning^® Firestop 700 Silicone Sealant is a low modulus, one-part, neutral curing, fire-rated silicone sealant. It has excellent unprimed adhesion to a range of common construction substrates including stone, steel, masonry, brick, wood, etc. It is ideal for weather-sealing of curtain walling, building facades and expansion joints where a fire rating is required. It is also suitable for use in penetration sealing systems where pipes and cables pass through fire rated structures.

Dow Corning Firestop 700 Sealant has been tested to BS 476 Part 22/1987 in expansion joint configurations, Fulmer Yarsley Test Report No. J82973/1 and SGS Test Report No. J86464/1. It also has been tested to BS.476 Part22/1987 (ISO 834) in pipe and cable penetration systems, Fulmer Yarsley Test Report No. J82973/2. It meets ISO 11600-F&G-25LM.

In compliance with the fire resistance requirement according to ETAG 026:

• Euroclass B according to EN 13501-1 (Reaction to fire)
• 2 to 4 hours fire resistance according to EN 1366-4 (Resistance to fire)

It meets the requirements of SNJF category 1 sealants.

It meets the requirements of DIN 18545, T2 and Class E of DIN 18540, T2, ISO 11600-F&G-25LM.

Fire test data is available illustrating that Dow Corning Firestop 700 Sealant can achieve up to a 4 hour fire rating at specified joint and penetration configurations. 

The test data provides a good indication of the expected performance of the sealant in fire situations. Users should satisfy themselves that specific applications for which Dow Corning Firestop 700 Sealant is proposed are suitable and testing of a particular system may be required. 

To achieve any specific fire rating, all substrates being used in the system must have at least an equivalent fire rating. 

Cleaning 

Ensure that all surfaces are clean, dry, sound and free from frost. Clean all joints of release agents, water repellents, laitance, dust, dirt, old sealants and other contaminants which could impair adhesion. Metal surfaces should be cleaned and degreased by wiping with a suitable solvent using an oil- and lint-free cloth. For further advice on cleaning specific substrates please contact Dow Corning’s Technical Services Department. 

Note: When using any solvent, always provide adequate ventilation. Avoid heat, sparks and open flames. Observe and follow all precautions listed on solvent container label or Product Safety Data Sheet. 

Dow Corning Firestop 700 Sealant should not be applied to surfaces that are below 5°C (41°F) as it is impossible to guarantee a dry, frost-free surface at these temperatures. 

Adhesion 

Dow Corning Firestop 700 Sealant has excellent adhesion to most common construction substrates. 

If in doubt, or if unusual substrates are involved, please contact Dow Corning’s Technical Services Department. 

Cement or concrete should be primed with Dow Corning® P Primer for optimum adhesion. 

Dow Corning will carry out specific adhesion and compatibility testing on individual substrates to ensure that correct recommendations can be made. If there is any doubt concerning any aspect of the use of Dow Corning Firestop 700 Sealant, users are strongly advised to contact Dow Corning’s Technical Services Department. 

Back-up materials 

Backer materials have been evaluated in various joint designs, these being closed-cell polyethylene foam backer rod, ceramic fiber and mineral wool. In penetration sealing applications, mineral wool has been evaluated. Depending on the fire rating required and the joint/penetration design, the most suitable system can be selected by referring to the rating tables (see Table 1). 

Masking 

Areas adjacent to the joints should be masked with tape to prevent contamination of the substrates and to ensure a neat sealant line. Masking tape should be removed immediately after tooling. 

Finishing 

The joint should be tooled within 5 minutes of application to ensure good contact between the sealant and the substrate. Tooling of the sealant also gives a smooth, professional finish. 

Clean-up 

Excess sealant should be cleaned off tools and non-porous surfaces whilst in an uncured state using a suitable solvent, such as Dow Corning® R40 Universal Cleaner. Sealant adhering to porous surfaces should be left until just cured and then removed by abrasion or other mechanical means. 

When designing joints using Dow Corning Firestop 700 Sealant, the minimum width should be 6mm. For joints between 6–12mm wide, a seal depth of 10mm is recommended.

Attainment of specific fire ratings is dependent on the joint configuration. Detailed information is given in Table 2.

Expansion joint types that have been tested are shown in Figure 1. The type of joint selected will depend on fire requirements for the project and aesthetics of the building.

For additional information or assistance, please contact Dow Corning’s Technical Services Department.

Dow Corning Firestop 700 Sealant has been developed for use in small penetration seal applications where it should be used in conjunction with specified backing material. Dow Corning Firestop 700 Sealant can also be used in conjunction with other Firestop products such as Dow Corning® Firestop 800 Self-Leveling Silicone Sealant. Please consult the relevant data sheets for further information.

For larger penetrations, Dow Corning® Firestop 3-6548 Silicone RTV Foam should be used.

Attainment of specific fire ratings is dependent on the joint configuration. Detailed information is given in the Fire rating Tables 3, 4 and 5.

Your Dow Corning contact details (e-mails): 

Technical inquiries: [email protected] 

Marketing: construction.marketing@ dowcorning.com 

Quality Bond: [email protected] 

EHS inquiries: [email protected] 

Reach inquiries: [email protected] 

Your Dow Corning Construction contact details (phone): 

Toll Free Numbers: 

From Belgium +0800 80 522 

From France +0805 54 04 39 

From Germany +0800 52 50 258 

From Italy +800 92 83 30 

From Spain +900 813161 

From United Kingdom +0800 9172 071 

All other countries: 

For English +32 64 51 11 59 

For French +32 64 51 11 59 

For German +49 611 237503

For Italian +32 64 51 11 73 

For Spanish +32 64 51 11 66 

For Russian +7 495 725 43 19 

Fax number from all countries: +32 64 88 86 86

PRODUCT SAFETY INFORMATION REQUIRED FOR SAFE USE IS NOT INCLUDED IN THIS DOCUMENT. BEFORE HANDLING, READ PRODUCT AND SAFETY DATA SHEETS AND CONTAINER LABELS FOR SAFE USE, PHYSICAL AND HEALTH HAZARD INFORMATION. THE SAFETY DATA SHEET IS AVAILABLE ON THE DOW CORNING WEBSITE AT DOWCORNING.COM, OR FROM YOUR DOW CORNING SALES APPLICATION ENGINEER, OR DISTRIBUTOR, OR BY CALLING DOW CORNING CUSTOMER SERVICE.

Dow Corning Firestop 700 Sealant is available in 310 ml cartridges packed in boxes of 12 and 20 liter pails.

Dow Corning Firestop 700 Sealant should not be used against substrates that bleed oils, plasticizers or solvent. Consult Dow Corning’s Technical Service Department for further advice in specific applications.

Dow Corning Firestop 700 Sealant is not intended for use as the structural seal in any application.

Dow Corning Firestop 700 Sealant is not intended to be commercialized in the United States.

This product is neither tested nor represented as suitable for medical or pharmaceutical uses.

To support customers in their product safety needs, Dow Corning has an extensive Product Stewardship organization and a team of Product Safety and Regulatory Compliance (PS&RC) specialists available in each area.

For further information, please see our website, dowcorning.com or consult your local Dow Corning representative.

Table 1: Estimating sealant requirements

Table 2: Fire rating Test Reports J82973/1 and J86464/1

Table 3: Fire rating Test Report J82973/2

Table 4: Fire rating Test Report 86K40074B

Legend

FS: Fireside of test furnace.

NFS: Non-fireside of test furnace.

CF: Ceramic fiber, aluminum silicate blanket of 128 kg/m3 nominal density.

MW: Mineral wool of 100 kg/m³ nominal density.

PE: Closed-cell polyethylene foam of 35 kg/m³ nominal density.

O: Outside diameter.