Selleys Fireblock XT

How to Use 

• Cut tip of sausage. Insert in caulking gun and attach nozzle. Cut nozzle to size required for joint.  

• Extrude sealant smoothly into joint, while ensuring that all substrates are well wetted out with sealant. For fire rating, joint width should be between 20mm and 40mm. Minimum joint depth should be 10mm or half the width for joints wider than 20mm.  

• A tight fitting non-absorbent, non-adhering backing material should be used to ensure the correct dimensions and prevent three-surface adhesion.  

• Suitable materials include open cell foam backer rod or bond-breaking tape. 

• Curing: The sealant cures by reaction with atmospheric moisture therefore cure rate is dependent on humidity, ambient temperature, and joint size. Typically, the sealant will form a thick skin within 24 hours and full cure can be expected after 7 days. 

• In dry or cool conditions, the sealant cure will be longer. 

• Painting: Paintable with water-based paints after product skins (60 – 90 min). Allow longer times before painting in colder weather. Paint within 12 hours of application. Solvent-based paints may be used after first painting with a water-based paint. Due to the large number of paints and varnishes available, a preliminary test of compatibility is recommended. 

Handy Tips

• For neat joints use masking tape on both sides of the joint and remove before skinning. 

• In dry conditions, surfaces can be misted with water to speed up cure. 

Clean Up

Uncured product can be removed with mineral turpentine. Cured product can be removed by mechanical action. Use Poly Cleaning Wipes to remove sealant from the skin.