DOWSIL™ Smoke Seal 800SL

Geocel & DOWSIL™ Technologies for fire-rated applications

A self-leveling, one-part silicone sealant has excellent unprimed adhesion to many common, non-porous building substrates. A low-modulus sealant, with high adhesive strength and movement capability it has excellent fire resistant properties, which can help prevent the spread of smoke and flames in horizontal floor joints.

Product info


  • Up to four hour fire rating
  • Cures at room temperature when exposed to moisture in the air
  • No tooling required
  • Long service life
  • Excellent weathering characteristics, including resistance to ozone, UV and high temperatures
  • Non-corrosive to metals
  • Ready to apply
  • Fire resistance tested according to 1366-4
  • classified up to EI240 according to 13501-2 depending on detailing
  • Fire resistance tested according to UL2079
  • classified up to three hours FT depending on the joint configuration
  • Fire reaction tested according to EN1716 and EN11925
  • Fire reaction classification E according to EN13501-1
  • Tested according to EN15651-4



Technical Information

Where to use Interior
Paintable No
Skin Overtime 25 Mins
Time to cure disclaimer Sealant cure time is 2mm per 24 hours
Container Type Pails
Shelf life 12 months
Sizes 10Kg and 22Kg Pails


Application Instructions

Contact our expert team for advice, training and application instructions for this product!